Tokushima University / Educator and Researcher Directory --- Ichimiya, Masashi

Personal Web Page

https://researchmap.jp/read0017390 (researchmap)

Field of Study

○	Fluid Mechanics

Subject of Study

○	Transition and Relaminarization of Boundary Layer, Structure and Control of Turbulent Flow (turbulent flow, boundary layer, transition, relaminarization, jet, pipe flow)

Book / Paper

Book:

1.	本阿弥真治, 元祐昌廣, 粥川洋平, 山田俊輔, 望月信介 and Masashi Ichimiya : JSME DATA BOOK: FLOW MEASUREMENTS, MARUZEN Co.,Ltd., Apr. 2022.
2.	大坂英雄, 藤田重隆, Masashi Ichimiya, 望月信介, 宇都宮浩司, 福島千晴, 亀田孝嗣 and 上代良文 : 流体工学の基礎, KYORITSU SHUPPAN.CO.,LTD, Mar. 2012.

Academic Paper (Judged Full Paper):

1.	Masashi Ichimiya, Ikuo Nakamura and Masaski Nakata : Relaminarization of accelerated turbulent boundary layer under favorable pressure gradient with sink flow type (Coherent structure and two-point statistics), Transactions of the JSME, Vol.88, No.909, 22-00010, 2022. (Summary) The relaminarization process of a turbulent boundary layer under a sink flow was investigated experimentally. The boundary layer was accelerated because of the contraction of the flow area. The mean and fluctuating velocity components were measured using a hot-wire anemometer. With relaminarization, the fluctuating velocity, which was normalized by the free-stream velocity, decreased. The degree of decrease differed between the streamwise and wall-normal components, depending on the distance from the wall. The conditional probabilities that two hot-wire probes separated in the spanwise direction simultaneously observed turbulent and nonturbulent flows were obtained. A spanwise-wide turbulent region was spread near the wall, but its width decreased as the distance from the wall increased. When the layer was relaminarized, this decrease in the spanwise width started near the wall. The low-speed streak spacing of the coherent structure was obtained from the lateral correlation coefficient of the streamwise fluctuating velocity and average spanwise spectra, and both parameters were somewhat consistent. Both the spanwise spacing of the streaks and the vertical scale of the coherent structure increased because of relaminarization. The conditional lateral correlation coefficient of the streamwise fluctuating velocity based on turbulence or nonturbulence was calculated. The streak spacing was slightly wider under nonturbulent conditions. This trend is consistent with the spreading behavior of the streak spacing, owing to relaminarization. With relaminarization, coherent structures became less frequent. (Keyword) transition / turbulence / turbulent flow / relaminarization / Reverse transition / boundary layer / Coherent structure (Tokushima University Institutional Repository) ● Metadata: 117153 (Link to Publication Site) ● Publication site (DOI): 10.1299/transjsme.22-00010 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390573715143589888 ● Search Scopus @ Elsevier (DOI): 10.1299/transjsme.22-00010 (Tokushima University Institutional Repository: 117153, DOI: 10.1299/transjsme.22-00010, CiNii: 1390573715143589888)
2.	Masashi Ichimiya and Ikuo Nakamura : Various information and complexity measures for analyzing the laminar-turbulent transition process in mixing layer, Transactions of the JSME, Vol.86, No.890, 2020. (Summary) In this paper, the laminar-turbulent transition process of a mixing layer downstream of a two-dimensional nozzle exit was analyzed based on various information and complexity measures. Shannon entropy, permutation entropy, and approximated Kolmogorov complexity were also obtained. To obtain the Shannon entropy, the temporal probability distribution of the hot-wire output voltage data was determined and analyzed. In addition to the fluctuating velocity, its time derivative and the square of this derivative were analyzed. The Shannon entropy of the time derivative and its square slightly decreased downstream, in accordance with the increase in the time scale of the turbulence. When the length of the extracted data was constant, the permutation entropy of the time derivative and its square increased around the peripheral region of the mixing layer, in accordance with the intermittent nature of the velocity signals. The region is at the 3-4 times farther from the jet centerline than the region where the fluctuating velocity becomes maximum. When the length of the extracted data was varied in accordance with the integral time scale of turbulence, the permutation entropy initially decreased in the potential core and subsequently increased after the disappearance of the potential core, as the transition progressed. The approximated Kolmogorov complexity of the time derivative and its square were smaller than that of the fluctuating velocity. Owing to the simplification of the data, they slowly increased after the disappearance of the potential core and then quickly decreased after the development of turbulence. (Keyword) transition / turbulence / turbulent flow / Shannon entropy / Permutation entropy / Kolmogorov complexity / mixing layer (Tokushima University Institutional Repository) ● Metadata: 115415 (Link to Publication Site) ● Publication site (DOI): 10.1299/transjsme.20-00130 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1299/transjsme.20-00130 (Tokushima University Institutional Repository: 115415, DOI: 10.1299/transjsme.20-00130)
3.	Masashi Ichimiya and Ikuo Nakamura : Analysis of laminar-turbulent transition process in mixing layer with various information measures, Transactions of the JSME, Vol.83, No.845, 2017. (Summary) In the laminar-turbulent transition process of a mixing layer formed downstream of a two-dimensional nozzle exit, an analysis was performed based on various information measures. Shannon entropy, permutation entropy and Kullback-Leibler divergence were introduced, and former studies in which they were used in the turbulent analysis were then reviewed. In the present study, the probability distribution of time series of hot-wire output voltage data was obtained, then analyzed. The aim of the investigation was to clarify the effectiveness of the analysis for the transition and turbulent flow. In addition, equations which Shannon entropy must satisfy in the turbulent flow field were derived. The Shannon entropy of the fluctuating velocity changed monotonically in the downstream direction. Thus, it appears to measure the transition process in the mixing layer. The permutation entropy of the fluctuating velocity first increased, then decreased, then increased again, and decreased finally. It reflected the increase of the fluctuating velocity and change of fluctuation manner (from periodic to irregular fluctuation) during the transition process. The Kullback-Leibler divergence based on the probability density function of the fluctuating velocity increased first, then decreased downstream, and thus did not show a monotonic change during the transition process in the mixing layer. (Keyword) transition / Turbulence / turbulence / Shannon entropy / Permutation entropy / Kullback-Leibler divergence / Probability density function / mixing layer (Tokushima University Institutional Repository) ● Metadata: 115272 (Link to Publication Site) ● Publication site (DOI): 10.1299/transjsme.16-00497 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1299/transjsme.16-00497 (Tokushima University Institutional Repository: 115272, DOI: 10.1299/transjsme.16-00497)
4.	Masashi Ichimiya, Ikuo Nakamura and Kazuhiro Tamura : Randomness representation in turbulent flows with Kolmogorov complexity (In laminar-turbulent transition due to periodic injection in an inlet boundary layer in a circular pipe), Transactions of the JSME, Vol.81, No.828, 2015. (Summary) The complexity or randomness of the laminar-turbulent transition process of an inlet boundary layer in a circular pipe was analyzed by use of Kolmogorov complexity which is a very important measure of the randomness of various events. In the inlet region of the circular pipe, a jet that triggered a turbulent patch in the flow was periodically injected radially, and then propagated downstream periodically. Periodic velocity data which satisfies the phase constancy obtained from a hot-wire anemometer were compressed using a compression program running on a Windows PC. From the compressed data, theapproximated Kolmogorov complexity, named AK, and normalized compression distance NCD were obtained. Although the distribution of AK of irregularly fluctuating velocity in the flow showed a slight discrepancy from the profile of fluctuating velocity intensity and intermittency factor, they exhibited qualitative consistency. Therefore, the objective judgment of the laminar-turbulent transition process based on the approximated Kolmogorov complexity mostly supports the conventional judgment. In conclusion, our study established the validity and usefulness of Kolmogorov complexity or algorithmiccomplexity to describe objectively the laminar-turbulent transition process in the mixing layer, flat plate boundary layer and pipe flow. With the aid of the AK we can distinguish the complexity within the turbulent region; on the other hand, the intermittency factor cannot. (Keyword) transition / turbulence / boundary layer / Randomness / Kolmogorov Complexity / Normalized Compression Distance / pipe flow / Inlet region / Isolated turbulent patch (Link to Publication Site) ● Publication site (DOI): 10.1299/transjsme.15-00172 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1299/transjsme.15-00172 (DOI: 10.1299/transjsme.15-00172)
5.	Junichiro Fukutomi, Toru Shigemitsu, Masashi Ichimiya, Takashi Sumitomo and Yoshio Yoshimura : Study of emulsification mechanism and droplet size estimation in a homogenizer, Transactions of the JSME, Vol.80, No.820, 2014. (Summary) A pressure type homogenizer consists of a plunger pump, and a valve part with a narrow channel. It generates effects such as a shear, a turbulent flow and a cavitation between fluid molecules at very short time, and makes a homogeneous emulsification state. If the flow pattern in a valve can be solved in more detail, the more efficient and stabilized emulsification will be attained. However, since it is difficult to measure the size, the pressure and the flow velocity in a narrow gap space by experiment, the details of the mechanism of emulsification by s shear, a turbulent flow, a cavitation and a collision have not been clarified enough. In this research, the size of gap is first calculated from the theoretical equation assumed to be laminar flow, based on the Reynolds number of the gap flow. Next, the pressure, the flow velocity, shearing stress, etc. are calculated. Then, the emulsification mechanism of each part of the valve is clarified by expressing the droplet size as a function of the gap size, the shearing stress and the exit velocity about two kinds of original solutions in which interfacial tension differs. Furthermore, the prediction expression of droplet size obtained by the emulsification is proposed. (Keyword) Shear flow / internal flow / Liquid droplet / numerical simulation / fluid machinery / Homogenizer (Link to Publication Site) ● Publication site (DOI): 10.1299/transjsme.2014fe0358 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282680491895424 ● Search Scopus @ Elsevier (DOI): 10.1299/transjsme.2014fe0358 (DOI: 10.1299/transjsme.2014fe0358, CiNii: 1390282680491895424)
6.	Masashi Ichimiya, Hiroshi Sakai and Takeshi Oohara : Properties of the laminar-turbulent transition in a mixing layer by the low-frequency disturbance, --- Effect of the anti-symmetrical disturbance ---, Journal of Fluid Science and Technology, Vol.9, No.3, 2014. (Summary) The laminar-turbulent transition of a mixing layer excited by oscillating flat plates at an exit of a two-dimensional nozzle was experimentally investigated. The plates oscillated vertically in relation to the mean flow. Upper and lower flat plates oscillated anti-symmetrically. The oscillation frequency, 5 Hz, was two orders of magnitude smaller than the fundamental frequency of the velocity fluctuation in the natural transition process. The results were compared with the previous case in which the plates oscillated symmetrically. Anti-symmetrical oscillation promoted the expansion of the mixing layer and promoted the disappearance of the potential core more than symmetrical oscillation. The fluctuations from time and phase averages in the anti-symmetrical oscillation were larger than those in the symmetrical oscillation. In the linear region of the transition, the irregular fluctuation grew exponentially. There were not any differences in the spatial growth rate between the streamwise and normal directions and among three oscillating states. (Keyword) mixing layer / transition / jet / turbulence / Shear flow / Oscillating plate / Periodic disturbance (Link to Publication Site) ● Publication site (DOI): 10.1299/jfst.2014jfst0038 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282680223898880 ● Search Scopus @ Elsevier (DOI): 10.1299/jfst.2014jfst0038 (DOI: 10.1299/jfst.2014jfst0038, CiNii: 1390282680223898880)
7.	Kunihiko Ishihara and Masashi Ichimiya : On Behaviors of Pressure and Velocity in Duct with Tube Bank at Onset of High Level Sound, Transactions of the JSME, Vol.80, No.815, 2014. (Summary) Vortices occur when gas flow passes through a duct with a tube bank of the heat exchangers, such as a gas heater and a boiler. Very high level sound called a "self-sustained tone" occurs due to the interference of the vortices and the sound field in the duct. There are many investigations concerning the generation mechanism and countermeasures of the self-sustained tones. However there are few investigations focusing on the behaviors of the pressure and the velocity in occurrence of the self-sustained tones. In the past, we experienced the failure of the fan blade used in the experiment. In this paper, the experiment was carried out to examine the behaviors of the pressure and the velocity in the duct with tube bank. As a result, the static pressure changes along the squared curve when the self-sustained tone does not occur. But it suddenly rises up when the self-sustained tone occurs and it is possible for this pressure rise to cause the blade failure due to the generation of the rotating stall. In addition, it was clarified that the flow velocity does not increase in proportion to the inverter frequency and its gradient decreases when the self-sustained tone occurs. (Keyword) Noise control / acoustic noise / Natural frequency / flow-induced vibration / Rotating Stall (Link to Publication Site) ● Publication site (DOI): 10.1299/transjsme.2014dr0204 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282680492566144 ● Search Scopus @ Elsevier (DOI): 10.1299/transjsme.2014dr0204 (DOI: 10.1299/transjsme.2014dr0204, CiNii: 1390282680492566144)
8.	Masashi Ichimiya, Ikuo Nakamura and Tatsuhiko Hara : Randomness representation in turbulent flows with Kolmogorov complexity (In turbulence wedge developed from a single roughness element on a flat plate), Transactions of the JSME, Vol.80, No.813, 2014. (Summary) The complexity or randomness was examined with the aid of Kolmogorov complexity for the flow about a turbulence wedge developed from a single roughness element on a flat plate. Velocity data obtained from a hot-wire anemometer and its time derivative data were compressed using a compression program running on a Windows PC. Approximated Kolmogorov complexity, AK, and normalized compression distance, NCD, were obtained. Although the AK variation of fluctuating velocity and that of its time derivative do not completely agree with that of the fluctuating velocity and the intermittency factor, they do roughly. Therefore, the objective judgment of the laminar-turbulent transition progress based on the Kolmogorov complexity mostly supports the judgment by the conventional intermittency factor. With the aid of the AK we can distinguish the complexity within the turbulent region; on the other hand, the intermittency factor cannot. The AK distribution of fluctuating velocity and that of time derivative are similar, and this suggests the similarity in the differentiation of complexity. The AK in the turbulent flow is larger than that in the non-turbulent flow. The AK decreases when the coherent structure has occurred in the turbulent flow. This means that the length of the algorithm is short if a computer expresses the coherent structure detected by the conventional method. Although the hot-wire signal within the coherent structure is random in appearance, it is coherent in the algorithm view. The difference in NCD on the time derivative of the fluctuating velocity between the turbulent and non-turbulent flow is larger than the NCD on the fluctuating velocity itself. That is, the difference in complexity appears in the fluctuating vorticity more than in the fluctuating velocity. (Keyword) transition / turbulence / boundary layer / Randomness / Kolmogorov Complexity / Normalized Compression Distance / Single Roughness Element / Turbulence Wedge (Link to Publication Site) ● Publication site (DOI): 10.1299/transjsme.2014fe0117 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282680493130368 ● Search Scopus @ Elsevier (DOI): 10.1299/transjsme.2014fe0117 (DOI: 10.1299/transjsme.2014fe0117, CiNii: 1390282680493130368)
9.	Kunihiko Ishihara, Shunya Tsukamoto and Masashi Ichimiya : Study on Effect of Absorbent on Acoustic Damping of Duct, Transactions of the JSME, Vol.80, No.809, 2014. (Summary) The acoustic material has been used inside ducts as a countermeasure of the self-sustained tone generated from heat exchangers and boilers. However the effects of the amount of acoustic material and its patching position in a lined duct on the acoustic damping in its duct have not been established. It can be expected that we can suggest the guideline of absorbing treatment at the design stage to avoid the generation of the self-sustained tone. In this study, the experiment and the analysis are carried out to clarify the problems mentioned above. First the usefulness of the analytical method by BEM is shown by comparing experimental results referring to the acoustic damping in the duct. Next, the effects of the amount of acoustic material and its patching position relative to the noise source on the acoustic damping in the duct are examined by BEM analysis. As a result, it was confirmed that the analytical method due to BEM was useful to predict the acoustic damping because the analytical results of acoustic damping were in good agreement with the experimental ones. And the acoustic damping was also clarified to be affected strongly by the positional relation between the noise source and the acoustic material. In addition, it was effective to patch the acoustic material near the noise source. (Keyword) Acoustic Material / BEM / self-sustained tone / Tubes Bank / Lined Duct (Link to Publication Site) ● Publication site (DOI): 10.1299/transjsme.2014dr0013 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390001205516301312 ● Search Scopus @ Elsevier (DOI): 10.1299/transjsme.2014dr0013 (DOI: 10.1299/transjsme.2014dr0013, CiNii: 1390001205516301312)
10.	Masashi Ichimiya, Hayato Matsudaira and Hayato Fujimura : Laminar-turbulent transition of an inlet boundary layer in a circular pipe induced by periodic injection, --- Turbulence within isolated turbulent patches and its growth mechanism ---, Journal of Fluid Science and Technology, Vol.9, No.1, 2014. (Summary) The laminar-turbulent transition of a boundary layer induced by a jet injection in the inlet region of a circular pipe was experimentally investigated. The jet was periodically injected radially from a small hole in the inlet region into the pipe flow. Axial velocity was measured by a hot-wire anemometer. The turbulent patches originated by the jet. Turbulent fluctuations within the patch were maximum a little inside from the leading edge in the axial direction and a little inside from the peripheral interface in the circumferential direction. Non-turbulent fluid was entrained into the patch through the leading and trailing edges. This was the main reason for the axial growth of the patch downstream. If the entrainment is suppressed, the axial growth is inhibited. (Keyword) pipe flow / transition / boundary layer / turbulence / Inlet Region / Isolated Turbulent Patch / Turbulent Spot (Link to Publication Site) ● Publication site (DOI): 10.1299/jfst.2014jfst0003 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390001205245081600 ● Search Scopus @ Elsevier (DOI): 10.1299/jfst.2014jfst0003 (DOI: 10.1299/jfst.2014jfst0003, CiNii: 1390001205245081600)
11.	Kunihiko Ishihara, Masashi Ichimiya and Tomoji Yoshida : Acoustic Characteristics of Flow Noise Generated from Air-Conditioning Duct of Rail Vehicle, Vehicle Engineering, Vol.1, No.4, 81-89, 2013. (Summary) Noise from an air conditioning duct of a rail vehicle is annoying for passengers especially when the rail vehicle is in a resting state. Then the noise reduction is very important from the point of view of keeping the car room comfortable and is one of the differentiating techniques. This paper described experimental results of flow noise characteristics. In this study, the flow noise characteristics generated from the air conditioning duct have been studied experimentally by using the duct with four holes. As a result, it was clarified that the noise reduction effect of the absorbing treatment could be neglected when the noise source was made only by the flow and is much when the fan noise is greater than the flow noise. (Keyword) aeroacoustics / Acoustic Characteristics / Straght Duct
12.	Masashi Ichimiya, Hayato Matsudaira, Hayato Fujimura and Hideki Ohno : Laminar-Turbulent Transition of an Inlet Boundary Layer in a Circular Pipe Induced by Periodic Injection, --- Shape of Isolated Turbulent Patches and Their Growth ---, Journal of Fluid Science and Technology, Vol.8, No.3, 436-451, 2013. (Summary) The laminar-turbulent transition of a boundary layer induced by an ejection of jet in the inlet region of a circular pipe was experimentally investigated. The jet was periodically inserted radially from a small hole in the inlet region into the pipe flow. Axial velocity was monitored by a hot-wire anemometer. The difference of properties in laminar-turbulent transition from developed Hagen-Poiseuille flow was examined. Isolated turbulence patches were generated by the jets, and then they propagated downstream. The leading and traiking edges of the turbulent patch were similar to those of a turbulent spot in a flat-plate boundary layer. The threshold value of the jet flow rate to generate the turbulent patch decreased and saturated finally with the increase in jet duration. The normalized jet duration when the threshold value was saturated and the normalized threshold flow rate were different from those of the developed region. With the increase in jet flow rate beyond the threshold value, the duration of the turbulent patch increased, though the fluctuating velocity within the patch did not increase. The propagation velocities of the leading and trailing edges, the duration and fluctuating velocity within the turbulent patch were almost constant irrespective of the jet ejection frequency. (Keyword) pipe flow / transition / boundary layer / turbulence / Inlet Region / Isolated Turbulent Patch / Propagation Velocity / Turbulent Spot (Link to Publication Site) ● Publication site (DOI): 10.1299/jfst.8.436 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282680223343616 ● Search Scopus @ Elsevier (DOI): 10.1299/jfst.8.436 (DOI: 10.1299/jfst.8.436, CiNii: 1390282680223343616)
13.	Masashi Ichimiya and Ikuo Nakamura : Randomness Representation in Turbulent Flows with Kolmogorov Complexity (In Mixing Layer), Journal of Fluid Science and Technology, Vol.8, No.3, 407-422, 2013. (Summary) The Kolmogorov complexity which measures the randomness were introduced. Numerical and graphic data in the mixing layer which was formed downstream of two-dimensional nozzle exit were compressed with the aid of a compression program. Approximated Kolmogorov complexity, AK, and normalized compression distance, NCD, were obtained. The AK indicated the regularity of the laminar flow and the randomness of the turbulent flow quantitatively. The NCD of the numerical value varied with data length. Between the same data, it approached zero, yet, on the other hand, between different data, it approached unity as the data length increased. The NCD of the numerical value in the natural transition process in the mixing layer increased monotonically downstream. Thus the NCD appears to be the measure of the transition process. (Keyword) turbulence / Randomness / Kolmogorov Complexity / Normalized Compression Distance / mixing layer (Link to Publication Site) ● Publication site (DOI): 10.1299/jfst.8.407 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282680223304320 ● Search Scopus @ Elsevier (DOI): 10.1299/jfst.8.407 (DOI: 10.1299/jfst.8.407, CiNii: 1390282680223304320)
14.	Masashi Ichimiya, Takehiro Miura and Shinya Kamada : Effect of Local Periodic Disturbance on Mixing Layer Downstream of Two-Dimensional Jet(Effect of amplitude and frequency of the disturbance), Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.79, No.806, 2093-2108, 2013. (Summary) The laminar-turbulent transition of a mixing layer induced by oscillating flat plates at the exit of a two-dimensional nozzle was experimentally investigated. The plates oscillated vertically in relation to the jet. The oscillation frequency was two orders of magnitude smaller than the fundamental frequency of the fluctuating velocity. As the flow proceeds downstream, the mixing layer entrains the surrounding quiescent fluid. This entrainment is affected by the oscillating frequency rather than the oscillating amplitude. The variation of the streamwise velocity with the oscillating phase is much affected by the oscillating amplitude rather than the oscillating frequency. For an irregularly fluctuating velocity, a linear region where the velocity grows exponentially first exists. The spatial growth rate in this region is the same between the streamwise and normal components, and does not differ with various oscillating amplitudes and frequencies. (Keyword) Mixing Layer / transition / turbulence / jet / Shear Flow / Oscillating Plate / Periodic Disturbance (Link to Publication Site) ● Publication site (DOI): 10.1299/kikaib.79.2093 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282681238227840 ● Search Scopus @ Elsevier (DOI): 10.1299/kikaib.79.2093 (DOI: 10.1299/kikaib.79.2093, CiNii: 1390282681238227840)
15.	Junichiro Fukutomi, Takashi Sumitomo, Yoshio Yoshimura, Toru Shigemitsu and Masashi Ichimiya : Study of Emulsification Mechanism in a Pressure Type Homogenizer, Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.79, No.806, 2030-2040, 2013. (Summary) Emulsification technique is used in broad fields, such as food, chemistry, and medical treatment, and the range of use has been spreading still more. A pressure type homogenizer consists of a plunger pump and a valve part with a narrow channel. It generates the effects of shear, a turbulent flow and cavitation at very short time, and then makes a homogeneous emulsification state. If the flow pattern in the valve can be solved in more detail, the more effective and stabilized emulsification will be attained. However, since the measurement of the size, the pressure and the flow velocity in a narrow gap space by experiments is difficult, the details of the mechanism of emulsification by the shear, the turbulent flow, the cavitation and a collision have not been clarified enough. In this research, the size of gap is first calculated from the theoretical equation assumed to be laminar flow, based on the Reynolds number of the gap flow. Next, the pressure, the flow velocity, shearing stress, etc. are calculated. Then, the emulsification mechanism of each part of the valve is clarified by expressing the droplet size as a function of the gap size, the shearing stress and the exit velocity. (Keyword) Fluid Machinery / Homogenizer / Emulsification / Liquid Droplet / Internal Flow / Shear Flow / Numerical Simulation (Link to Publication Site) ● Publication site (DOI): 10.1299/kikaib.79.2030 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390001206261517440 ● Summary page in Scopus @ Elsevier: 2-s2.0-84887488368 (DOI: 10.1299/kikaib.79.2030, CiNii: 1390001206261517440, Elsevier: Scopus)
16.	Kunihiko Ishihara, Taisuke Tamehira, Masanori Tsuji and Masashi Ichimiya : Study on a Countermeasure of Self-Sustained Tone by a Baffle Plate in Boiler Tube Banks, Journal of Basic and Applied Physics, Vol.2, No.3, 148-154, 2013. (Summary) In heat exchangers such as boilers and gas heaters, tube banks are set in a duct such that water passes through inside the tubes and warm gas outside the tubes. Due to the external flow, the resonance phenomenon called the self-sustained tone occurs at a certain velocity. The self-sustained tone might cause noise problems in the surroundings, cause losses due to plant shutdown etc. The insertion of baffle plates in the duct is one of a few countermeasures of the self-sustained tone. However, the mechanism of suppression of the self-sustained tone is not understood. Thus, the purpose of this study is to clarify a new mechanism of suppression of the self-sustained tone by baffle plate insertion and the best insertion conditions for baffle plates in tube banks. (Keyword) self-sustained tone / Baffle Plate / Boiler Tube Bank
17.	Kunihiko Ishihara and Masashi Ichimiya : Study on Acoustic Characteristics of Lined Duct, Journal of Frontiers in Construction Engineering, Vol.2, No.2, 25-33, 2013. (Summary) Lined ducts are widely used to reduce the noise generated from various equipments. The noise reduction of non-lined ducts is usually predicted by using the FEM and the BEM techniques. In this research, the analytic value of BEM was compared with the actual measurement value for the attenuation quantity within a lined duct. Then, a noticeable gap was caused between both results in specific frequency. Thus, the cause was probed with a viewpoint of the specific acoustic impedance ratio used for BEM. As a result, it was found that the prediction of sound attenuation of the duct agrees with the experimental result. (Keyword) Sound and Acoustics / Noise Control / Boundary Element Method / Environmental Engineering
18.	Masashi Ichimiya, Hayato Matsudaira and Hayato Fujimura : Laminar-Turbulent Transition of an Inlet Boundary Layer in a Circular Pipe Induced by Periodic Injection, --- Turbulence within Isolated Turbulent Patches and Its Growth Mechanism ---, Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.79, No.801, 863-878, 2013. (Keyword) pipe flow / transition / boundary layer / turbulence / Inlet Region / Isolated Turbulent Patch / Turbulent Spot (Link to Publication Site) ● Publication site (DOI): 10.1299/kikaib.79.863 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1299/kikaib.79.863 (DOI: 10.1299/kikaib.79.863)
19.	Masashi Ichimiya, Shinya Kamada, Akiyoshi Okajima and Takayuki Oosaki : Effect of Local Periodic Disturbance on Mixing Layer Downstream of Two-Dimensional Jet (Spatial Structure and Quantitative Representation of Laminar-Turbulent Transition Process), Journal of Fluid Science and Technology, Vol.8, No.1, 90-105, 2013. (Summary) The laminar-turbulent transition of a mixing layer induced by oscillating flat plates at an exit of a two-dimensional nozzle was experimentally investigated. The plates oscillated vertically in relation to the mean flow. The oscillation frequency was two orders of magnitude smaller than the fundamental frequency of the velocity fluctuation. In the oscillating state, the same phenomenon as in the natural transition process appeared more upstream. In the early stage within the nonlinear region, the growth of fluctuating velocity attenuated and the Reynolds shear stress component decreased. The decrease in their production rate due to the expansion of the mixing layer contributed to the attenuation and decrease. The randomness factor appeared to be a reasonable indicator of the present transition process, especially in the process in which the periodic velocity fluctuation became irregular. However, this factor certainly indicated the same value at two streamwise positions. (Keyword) mixing layer / transition / turbulence / jet / Shear Flow / Oscillating Plate / Periodic Disturbance / Nonlinear Region / Randomness Factor (Link to Publication Site) ● Publication site (DOI): 10.1299/jfst.8.90 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282680221436160 ● Search Scopus @ Elsevier (DOI): 10.1299/jfst.8.90 (DOI: 10.1299/jfst.8.90, CiNii: 1390282680221436160)
20.	Masashi Ichimiya, Hayato Matsudaira, Hayato Fujimura and Hideki Ohno : Laminar-Turbulent Transition of an Inlet Boundary Layer in a Circular Pipe Induced by Periodic Injection, --- Shape of Isolated Turbulent Patches and Their Growth ---, Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.79, No.797, 22-37, 2013. (Keyword) Pipe Flow / transition / boundary layer / Turbulence / Inlet Region / Isolated Turbulent Patch / Propagation Velocity / Turbulent Spot (Link to Publication Site) ● Publication site (DOI): 10.1299/kikaib.79.22 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1299/kikaib.79.22 (DOI: 10.1299/kikaib.79.22)
21.	Masashi Ichimiya and Ikuo Nakamura : Randomness Representation in Turbulent Flows with Kolmogorov Complexity(In Mixing Layer)), Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.78, No.788, 794-810, 2012. (Summary) The Kolmogorov complexity which measures the randomness were introduced. Numerical and graphic data in the mixing layer which was formed downstream of two-dimensional nozzle exit were compressed with the aid of a compression program. Approximated Kolmogorov complexity, AK, and normalized compression distance, NCD, were obtained. The AK indicated the regularity of the laminar flow and the randomness of the turbulent flow quantitatively. The NCD of the numerical value varied with data length. Between the same data, it approached zero, yet, on the other hand, between different data, it approached unity as the data length increased. The NCD of the numerical value in the natural transition process in the mixing layer increased monotonically downstream. Thus the NCD appears to be the measure of the transition process. (Keyword) turbulence / Randomness / Kolmogorov Complexity / Normalized Compression Distance / mixing layer (Link to Publication Site) ● Publication site (DOI): 10.1299/kikaib.78.794 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282681238812416 ● Search Scopus @ Elsevier (DOI): 10.1299/kikaib.78.794 (DOI: 10.1299/kikaib.78.794, CiNii: 1390282681238812416)
22.	Yoshifumi Jodai, Masashi Ichimiya and Hideo Osaka : Effects of Splitter Plates on Turbulent Quantities on a Boundary Layer Developing on a Flat Plate near the Trailing Edge, Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.77, No.783, 2133-2142, 2011. (Summary) An experimental investigation was made on a turbulent boundary layer near the trailing edge on a long flat plate with a blunt trailing edge. The flow was controlled by an additional splitter plate attached to the trailing edge along the wake center line. Measurement of fluctuating velocity was made under the freestream zero pressure gradient. Almost independent of the installation of the splitter plate, the turbulent intensity and the Reynolds shear stress in the inner layer decreased when approaching the trailing edge of the flat plate. The effect of the plate length on turbulent quantities was shown just upstream of the trailing edge upon close comparison, and was classified into two groups. The tendency of the turbulent energy production terms approaching the trailing edge coincided with the decrease in the streamwise turbulent intensity and in the Reynolds shear stress. (Keyword) turbulence / boundary layer / Separation / Splitter Plate / Turbulent Quantity (Link to Publication Site) ● Publication site (DOI): 10.1299/kikaib.77.2133 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282681240036608 ● Summary page in Scopus @ Elsevier: 2-s2.0-84859593801 (DOI: 10.1299/kikaib.77.2133, CiNii: 1390282681240036608, Elsevier: Scopus)
23.	Masashi Ichimiya, Hayato Fujimura and Junji Tamatani : Laminar-Turbulent Transition of an Inlet Boundary Layer in a Circular Pipe Induced by Periodic Ejection, --- Condition for Generating an Isolated Turbulent Patch ---, Journal of Fluid Science and Technology, Vol.6, No.6, 902-915, 2011. (Summary) The laminar-turbulent transition of a boundary layer induced by an ejection of jet in the inlet region of a circular pipe was experimentally investigated. The jet was periodically inserted radially from a small hole in the inlet region into the pipe flow. Axial velocity was monitored by a hot-wire anemometer. The difference of properties in laminar-turbulent transition from developed Hagen-Poiseuille flow was examined. Isolated turbulence patches were generated by the jets, and then they propagated downstream. The leading and traiking edges of the turbulent patch were similar to those of a turbulent spot in a flat-plate boundary layer. The threshold value of the jet flow rate to generate the turbulent patch decreased and saturated finally with the increase in jet duration. The normalized jet duration when the threshold value was saturated and the normalized threshold flow rate were different from those of the developed region. With the increase in jet flow rate beyond the threshold value, the duration of the turbulent patch increased, though the fluctuating velocity within the patch did not increase. The propagation velocities of the leading and trailing edges, the duration and fluctuating velocity within the turbulent patch were almost constant irrespective of the jet ejection frequency. (Keyword) pipe flow / transition / boundary layer / Turbulence / Inlet Region / Isolated Turbulent Patch / Threshold Value (Link to Publication Site) ● Publication site (DOI): 10.1299/jfst.6.902 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390001205246716800 ● Search Scopus @ Elsevier (DOI): 10.1299/jfst.6.902 (DOI: 10.1299/jfst.6.902, CiNii: 1390001205246716800)
24.	Masashi Ichimiya, Toshihiro Kato and : Effect of Local Periodic Disturbance on Mixing Layer at Exit of Two-Dimensional Jet, Journal of Fluid Science and Technology, Vol.6, No.6, 887-901, 2011. (Summary) The laminar-turbulent transition of a mixing layer induced by oscillating flat plates at an exit of a two-dimensional nozzle was experimentally investigated. The plates oscillated vertically in relation to the mean flow. The oscillation frequency was two orders of magnitude smaller than the fundamental frequency of the velocity fluctuation. The oscillation was found to be effective in enhancing the mixing. The disturbance traveled downstream as the convective instability, though it was damped only far downstream. The downstream development rate of fluctuating velocity in the normal component was larger than that in the streamwise one. Streamwise variation of the fluctuating velocity and fluctuating energy production and convection rates, which contribute to the velocity, were examined. The streamwise variation in the streamwise component did not correspond to that of the normal component. (Keyword) mixing layer / transition / turbulence / jet / Oscillating Plate / Periodic Disturbance / Absolute and Convective Instability / Velocity Distribution (Link to Publication Site) ● Publication site (DOI): 10.1299/jfst.6.887 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282680223426816 ● Search Scopus @ Elsevier (DOI): 10.1299/jfst.6.887 (DOI: 10.1299/jfst.6.887, CiNii: 1390282680223426816)
25.	Masashi Ichimiya, Shinya Kamada, Akiyoshi Okajima and Takayuki Oosaki : Effect of Local Periodic Disturbance on Mixing Layer Downstream of Two-Dimensional Jet(Spatial Structure and Quantitative Representation of Laminar-Turbulent Transition Process), Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.77, No.779, 1457-1471, 2011. (Summary) The laminar-turbulent transition of a mixing layer induced by oscillating flat plates at an exit of a two-dimensional nozzle was experimentally investigated. The plates oscillated vertically in relation to the mean flow. The oscillation frequency was two orders of magnitude smaller than the fundamental frequency of the velocity fluctuation. In the oscillating state, the same phenomenon as in the natural transition process appeared more upstream. In the early stage within the nonlinear region, the growth of fluctuating velocity attenuated and the Reynolds shear stress component decreased. The decrease in their production rate due to the expansion of the mixing layer contributed to the attenuation and decrease. The randomness factor appeared to be a reasonable indicator of the present transition process, especially in the process in which the periodic velocity fluctuation became irregular. However, this factor certainly indicated the same value at two streamwise positions. (Keyword) mixing layer / transition / Turbulence / jet / Shear Flow / Oscillating Plate / Periodic Disturbance / Nonlinear Region / Randomness Factor (Link to Publication Site) ● Publication site (DOI): 10.1299/kikaib.77.1457 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282681238336768 ● Search Scopus @ Elsevier (DOI): 10.1299/kikaib.77.1457 (DOI: 10.1299/kikaib.77.1457, CiNii: 1390282681238336768)
26.	Yoshifumi Jodai, Masashi Ichimiya and Hideo Osaka : Effects of Splitter Plates on Turbulent Quantities on a Boundary Layer Developing on a Flat Plate near the Trailing Edge, Journal of Fluid Science and Technology, Vol.6, No.4, 587-597, 2011. (Summary) An experimental investigation was made on a turbulent boundary layer near the trailing edge on a long flat plate with a blunt trailing edge. The flow was controlled by an additional splitter plate attached to the trailing edge along the wake center line. Measurement of fluctuating velocity was made under the freestream zero pressure gradient. Almost independent of the installation of the splitter plate, the turbulent intensity and the Reynolds shear stress in the inner layer decreased when approaching the trailing edge of the flat plate. The effect of the plate length on turbulent quantities was shown just upstream of the trailing edge upon close comparison, and was classified into two groups. The tendency of the turbulent energy production terms approaching the trailing edge coincided with the decrease in the streamwise turbulent intensity and in the Reynolds shear stress. (Keyword) turbulence / boundary layer / Separation / Splitter Plate / Turbulent Quantity (Link to Publication Site) ● Publication site (DOI): 10.1299/jfst.6.587 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282680223001216 ● Search Scopus @ Elsevier (DOI): 10.1299/jfst.6.587 (DOI: 10.1299/jfst.6.587, CiNii: 1390282680223001216)
27.	Masashi Ichimiya, Toshihiro Kato and : 2次元噴流出口混合層に及ぼす局所周期撹乱の効果, Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.77, No.775, 424-436, 2011. (Summary) The laminar-turbulent transition of a mixing layer induced by oscillating flat plates at an exit of a two-dimensional nozzle was experimentally investigated. The plates oscillated vertically in relation to the mean flow. The oscillation frequency was two orders of magnitude smaller than the fundamental frequency of the velocity fluctuation. The oscillation was found to be effective in enhancing the mixing. The disturbance traveled downstream as the convective instability, though it was damped only far downstream. The downstream development rate of fluctuating velocity in the normal component was larger than that in the streamwise one. Streamwise variation of the fluctuating velocity and fluctuating energy production and convection rates, which contribute to the velocity, were examined. The streamwise variation in the streamwise component did not correspond to that of the normal component. (Keyword) mixing layer / transition / turbulence / jet / Oscillating Plate / Periodic Disturbance / Absolute and Convective Instability / Velocity Distribution (Link to Publication Site) ● Publication site (DOI): 10.1299/kikaib.77.424 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282681238279680 ● Search Scopus @ Elsevier (DOI): 10.1299/kikaib.77.424 (DOI: 10.1299/kikaib.77.424, CiNii: 1390282681238279680)
28.	Masashi Ichimiya, Hayato Fujimura and Junji Tamatani : Laminar-Turbulent Transition of an Inlet Boundary Layer in a Circular Pipe Induced by Periodic Ejection, --- Condition for Generating an Isolated Turbulent Patch) ---, Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.77, No.774, 214-226, 2011. (Keyword) Pipe Flow / transition / boundary layer / Turbulence / Inlet Region / Isolated Turbulent Patch / Threshold Value (Link to Publication Site) ● Publication site (DOI): 10.1299/kikaib.77.214 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-84859589211 (DOI: 10.1299/kikaib.77.214, Elsevier: Scopus)
29.	Takuji Nakashima, Makoto Tsubokura, Takahide Nouzawa, Takaki Nakamura and Masashi Ichimiya : Flow Structures above the Trunk Deck of Sedan-Type Vehicles and Their Influence on High-Speed Vehicle Stability 2nd report: Numerical Investigation on Simplified Vehicle Models using Large-Eddy Simulation, SAE International Journal of Passenger Cars - Mechanical Systems, Vol.2, No.1, 157-167, 2009. (Link to Publication Site) ● Publication site (DOI): 10.4271/2009-01-0006 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-77953211841 (DOI: 10.4271/2009-01-0006, Elsevier: Scopus)
30.	Yoshifumi Jodai, Yoshikazu Takahashi, Masashi Ichimiya and Hideo Osaka : The Effects of Splitter Plates on Turbulent Boundary Layer on a Long Flat Plate Near the Trailing Edge, Journal of Fluids Engineering - Transactions of the ASME, Vol.130, No.5, 051103-1-051103-7, 2008. (Summary) An experimental investigation has been made for a turbulent boundary layer near the trailing edge on a long flat plate. The flow was controlled by an additional splitter plate fitted to the trailing edge along the wake center line. The length of the splitter plate was varied from a half, to five times the trailing edge thickness. Measurements of base pressure behind the trailing edge and of mean velocity and pressure distribution in the turbulent boundary layer on the flat plate were made under the freestream zero-pressure gradient. The absolute value of base pressure coefficient of the long flat plate was considerably smaller than that of the short flat plate (bluff body) without splitter plate. A significant increase in the normalized base pressure coefficient (about 50% as same as short one) was achieved with the splitter plate fitted to the long flat plate. Within an inner layer in the turbulent boundary layer near the trailing edge, mean velocity increased than that in the upstream position, especially in the case without splitter plate. With splitter plate, however, the base pressure rise made mean velocity distribution come closer to that of fully developed turbulent boundary layer. (Keyword) turbulence / boundary layer / Separation / Splitter Plate / Base Pressure (Link to Publication Site) ● Publication site (DOI): 10.1115/1.2911683 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1115/1.2911683 (DOI: 10.1115/1.2911683)
31.	Yoshifumi Jodai, Yoshikazu Takahashi, Masashi Ichimiya and Hideo Osaka : 長平板背後の渦構造に及ぼすスプリッター板の影響, Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.73, No.729, 1183-1190, 2007. (Summary) 長い平板の後縁近傍の乱流境界層に関する実験的研究である．平板後縁中心線上にスプリッター板を設置した．スプリッター板長さと平板厚さの比を0.5から5まで変えた．零圧力勾配の下で，渦放出周波数，速度変動波形，渦形成領域，再付着点位置を検討した．長平板と短平板との差はスプリッター板がないときの渦放出周波数の著しい差として生じた．スプリッター板を設置すると渦放出周波数は短平板ほど顕著ではないがいずれのスプリッター板長さでも増加した．その渦放出周波数に及ぼすスプリッター板の効果を調べ説明した． (Keyword) Vortex / Wake / Separation / Turbulence / Splitter Plate / Strouhal Number (Link to Publication Site) ● Publication site (DOI): 10.1299/kikaib.73.1183 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1520290882323342336 ● Summary page in Scopus @ Elsevier: 2-s2.0-34547442360 (DOI: 10.1299/kikaib.73.1183, CiNii: 1520290882323342336, Elsevier: Scopus)
32.	Masashi Ichimiya, Tomohiro Abe, Junichiro Fukutomi and Masaharu Kondo : Laminar-Turbulent Transition of a Boundary Layer Induced by a Single Roughness Element in an Inlet Region of a Circular Pipe Flow, Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.73, No.725, 154-161, 2007. (Summary) 円管助走部境界層の乱流遷移に関する実験的研究である．単一突起を設置することによって下流に形成される定常な乱流領域の平均·変動速度を熱線風速計を用いて測定した．乱流領域の輪郭線は平面に展開するとくさび形である．くさびの頂点は突起位置に一致し，突起直後は直線であるが，次第に外側に向かって曲がる．これは平板上の乱流くさびと同様である．また広がり角も，同程度のレイノルズ数における平板上の乱流くさびと同程度である．乱流領域内の速度変動は中心線上で最大にはならず，周囲の層流領域との界面で最大になる．そこでの乱流領域内部の速度変動は乱流領域中心部よりも大きい． (Keyword) pipe flow / transition / boundary layer / turbulence / Single Roughness Element / Inlet Region (Link to Publication Site) ● Publication site (DOI): 10.1299/kikaib.73.154 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1520290882220013952 ● Summary page in Scopus @ Elsevier: 2-s2.0-34248329613 (DOI: 10.1299/kikaib.73.154, CiNii: 1520290882220013952, Elsevier: Scopus)
33.	Yoshifumi Jodai, Yoshikazu Takahashi, Masashi Ichimiya and Hideo Osaka : 平板後縁近傍乱流境界層の発達に及ぼすスプリッター板の影響, Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.72, No.719, 1735-1742, 2006. (Summary) 長い平板の後縁近傍の乱流境界層に関する実験的研究である．平板後縁中心線上にスプリッター板を設置した．スプリッター板長さと平板厚さの比を0.5から5まで変えた．零圧力勾配の下で，背圧，平均速度，圧力分布を測定した．スプリッター板がないときの背圧係数は短い平板のそれよりも小さかった．スプリッター板を設置すると背圧は約50%回復した．平板後縁近傍の乱流境界層は，スプリッター板がないときは加速したがスプリッター板を設置するとこの加速は緩和され加速される領域も縮小した． (Keyword) Turbulence / Boundary Layer / Separation / Splitter Plate / Base Pressure (Link to Publication Site) ● Publication site (DOI): 10.1299/kikaib.72.1735 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1520290882736421888 ● Summary page in Scopus @ Elsevier: 2-s2.0-33749579901 (DOI: 10.1299/kikaib.72.1735, CiNii: 1520290882736421888, Elsevier: Scopus)
34.	Masashi Ichimiya, Yoshiyuki Nakase, Junichiro Fukutomi, Seiichirou Kondou and Isao Tsutsui : Properties of a Turbulence Wedge Which Develops from a Single Roughness Element in a Flat Plate Laminar Boundary Layer, Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.67, No.660, 1983-1989, 2001. (Summary) A turbulence wedge that develops downstream from a single roughness element placed in a laminar boundary layer on a flat plate was experimentally investigated. Streamwise vortices, development mechanisms of the wedge in the wall-normal and spanwise directions and development process of the turbulent quantities in the downstream were clarified. Many streamwise vortices appear within the wedge just behind the roughness. Further downstream, on the other hand, a pair of streamwise vortices are found on both interfaces between the wedge and the outer laminar region. The development mechanism of the wedge in the spanwise direction may be governed by the streamwise vortices ; the mechanism in the spanwise direction is different from that in the wall-normal direction. The fluctuating velocities and the Reynolds stresses just behind the roughness are larger than those of the developed turbulent boundary layer because of the many streamwise vortices. Further downstream, they more closely resemble those in the developed turbulent boundary layer. (Keyword) Turbulence / Boundary Layer / Transition / Single Roughness Element / Turbulence Wedge / Streamwise Vortex / Vorticity (Link to Publication Site) ● Publication site (DOI): 10.1299/kikaib.67.1983 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282681159542400 ● Summary page in Scopus @ Elsevier: 2-s2.0-34249333145 (DOI: 10.1299/kikaib.67.1983, CiNii: 1390282681159542400, Elsevier: Scopus)
35.	Yuji Okita, Kyozo Ayukawa, Katsutaka Nakamura, Masashi Ichimiya and Yoshiyuki Nakase : The Flow over in Inclined Fence in a Turbulent Boundary Layer, Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.67, No.655, 645-650, 2001. (Summary) The purpose of this paper is to study in detail the flow over an inclined fence in a turbulent boundary layer, as basic research which issues from promoting heat transfer and the decrease of the pressure drop. The fence height h set in a turbulent boundary layer is 3 mm (u_τh/ν≒75, u_τ : friction velocity, ν : kinematic viscosity) and setting angle of a fence is 20° in the free stream direction. The time averaged velocity profiles in the downstream of the fence ware measured by using a 3-hole pitot tube. We investigated velocity profiles by utilizing polar diagram, logarithmic velocity distributions and velocity defect law. Consequently, It was found that the spanwise velocity profiles are cross-over profiles. We clarified the relaxation process from streamwise direction velocity. Further we investigated in detail the flow direction on the wall which shows the wall shear direction by the oil flow visualization. (Keyword) Turbulent Flow / Boundary Layer / Three-Dimensional Flow / Inclined Fence / Relaxation Process (Link to Publication Site) ● Publication site (DOI): 10.1299/kikaib.67.645 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282681161226752 ● Summary page in Scopus @ Elsevier: 2-s2.0-33845928596 (DOI: 10.1299/kikaib.67.645, CiNii: 1390282681161226752, Elsevier: Scopus)
36.	Masashi Ichimiya, Ikuo Nakamura and Shintaro Yamashita : Properties of a Relaminarizing Turbulent Boundary Layer under a Favorable Pressure Gradient, Experimental Thermal and Fluid Science, Vol.17, No.1-2, 37-48, 1998. (Summary) Behavior of the turbulent boundary layer on a flat plate in a relaminarization process with flow acceleration due to a convergenceof the sectional area is experimentally investigated. Statistical properties are measured and the turbulent structure is examined in detail. The bursting phenomena are also investigated. In the relaminarization process, low-amplitude fluctuating portions appear intermittently in the velocity signal. In the relaminarization process, vorticity increases in a large eddy and decreases in a small one. The small eddies become large, and the contribution from the high wave number decreases. It is considered that the relaminarization changes the ejection and sweep, though it does not particularly attenuate the bursting in the inner layer. This phenomenon is qualitatively explained with the aid of the mean velocity profiles and mixing length concept. (Keyword) turbulence / boundary layer / relaminarization / Statistical Properties / Bursting / Mixing length
37.	Junichiro Fukutomi, Yoshiyuki Nakase, Masashi Ichimiya and 篠原善哉 : 入口案内羽根による貫流ファンの高性能化に関する研究, Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.64, No.618, 442-446, 1998. (Summary) 高圧力係数を持つ貫流ファンを開発するため入口案内羽根が内部流れや，ファン性能に及ぼす影響を検討した．入口案内羽根によって流入流れを制御し，回転と逆方向の適切な予旋回を与えれば入口案内羽根がないものと比べて高い圧力係数が得られるとともに，高効率が得られることを示した．
38.	Masashi Ichimiya, Yoshiyuki Nakase, Ikuo Nakamura, Shintaro Yamashita, Junichiro Fukutomi and Mikio Yoshikawa : 順圧力こう配下の再層流化乱流境界層の特性, Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.62, No.594, 483-490, 1996. (Summary) 乱流境界層の再層流化に関する実験的研究である．この再層流化は流れを縮小させて順圧力勾配を加えることによって行った．境界層内の平均·変動速度を熱線風速計とI型熱線プローブを用いて測定し，VITA法を用いてバースト構造について考察した．再層流化は乱流境界層の外層部分から発生するという従来の推測が支持される結果を得た．また再層流化するとバーストの発生は減少する．しかしこの周波数をテイラー微小時間で無次元化すると圧力勾配にかかわらず一定になる．再層流化は境界層内層のバーストを特別には弱めないが，イジェクション，スイープには変化を及ぼすことが混合距離を用いた考察から示された．
39.	Junichiro Fukutomi, Yoshiyuki Nakase, Masashi Ichimiya and Hiroto Ebisu : Unsteady Fluid Forces on a Blade in a Cross-Flow Turbine, JSME International Journal, Series B: Fluids and Thermal Engineering, Vol.38, No.3, 404-410, 1995. (Summary) The experimental and theoretical studies for determination on fluid forces on the blade in a cross-flow turbine are conducted. In the experiment, the tangential and radial forces are measured. In the theoretical study, they are calculated numerically using the unsteady momentum theory. The calculated results are compared with experimental data and good agreement between them is demonstrated. Furthermore, the maximum forces are found to occur immediately before the blade leaves the nozzle exit in both the experimental and theoretical results.
40.	Masashi Ichimiya, Yoshiyuki Nakase, Junichiro Fukutomi and Shinya Fujii : 順圧力こう配下の再層流化乱流境界層の特性, Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.61, No.584, 1264-1271, 1995. (Summary) 乱流境界層の再層流化に関する実験的研究である．この再層流化は流れを縮小させて順圧力勾配を加えることによって行った．境界層内の平均·変動速度を熱線風速計とI型熱線プローブを用いて測定し，速度分布，乱流統計量について考察した．また変動速度の確率密度関数の形状の変化をK-Lダイバージェンスを用いて定量的に説明した．再層流化は乱流境界層の外層部分から発生するという従来の推測が支持される結果を得た．再層流化過程では，乱流領域の境界層内に占める割合が減少し，渦塊は大型化して高周波成分の寄与が減少する．
41.	Junichiro Fukutomi, Yoshiyuki Nakase, Masashi Ichimiya and 織野明弘 : 往復流におけるクロスフロー形波力水車の作動特性, Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.61, No.582, 572-578, 1995. (Summary) 対称形クロスフロー水車を用いた波力水車について往復流中の水車性能に及ぼす羽根車の慣性モーメントの影響を実験的に明らかにした．さらに本水車の相似則を考慮した運動方程式を導き，定常特性を準定常的に用いたシミュレーションによって慣性モーメントが変化した場合にも往復流中の回転数，効率などの作動特性を評価できることを示した．
42.	Junichiro Fukutomi, Yoshiyuki Nakase, Masashi Ichimiya and 矢野浩 : 波力水車の運転特性に関する研究, Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.59, No.563, 2221-2226, 1993. (Summary) 対称形クロスフロー水車を用いた波力水車について上下往復流中の水車性能に及ぼすケーシング形状の影響を調べるとともに，一方向流中の定常特性を準定常的に用いて本水車の動特性のシミュレーションを行い，回転数，効率などの作動特性を評価できることを示した．
43.	Junichiro Fukutomi, Yoshiyuki Nakase, Masashi Ichimiya and 戎弘人 : クロスフロー水車の羽根に働く流体力, Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.59, No.561, 1640-1645, 1993. (Summary) クロスフロー水車の羽根に働く非定常な流体力をひずみゲージ，スリップリングを用いて実験的に求めるとともに運動量法則を用いて数値解析を行い，計算値は実験とかなり良く一致すること，接線方向力，半径方向力ともに羽根がノズル出口の噴流から脱出するノズル先端近傍で最大値を示すことを明らかにした．
44.	Masashi Ichimiya, Yoshiyuki Nakase, Junichiro Fukutomi, Katsumi Yamana and Masaaki Fukunaga : 平板上の突起より発達する乱流くさびの構造の研究, Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.59, No.557, 129-136, 1993. (Summary) 層流境界層の乱流遷移に関する実験的研究である．この遷移は3次元突起列によって強制的に生じさせるものである．層流境界層内に単一の3次元突起が存在すると，その下流にくさび形の乱流領域(乱流くさび)が形成される．この乱流くさび領域の平均·変動速度を熱線風速計とI型熱線プローブを用いて測定し，くさびの輪郭線や広がり角度を明確な定義に基づいて示した．また平均量は突起直後では十分発達しておらず，下流に向かって徐々に発達することが明らかになった．
45.	Junichiro Fukutomi, Yoshiyuki Nakase and Masashi Ichimiya : 多板式層流ファンに関する研究, Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.58, No.549, 1473-1478, 1992. (Summary) 低騒音であることが期待されるが，効率が低い多板式層流ファンの性能向上を目的としてスクロール広がり角の影響を検討した．本ファンは羽根車出口流れ角が極端に小さく，かつ流速が大きいため広がり角が1，2°の小さいスクロールを用いればスクロール流入時の減速損失が減少し，効率は増大するが，最高効率点が小流量側へ移動することを示した．
46.	Shintaro Yamashita, Masashi Ichimiya and Ikuo Nakamura : 軸流中の回転円筒上の境界層に及ぼす単一突起の影響, Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.56, No.532, 3688-3695, 1990. (Summary) 一様な軸流中で回転する円筒上に設置した単一突起の下流に発達する乱流領域の流れについて乱流·非乱流の識別を行い，これによって条件を付けた平均·変動速度を円筒の一回転を一事象とするアンサンブルへ平均を求めた．周方向平均速度の周方向分布は非乱流平均値が先行側界面と後続側界面ではくさび外の速度に相対的にそれぞれ正負の値をとる．乱流くさび界面における縦渦を乱流平均·非乱流平均に分けて示すことにより，縦渦構成成分はほとんど乱流であることが示された．
47.	Shintaro Yamashita, Masashi Ichimiya, Ikuo Nakamura and Kunihiro Ogiwara : 軸流中の回転円筒上の境界層に及ぼす単一突起の影響, Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.56, No.525, 1348-1356, 1990. (Summary) 軸流中の回転円筒上の単一突起による乱流遷移に関する実験的研究である．単一突起下流に発生する乱流くさび内の速度を熱線風速計によって測定した．円筒の回転速度を変化させ，アンサンブル平均を求めてた．乱流くさび内の軸方向平均速度分布は，相対主流方向を中心としてほぼ対称的な分布を示した．コリオリ力は乱流くさびの非対称性には寄与するが，その程度は本実験の範囲ではくさびの広がりに現れるほど大きくない．
48.	Shintaro Yamashita, Masashi Ichimiya and Ikuo Nakamura : 軸流中の静止および回転円筒上の境界層に及ぼす単一突起の影響, Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.53, No.488, 1167-1175, 1987. (Summary) 軸流中の静止及び回転円筒上の単一突起による乱流遷移に関する実験的研究である．単一突起下流に発生する乱流くさび内の速度を熱線風速計によって測定した．乱流くさびと外側の層流との界面に存在する縦渦がくさびの発達に本質的な役割を果たすことが明らかにされた．平均速度ベクトルはくさびの内·外及びくさび内部において，その大きさ，方向とも大きく変化し，その特徴を極線図で示すことができた．円筒回転時における乱流くさび領域は円筒に巻きつくねじれたものであるが，円筒とともに回転する系から見て，平面に展開すると下流に向かってほぼ直線的に増加した．

Academic Paper (Unrefereed Paper):

1.	Masashi Ichimiya : A New Measure for the Laminar-Turbulent Transition Process in Free-Shear Flows, Journal of Japan Society of Fluid Mechanics, Vol.32, No.6, 413-416, 2013. (Summary) ランダムさを表現する測度であるコルモゴロフ複雑さを紹介した．そして2次元ノズル出口下流に形成される混合層の乱流遷移過程の数値データや画像データを圧縮した．近似コルモゴロフ複雑さAKや正規化圧縮距離NCDを求めた．AKは層流の規則性や乱流のランダムさを定量的に表示することができる．数値データのNCDはデータ個数によって変化し，データ個数が多いほど同一データ間のNCDは0に近づき，異なるデータ間のNCDは1に近づく．混合層の自然遷移過程における数値データのNCDは下流方向に単調に変化して，遷移進行の測度となり得る． (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1520290883258281216 (CiNii: 1520290883258281216)

Review, Commentary:

1.	Masashi Ichimiya : 機械工学年鑑2020，6・7乱流遷移, Journal of the Japan Society of Mechanical Engineers, Vol.123, No.1220, Jul. 2020.
2.	Masashi Ichimiya : 機械工学年鑑，7・3遷移乱流，7・3・1非圧縮性, Journal of the Japan Society of Mechanical Engineers, Vol.107, No.1029, 608, Aug. 2004.
3.	林農 and Masashi Ichimiya : 機械工学年鑑，2非圧縮流れ，2・2境界層, Transactions of The Japan Society of Mechanical Engineers, Series B, Vol.62, No.600, 2910, Aug. 1996.

Proceeding of International Conference:

1.	MASAKO Jige, Masashi Ichimiya and IKUO Nakamura : Information Analysis of Spatiotemporal Structure in Relaminarizing Turbulent Boundary Layer (Velocity Difference in Spanwise Direction), Proceedings of the 33rd International Symposium on Transport Phenomena, Kumamoto, Sep. 2023.
2.	MASAKO Jige and Masashi Ichimiya : Analysis of Unsteady Random Data of Turbulent Chaotic Motion Using Information Entropy, Proceedings of ASME-JSME-KSME Joint Fluids Engineering Conference 2023, Osaka, Jul. 2023.
3.	MASAKO Jige, Masashi Ichimiya and Ikuo Nakamura : Analysis of Relaminarizing Turbulent Boundary Layer with Various Information Measures, Proceedings of 23rd Australasian Fluid Mechanics Conference, Sydney, Dec. 2022.
4.	Yugo Tabuchi, Masashi Ichimiya and Ikuo Nakamura : Analysis of Relaminarizing Turbulent Boundary Layer with Kolmogorov Complexity, Proceedings of 23rd Australasian Fluid Mechanics Conference, Sydney, Dec. 2022.
5.	Masashi Ichimiya and Ikuo Nakamura : Relaminarization of Accelerated Turbulent Boundary Layer under Favorable Pressure Gradient, Proceedings of 23rd Australasian Fluid Mechanics Conference, Sydney, Dec. 2022.
6.	Masako Jige and Masashi Ichimiya : Information Analysis of Relaminarizing Turbulent Boundary Layer, Proceedings of the 8th International Forum on Advanced Technologies 2022 (IFAT2022), Online, Mar. 2022.
7.	Yugo Tabuchi and Masashi Ichimiya : Kolmogorov complexity analysis of relaminarizing turbulent boundary layer, Proceedings of the 8th International Forum on Advanced Technologies 2022 (IFAT2022), Online, Mar. 2022.
8.	Takumi Masuda and Masashi Ichimiya : The Laminar-Turbulent Transition in a Two-Dimensional Mixing Layer by the Local Periodic Disturbance (Effect of disturbance mode), Proceedings of the 8th International Forum on Advanced Technologies 2022 (IFAT2022), Online, Mar. 2022.
9.	Keisuke Inoue and Masashi Ichimiya : Growth Process of Turbulent Patches due to Forced Disturbance in the Developing Region in the Circle Pipe, Proceedings of the 8th International Forum on Advanced Technologies 2022 (IFAT2022), Online, Mar. 2022.
10.	Ryotaroh Nakatsu and Masashi Ichimiya : Laminar-Turbulent Transition in an Inlet Region of a Circular Pipe Induced by the Jet Disturbance, Proceedings of 20th Australasian Fluid Mechanics Conference, Perth, Australia, Dec. 2016. (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85084012140 (Elsevier: Scopus)
11.	Masashi Ichimiya and Ikuo Nakamura : Randomness Representation with Kolmogorov Complexity in Laminar-Turbulent Transition Process of Mixing Layer, Proceedings of 20th Australasian Fluid Mechanics Conference, Perth, Australia, Dec. 2016.
12.	Aiyuki Hanamitsu and Masashi Ichimiya : Effect of the Interference of Turbulence Wedges due to Roughness Elements on the Flat-Plate Boundary-Layer Transition, Proceedings of International Forum on Advanced Technologies, IFAT2015, 119-121, Tokushima, Mar. 2015.
13.	Atsuki Matsubara and Masashi Ichimiya : Laminar-Turbulent Transition in a Two-Dimensional Mixing Layer by the Low-Frequency Disturbance, Proceedings of International Forum on Advanced Technologies, IFAT2015, 95-97, Tokushima, Mar. 2015.
14.	Takuya Kawasumi and Masashi Ichimiya : Laminar-Turbulent Transition of the Flat-Plate Boundary Layer by a Line of Roughness Elements, Proceedings of International Forum on Advanced Technologies, IFAT2015, 89-91, Tokushima, Mar. 2015.
15.	Kazuhiro Tamura and Masashi Ichimiya : Laminar-Turbulent Transition in a Circular Pipe by the Jet Disturbance, Proceedings of International Forum on Advanced Technologies, IFAT2015, 92-94, Tokushima, Mar. 2015.
16.	Tomoki Inoue and Masashi Ichimiya : Laminar-Turbulent Transition of the Flat-Plate Boundary Layer by a Line of Roughness Elements (Variation of Turbulence Energy Due to Interference of Turbulence Wedges), Proceedings of 4th International Conference on Jets, Wakes and Separated Flows, Nagoya, Sep. 2013.
17.	Masashi Ichimiya : A New Measure for the Laminar-Turbulent Transition Process in Free-Shear Flows, Proceedings of 4th International Conference on Jets, Wakes and Separated Flows, Nagoya, Sep. 2013.
18.	Takeshi Oohara and Masashi Ichimiya : Properties of the Laminar-Turbulent Transition in a Two-Dimensional Mixing Layer by the Low-Frequency Disturbance, Proceedings of 4th International Conference on Jets, Wakes and Separated Flows, Nagoya, Sep. 2013.
19.	Takafumi Izawa and Masashi Ichimiya : Condition for Generating an Isolated Turbulent Patch at an Inlet Boundary Layer in a Circular Pipe Induced by Periodic Injection, Proceedings of 4th International Conference on Jets, Wakes and Separated Flows, Nagoya, Sep. 2013.
20.	Masashi Ichimiya and Yasushi Fujiwara : Laminar-Turbulent Transition of the Flat-Plate Boundary Layer by a Line of Roughness Elements (Development of Turbulent Quantities within Turbulence Wedges), Proceedings of 17th Australasian Fluid Mechanics Conference, Auckland, Dec. 2010.
21.	Masashi Ichimiya and Shinya Kamada : Progress of Laminar-Turbulent Transition in a Two-Dimensional Mixing Layer (Quantitative Representation of Transition Process), Proceedings of 17th Australasian Fluid Mechanics Conference, Auckland, Dec. 2010.
22.	Yoshifumi Jodai, Masashi Ichimiya and Hideo Osaka : The Effects of Splitter Plates on a Turbulent Boundary Layer Developing on a Flat Plate near the Trailing Edge (Turbulent Flow Measurements), Proceedings of the 3rd International Conference on Jets, Wakes and Separated Flows, Marriott Kingsgate Conference Center, Cincinnati, Ohio, USA, Sep. 2010.
23.	Takuji Nakashima, Makoto Tsubokura, Takahide Nouzawa, Takaki Nakamura and Masashi Ichimiya : Flow structures above the trunk deck of sedan-type vehicles and their influence on high-speed vehicle stability 2nd report: Numerical investigation on simplified vehicle models using Large-Eddy Simulation, Proceedings of 2009 SAE Congress, SP-2226 Vehicle Aerodynamics, 2009, 79-89, Cobo Center, Detroit MI, USA, Apr. 2009.
24.	Yoshifumi Jodai, Yoshikazu Takahashi, Masashi Ichimiya and Hideo Osaka : Influence of the Wake Splitter Plate on the Vortex Structure behind a Long Flat Plate with a Blunt Trailing Edge, Proceedings of the 2nd International Conference on Jets, Wakes and Separated Flows, Technical University Berlin, Berlin, Germany, Sep. 2008.
25.	Masashi Ichimiya : Effects of Oscillating Plates on the Plane Mixing Layer, Its Developing Region and Jet, Proceedings of 16th Australasian Fluid Mechanics Conference, 138, Crown Plaza, Gold Coast, Australia, Dec. 2007. (Summary) 長方形ノズルから静止流体中に放出される噴流の乱流遷移について実験を行った．ノズル直後の混合層，その発達過程及び発達噴流の各領域を研究した．ノズル出口に薄い板を設置して，それを流れに垂直に振動させた．振動板により噴流の広がりは促進される．噴流直後の速度変動の大きさは増加する．しかし発達噴流の速度変動には変化はないことが明らかになった．
26.	Yoshifumi Jodai, Yoshikazu Takahashi, Masashi Ichimiya and hideo Osaka : The Effects of Splitter Plates on Turbulent Boundary Layer on a Long Flat Plate near the Trailing Edge, Proceedings of 5th Joint ASME/JSME Fluids Engineerig Conference, Sheraton San Diego Hotel & Marina, San Diego, CA, USA, Aug. 2007.
27.	Masashi Ichimiya : Laminar-Turbulent Transition of a Boundary Layer by a Single Roughness Element in an Inlet Region of a Circular Pipe, Proceedings of 15th Australasian Fluid Mechanics Conference, University of Sydney, Sydney, Australia, Dec. 2004. (Summary) 円管助走部内層流境界層の単一突起による乱流遷移について実験を行った．単一突起下流には定常な乱流領域が形成される．その形状は平面状に展開するとくさび形である．その乱流領域内では，突起中心線上よりも少し周方向に離れた位置の方が乱れは大きい．乱流領域と周囲の領域との間は間欠的な乱流領域であり，孤立した乱流塊が存在するが，その中の変動はとても大きいことが明らかになった．
28.	Jun Sugihara, Masashi Ichimiya and Yoshiyuki Nakase : Properties of Two-Dimensional Jet with Small Disturbance, Proceedings of the 5th JSME-KSME Fluids Engineering Conference, 210, Nagoya, Nov. 2002. (Summary) 長方形噴流の出口に振動版を設置して流れに垂直に振動させたときの噴流の特性を実験した．板の振動により，乱流は促進され，噴流の広がりは促進された．
29.	Masashi Ichimiya and Chihiro Sudo : Interaction between Turbulence Wedges which Develop from Roughness Row in a Flat Plate Laminar Boundary Layer, Proceedings of 14th Australasian Fluid Mechanics Conference, Vol.1, 207-210, Adelaide University, Adelaide, Australia, Dec. 2001. (Summary) 層流境界層内に3次元突起列が存在すると，その下流に乱流くさびが衝突·干渉する．ちょうどこの衝突の上流·衝突付近·衝突下流の3領域の平均·変動速度を熱線風速計とI,V,X型熱線プローブを用いて測定した．突起列から生じた乱流くさびは，単一突起から生じた乱流くさびと流れ方向にも壁に垂直方向にも広がり方はほぼ同じであった．くさび内の縦渦の個数は突起列の方が多かった．突起列から生じた縦渦のスケールの方が小さい．そのために境界層厚さも突起列の方が薄い．平均渦度は突起列から生じた乱流くさび内の方が大きかった．二つの乱流くさびの相互作用により，変動が増加し，乱流化が促進されている．渦度もそこで増加した．縦渦はどの流れ方向位置でもほぼ同じ横方向位置に存在した．最も外側の縦渦の渦度は下流において新たな縦渦が外側に生じるまで増加し，内側の縦渦の渦度は下流に行くに従って減少した．
30.	Yuji Okita, Kyozo Ayukawa, Katsutaka Nakamura, Masashi Ichimiya and Yoshiyuki Nakase : The Flow over an Inclined Small Fence in a Turbulent Boundary Layer, Proceedings of the 4th JSME-KSME Thermal Engineering Conference, Vol.2, 461-465, Kobe, Oct. 2000. (Summary) 平板上に設置された傾斜フェンス下流の流れについて熱線風速計によって平均速度の測定を行い，流れ場の基本現象の解明を試みた．フェンスによって横方向速度を生じるねじれた三次元境界層になることが明らかになった．そのねじれは正負が同程度ではないことも示された．また限界流線角度や剥離領域を流れの可視化によって特定した．
31.	Masashi Ichimiya : Laminar-Turbulent Transition by a Single Roughness Element on a Flat Plate, Proceedings of 3rd ASME/JSME Joint Fluids Engineering Conference, San Francisco, Jul. 1999. (Summary) 層流境界層の乱流遷移に関する実験的研究である．この遷移は3次元突起列によって強制的に生じさせるものである．層流境界層内に単一の3次元突起が存在すると，その下流にくさび形の乱流領域(乱流くさび)が形成される．この乱流くさび領域の平均·変動速度を熱線風速計とI型熱線プローブを用いて測定し，くさびの輪郭線や広がり角度を明確な定義に基づいて示した．また平均量は突起直後では十分発達しておらず，下流に向かって徐々に発達することが明らかになった．
32.	Masashi Ichimiya : The Effect of a Single Roughness Element on a Flat Plate Boundary Layer Transition, Engineering Turbulence Modelling and Experiments 4, 597-606, Corsica, France, May 1999. (Summary) 層流境界層の乱流遷移に関する実験的研究である．乱流くさび領域の平均·変動速度を熱線風速計とV型，X型熱線プローブを用いて測定した．突起直後の断面においてはくさび内に多数の縦渦が存在し，突起からある程度下流に進んだ断面内においては，くさびと周囲の層流領域との界面に一対の縦渦が存在した．下流に行くに従って乱流が発達することが示された．
33.	Masashi Ichimiya, Bruce R. Pearson and Robart A. Antonia : Effect of Suction on a Laminar Boundary Layer, Proceedings of 13th Australasian Fluid Mechanics Conference, Vol.1, 545-548, Monash University, Melbourne, Australia, Dec. 1998. (Summary) 層流境界層に壁面吸い込みを作用させたときの境界層内の速度分布の変化とその回復について，計算および実験を行った．計算はNavier-Stokes方程式中のすべての項を取り入れて行った．速度，表面摩擦係数，形状係数などの分布について，計算と実験はよく一致した．
34.	Masashi Ichimiya, Ikuo Nakamura and Shintaro Yamashita : Properties of Relaminarizing Turbulent Boundary Layer under a Favorable Pressure Gradient, --- Analysis of Bursting Structure with VITA Technique ---, Engineering Turbulence Modelling and Experiments 3, 431-440, Heraklion-Crete, Greece, May 1996. (Summary) 乱流境界層の再層流化に関する実験的研究である．この再層流化は流れを縮小させて順圧力勾配を加えることによって行った．境界層内の平均·変動速度を熱線風速計とI型熱線プローブを用いて測定し，VITA法を用いてバースト構造について考察した．再層流化は乱流境界層の外層部分から発生するという従来の推測が支持される結果を得た．また再層流化するとバーストの発生は減少する．しかしこの周波数をテイラー微小時間で無次元化すると圧力勾配にかかわらず一定になる．再層流化は境界層内層のバーストを特別には弱めないが，イジェクション，スイープには変化を及ぼすことが混合距離を用いた考察から示された．
35.	Masashi Ichimiya : Properties in a Relaminarizing Turbulent Boundary Layer under a Favorable Pressure Gradient, Proceedings of 10th Symposium on Turbulent Shear Flows, Vol.1, 117-1112, The Pennsylvania State University, PA, USA, Aug. 1995. (Summary) 乱流境界層の再層流化に関する実験的研究である．この再層流化は流れを縮小させて順圧力勾配を加えることによって行った．境界層内の平均·変動速度を熱線風速計とI型熱線プローブを用いて測定し，速度分布，乱流統計量について考察した．また変動速度の確率密度関数の形状の変化をK-Lダイバージェンスを用いて定量的に説明した．再層流化は乱流境界層の外層部分から発生するという従来の推測が支持される結果を得た．再層流化過程では，乱流領域の境界層内に占める割合が減少し，渦塊は大型化して高周波成分の寄与が減少する．
36.	Masashi Ichimiya, Yoshiyuki Nakase and Junichiro Fukutomi : Structure of a Turbulence Wedge Developed from a Single Roughness Element on a Flat Plate, Engineering Turbulence Modelling and Experiments 2, 613-622, Florence, Italy, Jun. 1993. (Summary) 層流境界層の乱流遷移に関する実験的研究である．この遷移は3次元突起列によって強制的に生じさせるものである．層流境界層内に単一の3次元突起が存在すると，その下流にくさび形の乱流領域(乱流くさび)が形成される．この乱流くさび領域の平均·変動速度を熱線風速計とI型熱線プローブを用いて測定し，くさびの輪郭線や広がり角度を明確な定義に基づいて示した．また平均量は突起直後では十分発達しておらず，下流に向かって徐々に発達することが明らかになった．
37.	Shintaro Yamashita, Masashi Ichimiya and Ikuo Nakamura : The Effect of a Single Protrusion on the Boundary Layer Around a Cylinder Rotating in an Axial Flow, --- Conditional Measurement in the Intermittent Region of a Turbulence Wedge ---, Proceedings of 11th Australasian Fluid Mechanics Conference, Vol.1, 231-234, University of Tasmania, Hobart, Australia, Dec. 1992. (Summary) 一様な軸流中で回転する円筒上に設置した単一突起の下流に発達する乱流領域の流れについて乱流·非乱流の識別を行い，これによって条件を付けた平均·変動速度を円筒の一回転を一事象とするアンサンブルへ平均を求めた．周方向平均速度の周方向分布は非乱流平均値が先行側界面と後続側界面ではくさび外の速度に相対的にそれぞれ正負の値をとる．乱流くさび界面における縦渦を乱流平均·非乱流平均に分けて示すことにより，縦渦構成成分はほとんど乱流であることが示された．
38.	Shintaro Yamashita, Masashi Ichimiya, Ikuo Nakamura and Kunihiro Ogiwara : Effects of a Single Protrusion on the Boundary Layer Around a Cylinder Rotating in an Axial Flow, --- Change in Flow Properties in the Turbulence Wedge with the Speed Ratio ---, Proceedings of the 2nd KSME-JSME Fluids Engineering Conference, Vol.1, 190-195, Seoul, Oct. 1990. (Summary) 軸流中の回転円筒上の単一突起による乱流遷移に関する実験的研究である．単一突起下流に発生する乱流くさび内の速度を熱線風速計によって測定した．円筒の回転速度を変化させ，アンサンブル平均を求めてた．乱流くさび内の軸方向平均速度分布は，相対主流方向を中心としてほぼ対称的な分布を示した．コリオリ力は乱流くさびの非対称性には寄与するが，その程度は本実験の範囲ではくさびの広がりに現れるほど大きくない．
39.	Shintaro Yamashita, Masashi Ichimiya and Ikuo Nakamura : Experiments on the Effects of a Single Protrusion on the Boundary Layer Around a Cylinder Spinning in an Axial Flow, --- Mean and Fluctuating Velocities in a Turbulence-Wedge Region ---, Proceedings of AIAA/ASME/SIAM/APS 1st National Fluid Dynamics Congress, 1297-1304, Cincinnati, Ohio, USA, Jul. 1988. (Summary) 軸流中の静止及び回転円筒上の単一突起による乱流遷移に関する実験的研究である．単一突起下流に発生する乱流くさび内の速度を熱線風速計によって測定した．乱流くさびと外側の層流との界面に存在する縦渦がくさびの発達に本質的な役割を果たすことが明らかにされた．平均速度ベクトルはくさびの内·外及びくさび内部において，その大きさ，方向とも大きく変化し，その特徴を極線図で示すことができた．円筒回転時における乱流くさび領域は円筒に巻きつくねじれたものであるが，円筒とともに回転する系から見て，平面に展開すると下流に向かってほぼ直線的に増加した．

Proceeding of Domestic Conference:

1.	Masako Jige and Masashi Ichimiya : Fractal analysis of velocity signals in a turbulent boundary layer, 第32回日本流体力学会中四国・九州支部講演会講演論文集, Nov. 2023.
2.	地下真子 and Masashi Ichimiya : Vorticity Fluctuation and Two-Point Entropy in Turbulent Boundary Layer (Effect of Relaminarization), 日本流体力学会年会2023講演論文集, Sep. 2023.
3.	Masako Jige and Masashi Ichimiya : Information Analysis of Spatiotemporal Structure in Relaminarizing Turbulent Boundary Layer -Velocity difference in wall-normal direction-, 日本機械学会2023年度年次大会講演論文集, Sep. 2023.
4.	Masako Jige and Masashi Ichimiya : Fractal analysis of binary signals in a turbulent boundary layer, 第31回日本流体力学会中四国・九州支部講演会講演論文集, May 2023.
5.	Takumi Mitani and Masashi Ichimiya : Characteristics of Turbulence Wedge Generated by a Single Roughness Element under Favorable Pressure Gradient, 日本機械学会中国四国支部第61期総会・講演会, Mar. 2023.
6.	Yugo Tabuchi and Masashi Ichimiya : Analysis of relaminarizing turbulent boundary layer with deep neural network, 日本機械学会中国四国支部第61期総会・講演会, Mar. 2023.
7.	Takumi Masuda and Masashi Ichimiya : Laminar-Turbulent Transition of Two-Dimensional Mixing layer with Periodic Disturbance (Comparison of Disturbance Mode), 日本機械学会中国四国支部第61期総会・講演会, Mar. 2023.
8.	KEISUKE Inoue and Masashi Ichimiya : Growth of turbulent patches due to forced disturbance in the developing region in the circular pipe, 日本機械学会中国四国支部第61期総会・講演会講演論文集, Mar. 2023.
9.	MASAKO Jige and Masashi Ichimiya : Information Analysis of Lorenz Model toward Analysis of Chaotic Turbulence, 日本機械学会中国四国支部第61期総会・講演会講演論文集, Mar. 2023.
10.	Keishi Itoh and Masashi Ichimiya : Effect of Computational Conditions on Numerical Simulation of Flat-Plate Boundary Layer, 日本機械学会中国四国支部第61期総会・講演会, Mar. 2023.
11.	Masuda Takumi and Masashi Ichimiya : 2次元混合層に及ぼす周期撹乱の影響, 第30回日本流体力学会中四国・九州支部講演会講演論文集, Nov. 2022.
12.	MASAKO Jige, Masashi Ichimiya and Ikuo Nakamura : Permutation Entropy Analysis of Relaminarizing Turbulent Boundary Layer, 日本機械学会第100期流体工学部門講演会講演論文集, Nov. 2022.
13.	Yugo Tabuchi and Masashi Ichimiya : Analysis of relaminarizing turbulent boundary layer under a favorable pressure gradient with machine learning, 日本機械学会第100期流体工学部門講演会講演論文集, Nov. 2022.
14.	地下真子, Masashi Ichimiya and Ikuo Nakamura : Analysis of relaminarizing turbulent boundary layer with various information measures, 日本流体力学会年会2022講演論文集, Sep. 2022.
15.	田渕祐悟 and Masashi Ichimiya : Analysis of relaminarizing turbulent boundary layer with machine learning, 日本流体力学会年会2022講演論文集, Sep. 2022.
16.	Masako Jige, Masashi Ichimiya and Ikuo Nakamura : Information analysis of relaminarizing turbulent boundary layer, 日本機械学会2022年度年次大会講演論文集, Sep. 2022.
17.	Masako Jige and Masashi Ichimiya : 乱流境界層の再層流化過程の情報量解析, 第29回日本流体力学会中四国・九州支部講演会講演論文集, May 2022.
18.	Masuda Takumi and Masashi Ichimiya : 周期撹乱の振幅が二次元混合層に与える影響(撹乱様式の比較), 第29回日本流体力学会中四国・九州支部講演会講演論文集, May 2022.
19.	Keishi Itoh and Masashi Ichimiya : Effect of calculation conditions on numerical simulations of flat-plate boundary-layer, 日本機械学会中国四国支部第60期総会・講演会, Mar. 2022.
20.	Takumi Masuda and Masashi Ichimiya : The Laminar-Turbulent Transition in a Two-Dimensional Mixing Layer by the Local Periodic Disturbance (Effect of disturbance mode), 日本機械学会中国四国支部第60期総会・講演会, Mar. 2022.
21.	Yugo Tabuchi, Masashi Ichimiya and Ikuo Nakamura : Complexity analysis of relaminarizing turbulent boundary layer under a favorable pressure gradient, 日本機械学会中国四国支部第60期総会・講演会, Mar. 2022.
22.	Katsuya Fujiwara and Masashi Ichimiya : Laminar-Turbulent Transition Process in Later Stage of an Inlet Region in a Circular Pipe by the Jet Disturbance, 日本機械学会中国四国支部第60期総会・講演会講演論文集, Mar. 2022.
23.	Satoh Kenichi and Masashi Ichimiya : Turbulence Wedge Generated by a Single Roughness Element under Favorable Pressure Gradient, 日本機械学会中国四国支部第60期総会・講演会講演論文集, Mar. 2022.
24.	Yugo Tabuchi, Masashi Ichimiya and Ikuo Nakamura : Analysis of relaminarizing turbulent boundary layer under a favorable pressure gradient with Kolmogorov complexity, 日本機械学会第99期流体工学部門講演会講演論文集, Nov. 2021.
25.	Takumi Masuda, Takumi Yano and Masashi Ichimiya : Effect of periodic disturbance on laminar-turbulent transition of two-dimensional mixing layer, 日本機械学会第99期流体工学部門講演会講演論文集, Nov. 2021.
26.	Yugo Tabuchi, Masashi Ichimiya and Ikuo Nakamura : Analysis of relaminarizing turbulent boundary layer with Kolmogorov complexity, 日本流体力学会年会2021講演論文集, Sep. 2021.
27.	Yugo Tabuchi and Masashi Ichimiya : 乱流境界層の再層流化過程におけるコルモゴロフ複雑度解析, 第27回日本流体力学会中四国・九州支部講演会講演論文集, Jun. 2021.
28.	Katsuya Fujiwara and Masashi Ichimiya : Laminar-Turbulent Transition Process in a Circular Pipe by the Jet Disturbance, 日本機械学会中国四国支部第59期総会・講演会講演論文集, Mar. 2021.
29.	Satoh Kenichi and Masashi Ichimiya : Properties of Turbulence Wedge Generated by a Single Roughness Element under Favorable Pressure Gradient (about Spanwise Growth Mechanism), 日本機械学会中国四国支部第59期総会・講演会講演論文集, Mar. 2021.
30.	Takumi Yano and Masashi Ichimiya : Laminar-Turbulent Transition of Two-Dimensional Mixing Layer with Periodic Disturbance, 日本機械学会中国四国支部第59期総会・講演会講演論文集, Mar. 2021.
31.	Ryota Hino and Masashi Ichimiya : Effect of Computational Conditions on Numerical Simulation of Flat-Plate Boundary Layer with OpenFOAM, 日本機械学会中国四国支部第59期総会・講演会講演論文集, Mar. 2021.
32.	Masashi Ichimiya and Ikuo Nakamura : Information analysis in forced transition process in an inlet boundary-layer in a circular pipe, 日本流体力学会年会2020講演論文集, Sep. 2020.
33.	Takumi Yano and Masashi Ichimiya : ffect of Periodic Disturbance on Laminar-Turbulent Transition of Two-Dimensional Mixing Layer, 日本機械学会中国四国支部第58期総会・講演会講演論文集, Mar. 2020.
34.	Ryota Hino and Masashi Ichimiya : Effect of Computational Domain on Numerical Simulation of Flat-Plate Boundary Layer with OpenFOAM, 日本機械学会中国四国支部第58期総会・講演会講演論文集, Mar. 2020.
35.	Watashiro Daichi and Masashi Ichimiya : Properties of Turbulence Wedge Generated by a Single Roughness Element under Favorable Pressure Gradient ~about Spanwise Direction Growth Mechanism~, 日本機械学会中国四国支部第58期総会・講演会講演論文集, Mar. 2020.
36.	Fujihara Hiroki and Masashi Ichimiya : Laminar-Turbulent Transition in an Inlet Region in a Circular Pipe by the Jet Disturbance (Isolated Turbulence Patches in Later Stage in an Inlet Region), 日本機械学会中国四国支部第58期総会・講演会講演論文集, Mar. 2020.
37.	Kikuchi Michihiro and Masashi Ichimiya : Phase Shift between Oscilating Normal Flat Plate and Velocity in the Wake, 日本機械学会中国四国支部第58期総会・講演会講演論文集, Mar. 2020.
38.	Masashi Ichimiya and Ikuo Nakamura : Analysis of forced boundary-layer transition process on a flat plate with various information measures, 日本流体力学会年会2019講演論文集, Sep. 2019.
39.	Ryo Yabuchi and Masashi Ichimiya : An Effect of the Amplitude of Periodic Disturbance on Two-Dimensional Mixing layer, 日本機械学会中国四国支部第57期総会・講演会講演論文集, Mar. 2019.
40.	Yoshito Sakurama and Masashi Ichimiya : Effect of Computational Condition on Numerical Simulation of Flat-Plate Boundary Layer with OpenFOAM, 日本機械学会中国四国支部第57期総会・講演会講演論文集, Mar. 2019.
41.	Watashiro Daichi and Masashi Ichimiya : Properties of Turbulence Wedge Generated by a Single Roughness Element under Favorable Pressure Gradient(Examination of Spanwise Velocity), 日本機械学会中国四国支部第57期総会・講演会講演論文集, Mar. 2019.
42.	Fujihara Hiroki and Masashi Ichimiya : Laminar-Turbulent Transition in a Circular Pipe in an Inlet Region by the Jet Disturbance (Isolated Turbulence Patches characteristics in Later Stage in an Inlet Region), 日本機械学会中国四国支部第57期総会・講演会講演論文集, Mar. 2019.
43.	Kikuchi Michihiro and Masashi Ichimiya : Phase Shift between Oscillating Normal Flat Plate and Streamwise Velocity in the Wake, 日本機械学会中国四国支部第57期総会・講演会講演論文集, Mar. 2019.
44.	Masashi Ichimiya and Ikuo Nakamura : Analysis of laminar-turbulent transition process in mixing layer with various information measures, 日本流体力学会年会2018講演論文集, Sep. 2018.
45.	Masashi Ichimiya and Nakamura Ikuo : Analysis of Laminar-Turbulent Transition Process in Mixing Layer with Information Measures, 第21回日本流体力学会中四国・九州支部講演会講演論文集, Jun. 2018.
46.	Ryo Yabuchi and Masashi Ichimiya : Laminar-Turbulent Transition of Two-Dimensional Mixing Layer with Periodic Disturbance (Effect of, 日本機械学会中国四国支部第56期総会・講演会講演論文集, Mar. 2018.
47.	Yoshito Sakurama and Masashi Ichimiya : Effect of Outlet Boundary Condition on Numerical Simulation of Flat-Plate Boundary Layer, 日本機械学会中国四国支部第56期総会・講演会講演論文集, Mar. 2018.
48.	Toshinori Kuroishi and Masashi Ichimiya : Application of Pade Approximant to Laminar Boundary Layer on a Rotating Cylinder, 日本機械学会中国四国支部第56期総会・講演会講演論文集, Mar. 2018.
49.	Tomoya Sugiyama and Masashi Ichimiya : Properties of Turbulence Wedge Generated by a Single Roughness Element under Favorable Pressure Gradient, 日本機械学会中国四国支部第56期総会・講演会講演論文集, Mar. 2018.
50.	Fukuda Ryosuke and Masashi Ichimiya : Phase Shift between Oscillating Flat Plate and Streamwise Velocity in the Wake, 日本機械学会中国四国支部第56期総会・講演会講演論文集, Mar. 2018.
51.	Nakatsu Ryotaro and Masashi Ichimiya : Laminar-Turbulent Transition in an Inlet Region of a Circular Pipe Induced by the Jet Disturbance, 日本機械学会中国四国支部第56期総会・講演会講演論文集, Mar. 2018.
52.	Masashi Ichimiya and Ikuo Nakamura : Analysis of laminar-turbulent transition process in mixing layer with various information measures, 日本流体力学会年会2017講演論文集, Aug. 2017.
53.	Ryo Yabuuchi and Masashi Ichimiya : 外部撹乱が2次元混合層に及ぼす効果, 第19回日本流体力学会中四国・九州支部講演会講演論文集, May 2017.
54.	Hanamitsu Aiyuki and Masashi Ichimiya : Relationship between Analytical Domain and Accuracy of Numerical Solution in External Flow, 日本機械学会中国四国支部第55期総会・講演会講演論文集, Mar. 2017.
55.	Matsubara Atsuki and Masashi Ichimiya : Effect of Small Periodic Disturbance on Two-Dimensional Mixing Layer, 日本機械学会中国四国支部第55期総会・講演会講演論文集, Mar. 2017.
56.	Nakatsu Ryotaro and Masashi Ichimiya : Property of Turbulent Patch at Downstream Portion in an Inlet Region by the Jet Disturbance, 日本機械学会中国四国支部第55期総会・講演会講演論文集, Mar. 2017.
57.	(名) RyotaroNakatsu, Kazuhiro Tamura and Masashi Ichimiya : Properties of turbulent transition in the latter part of an inlet region of a circular pipe induced by the jet disturbance, 日本機械学会第94期流体工学部門講演会講演論文集, Nov. 2016.
58.	Atsuki Matsubara and Masashi Ichimiya : The laminar-turbulent transition in a two-dimensional mixing layer by the local periodic disturbance (effect of Reynolds number), 日本機械学会第94期流体工学部門講演会講演論文集, Nov. 2016.
59.	Masashi Ichimiya and Ikuo Nakamura : Complexity analysis in relaminarizing turbulent boundary layer, 日本流体力学会年会2016講演論文集, Sep. 2016.
60.	Atsuki Matsubara and Masashi Ichimiya : The Laminar-Turbulent Transition in a Two-Dimensional Mixing Layer by the Periodically Oscillating Plate Disturbance(Difference of the Reynolds number), 日本機械学会中国四国支部第54期総会・講演会講演論文集, Mar. 2016.
61.	Kazuhiro Tamura and Masashi Ichimiya : Laminar-Turbulent Transition Process in a Circular Pipe by the Jet Disturbance (Isolated Turbulence Patches in Later Stage in an Inlet Region), 日本機械学会中国四国支部第54期総会・講演会講演論文集, Mar. 2016.
62.	Takuya Kawasumi and Masashi Ichimiya : Laminar-turbulent transition of the flat-plate boundary layer by the interference of the turbulence wedges, 日本機械学会中国四国支部第54期総会・講演会講演論文集, Mar. 2016.
63.	Atsuki Matsubara, Takeshi Oohara and Masashi Ichimiya : 微小周期撹乱による二次元混合層の乱流遷移(レイノルズ数の影響), 日本機械学会第93期流体工学部門講演会講演論文集, Nov. 2015.
64.	Masashi Ichimiya, Ikuo Nakamura and Kazuhiro Tamura : Complexity analysis in forced transition process in an inlet boundary-layer in a circular pipe, 日本流体力学会年会2015講演論文集, Sep. 2015.
65.	Takeshi Oohara and Masashi Ichimiya : Laminar-Turbulent Transition in a Two-Dimensional Mixing Layer by the Local Periodic Disturbance(Effects of Difference of Reynolds Number), 日本機械学会中国四国支部第53期総会・講演会講演論文集, Mar. 2015.
66.	Yasuyuki Morikami, Yoshifumi Jodai and Masashi Ichimiya : Wake Flow Measurement behind a Flat Plate with Corrugated Sheet and the Dominant Shedding Frequency, 日本機械学会中国四国支部第53期総会・講演会講演論文集, Mar. 2015.
67.	Sho Onishi, Yoshifumi Jodai and Masashi Ichimiya : Calibration of Five-hole Pitot Tube and Measurement of Turbulent Flow behind a Flat Plate, 日本機械学会中国四国支部第53期総会・講演会講演論文集, Mar. 2015.
68.	Kazuhiro Tamura and Masashi Ichimiya : Laminar-Turbulent Transition in a Circular Pipe by the Jet Disturbance (Isolated Turbulence Patches in Later Stage in an Inlet Region), 日本機械学会中国四国支部第53期総会・講演会講演論文集, Mar. 2015.
69.	Takuya Kawasumi and Masashi Ichimiya : Laminar-turbulent transition of the flat-plate boundary layer by a line of roughness elements (The effect of the interference of the turbulence wedges on the turbulence statistics), 日本機械学会中国四国支部第53期総会・講演会講演論文集, Mar. 2015.
70.	Takuya Kawasumi and Masashi Ichimiya : 平板上単一突起下流の乱流くさびの複雑さ解析, 日本機械学会第92期流体工学部門講演会講演論文集, Oct. 2014.
71.	Kazuhiro Tamura, Takafumi Izawa and Masashi Ichimiya : 円管内助走部における噴流撹乱を用いた乱流遷移の特性(孤立乱流塊の成長機構), 日本機械学会第92期流体工学部門講演会講演論文集, Oct. 2014.
72.	Masashi Ichimiya, Ikuo Nakamura and Tatsuhiko Hara : Complexity analysis in forced boundary-layer transition process on a flat plate, 日本流体力学会年会2014講演論文集, Sep. 2014.
73.	Kunihiko Ishihara and Masashi Ichimiya : 大音響騒音発生時における管群ダクト内の圧力・流量の挙動について, 日本機械学会機械力学・計測制御部門Dynamics and Design Conference 2014講演論文集, Aug. 2014.
74.	Shunsuke Arita and Masashi Ichimiya : 外部流れにおける計算領域の大きさの影響, 日本機械学会中国四国支部第52期総会・講演会講演論文集, Mar. 2014.
75.	Takafumi Izawa and Masashi Ichimiya : 噴流撹乱による円管内助走部の乱流遷移(孤立乱流塊の特性), 日本機械学会中国四国支部第52期総会・講演会講演論文集, Mar. 2014.
76.	Tomoki Inoue and Masashi Ichimiya : 突起列による平板境界層の乱流遷移(乱流くさび干渉による乱流量の発達), 日本機械学会中国四国支部第52期総会・講演会講演論文集, Mar. 2014.
77.	Ryo Watanabe and Masashi Ichimiya : ピッチ振動する自動車モデルの空力安定性, 日本機械学会中国四国支部第52期総会・講演会講演論文集, Mar. 2014.
78.	Takeshi Oohara and Masashi Ichimiya : 局所低周波周期撹乱による二次元混合層の乱流遷移, 日本機械学会中国四国支部第52期総会・講演会講演論文集, Mar. 2014.
79.	Masashi Ichimiya : コルモゴロフ複雑度を用いた乱流の複雑さ解析, 日本機械学会第91期流体工学部門講演会講演論文集, Nov. 2013.
80.	Ryo Watanabe and Masashi Ichimiya : 上下振動する自動車モデル周りの流れ, 日本流体力学会中四国・九州支部講演会講演論文集, Oct. 2013.
81.	Shunsuke Arita and Masashi Ichimiya : 計算領域の大きさが平板層流境界層に及ぼす影響, 日本流体力学会中四国・九州支部講演会講演論文集, Oct. 2013.
82.	Masashi Ichimiya : 自由せん断流の乱流遷移過程の新しい測度について, 日本流体力学会年会2013講演論文集, Sep. 2013.
83.	Tomoki Inoue, Tatsuhiko Hara and Masashi Ichimiya : 突起列による平板境界層の乱流遷移(乱流くさび干渉域における乱れエネルギの特性), 日本機械学会2013年度年次大会講演論文集, Sep. 2013.
84.	Takeshi Oohara, Hiroshi Sakai and Masashi Ichimiya : 局所周期撹乱による二次元混合層の乱流遷移特性, 日本機械学会2013年度年次大会講演論文集, Sep. 2013.
85.	Masashi Ichimiya : A New Measure for the Laminar-Turbulent Transition Process in Free-Shear Flows, 第11回日本流体力学会中四国・九州支部総会・講演会講演論文集, Jun. 2013.
86.	Koujirou Satou and Masashi Ichimiya : データ圧縮を用いた流れのランダムさ解析(混合層の遷移過程への適用), 日本機械学会中国四国支部第51期総会・講演会講演論文集, Mar. 2013.
87.	Tatsuhiko Hara and Masashi Ichimiya : 突起列による平板境界層の乱流遷移(乱れエネルギ生成からみた流れ場の様相), 日本機械学会中国四国支部第51期総会・講演会講演論文集, Mar. 2013.
88.	Takafumi Izawa and Masashi Ichimiya : 円管内助走部の乱流遷移(孤立乱流塊の間隔の影響), 日本機械学会中国四国支部第51期総会・講演会講演論文集, Mar. 2013.
89.	Hiroshi Sakai and Masashi Ichimiya : 混合層の乱流遷移に及ぼす局所低周波撹乱の影響, 日本機械学会中国四国支部第51期総会・講演会講演論文集, Mar. 2013.
90.	Takafumi Izawa and Masashi Ichimiya : 円管助走部での層流の乱流遷移過程(孤立乱流塊の間隔の影響), 日本機械学会第90期流体工学部門講演会講演論文集, 455-456, Nov. 2012.
91.	Tatsuhiko Hara and Masashi Ichimiya : 突起列による平板境界層の乱流遷移(乱れエネルギの下流方向変化), 日本機械学会第90期流体工学部門講演会講演論文集, 453-454, Nov. 2012.
92.	Masashi Ichimiya : Growth of Isolated Turbulence Patches in Developing Pipe Flow, 日本流体力学会年会2012講演要旨集, Sep. 2012.
93.	Hiroshi Sakai and Masashi Ichimiya : Laminar-Turbulent Transition in a Two-Dimensional Mixing Layer by the Local Low-Frequency Disturbance(Effects of Difference of Oscillating Motion), 日本機械学会2012年度年次大会講演論文集, Sep. 2012.
94.	Masashi Ichimiya : Randomness Analysis due to Data Compression(1st Report, Representation Method of Randomness), 日本機械学会2012年度年次大会講演論文集, Sep. 2012.
95.	Koujirou Satou and Masashi Ichimiya : Randomness Analysis due to Data Compression(2nd Report Application to Laminar-Turbulent Transition Process in Mixing Layer), 日本機械学会2012年度年次大会講演論文集, Sep. 2012.
96.	Masashi Ichimiya : コルロモゴロフ複雑度を用いた流れの不規則さ表現(不規則さの定量化), 日本機械学会中国四国支部第50期総会・講演会講演論文集, Mar. 2012.
97.	Koujirou Satou and Masashi Ichimiya : コルモゴロフ複雑度を用いた流れの不規則さ表現(混合層における不規則さ), 日本機械学会中国四国支部第50期総会・講演会講演論文集, Mar. 2012.
98.	Tatsuhiko Hara and Masashi Ichimiya : 突起列による平板境界層の乱流遷移(乱流くさび内の乱れエネルギの様相), 日本機械学会中国四国支部第50期総会・講演会講演論文集, Mar. 2012.
99.	Yuki Fujiwara and Masashi Ichimiya : 自動車ピラー形状と車両安定性の関係, 日本機械学会中国四国支部第50期総会・講演会講演論文集, Mar. 2012.
100.	Hideki Ohno and Masashi Ichimiya : 円管内助走部での撹乱による乱流塊の特性(遷移過程と渦形成), 日本機械学会中国四国支部第50期総会・講演会講演論文集, Mar. 2012.
101.	Hiroshi Sakai and Masashi Ichimiya : 局所周期撹乱による二次元混合層の乱流遷移(板振動による低周波撹乱の影響), 日本機械学会中国四国支部第50期総会・講演会講演論文集, Mar. 2012.
102.	Hiroshi Sakai, Shinya Kamada and Masashi Ichimiya : 二次元混合層に及ぼす低周波撹乱の影響, 日本機械学会2011年度年次大会講演論文集, Sep. 2011.
103.	Masashi Ichimiya : Effect of Local Periodic Disturbance on Laminar-Turbulent Transition in Mixing Layer Downstream of Two-Dimensional Jet, 日本流体力学会年会2011講演要旨集, 274, Sep. 2011.
104.	Shinya Kamada and Masashi Ichimiya : Properties of Laminar-Turbulent Transition in a Two-Dimensional Mixing Layer by the Local Periodic Disturbance, --- Effects of the Disturbance Frequency ---, 日本機械学会中国四国支部第49期総会·講演会講演論文集, 363-364, Mar. 2011.
105.	Ohno Hideki and Masashi Ichimiya : Properties of Isolated Turbulent Patches by the Disturbance in the Inlet Region of the Circular Pipe, --- Developing Process of Isolated Turbulent Patches ---, 日本機械学会中国四国支部第49期総会·講演会講演論文集, 361-362, Mar. 2011.
106.	Yasushi Fujiwara and Masashi Ichimiya : Laminar-Turbulent Transition of the Flat Plate Boundary Layer by a Line of Roughness Elements, --- Complexity Representation of Turbulent Statistics ---, 日本機械学会中国四国支部第49期総会·講演会講演論文集, 283-284, Mar. 2011.
107.	Yuki Fujiwara and Masashi Ichimiya : Relationship between Shape of Vehicle Models and Vehicle Body Stability, 日本機械学会中国四国支部第49期総会·講演会講演論文集, 285-286, Mar. 2011.
108.	Hideki Ohno and Masashi Ichimiya : 噴流による円管内助走部の乱流塊特性, 日本機械学会流体工学部門講演会講演論文集, 547-548, Oct. 2010.
109.	Shinya Kamada and Masashi Ichimiya : 2次元噴流出口混合層に及ぼす局所周期撹乱の影響, 日本機械学会流体工学部門講演会講演論文集, 11-12, Oct. 2010.
110.	Yoshifumi Jodai, Masashi Ichimiya and Hideo Osaka : 平板後縁近傍乱流境界層の乱流場の発達に及ぼすスプリッター板の影響, 日本機械学会徳島講演会講演論文集, 109-110, Oct. 2010.
111.	Yuji Okita and Masashi Ichimiya : 乱流境界層内に設置された傾斜微小フェンス後方の乱流特性, 日本機械学会徳島講演会講演論文集, 99-100, Oct. 2010.
112.	Yuki Fujiwara and Masashi Ichimiya : 自動車トランクデッキ上の境界層と車体安定性の関係, 日本機械学会徳島講演会講演論文集, 97-98, Oct. 2010.
113.	Yasushi Fujiwara and Masashi Ichimiya : Laminar-Turbulent Transition of the Flat Plate Boundary Layer by a Line of Roughness Elements, --- Comparison Between a Single Roughness Element and a Line of Roughness Elements ---, 日本機械学会徳島講演会講演論文集, 95-96, Oct. 2010.
114.	Masashi Ichimiya, Hayato Fujimura and Hideki Ohno : Condition of generation of isolated turbulence patches in developing pipe flow, 日本流体力学会年会2010講演要旨集, 25, Sep. 2010.
115.	Masashi Ichimiya and Hideki Ohno : 円管内助走部における孤立乱流塊の発生条件, 日本機械学会2010年度年次大会講演論文集, Vol.2, 235-236, Sep. 2010.
116.	Masashi Ichimiya : データ圧縮を用いた乱流速度の複雑さ表示, 日本機械学会2010年度年次大会講演論文集, Vol.6, 1-2, Sep. 2010.
117.	Masashi Ichimiya and Shinya Kamada : データ圧縮を用いた自由せん断流の乱流遷移過程の定量的表示, 日本機械学会2010年度年次大会講演論文集, Vol.6, 5-6, Sep. 2010.
118.	Masashi Ichimiya and Yasushi Fujiwara : データ圧縮を用いた境界層流の乱流遷移過程の定量的表示, 日本機械学会2010年度年次大会講演論文集, Vol.6, 3-4, Sep. 2010.
119.	Masashi Ichimiya : Complexity Representation of Turbulent Signal Using All-Purpose Compression Software, 日本機械学会中国四国支部第48期総会·講演会講演論文集, 435-436, Mar. 2010.
120.	Yasushi Fujiwara and Masashi Ichimiya : Laminar-Turbulent Transition of the Flat Plate Boundary Layer by a Line of Roughness Elements, --- Additional Fluctuation due to Interference of Turbulence Wedges ---, 日本機械学会中国四国支部第48期総会·講演会講演論文集, 443-444, Mar. 2010.
121.	Shinya Kamada and Masashi Ichimiya : Properties of Laminar-Turbulent Transition in a Two-Dimensional Mixing Layer by the Periodic Disturbance, --- Stationarity of Disturbance Caused by Oscillating Plates ---, 日本機械学会中国四国支部第48期総会·講演会講演論文集, 439-440, Mar. 2010.
122.	Hayato Fujimura and Masashi Ichimiya : Laminar-Turbulent Transition by the Disturbance in the Inlet Region of the Circular Pipe, --- Threshold and Properties of Isolated Turbulent Patches ---, 日本機械学会中国四国支部第48期総会·講演会講演論文集, 445-446, Mar. 2010.
123.	Yuki Iwami and Masashi Ichimiya : Surrounding Flow of Vibrating Vehicle Models, --- Comparison between Two-Type Models ---, 日本機械学会中国四国支部第48期総会·講演会講演論文集, 437-438, Mar. 2010.
124.	Masashi Ichimiya and Yuki Iwami : Relationship Between the Shape of Vehicle Model and Surrounding Flow, --- Properties of Turbulent Quantities in the Model Wake ---, 日本機械学会流体工学部門講演会講演論文集, 133-134, Nov. 2009.
125.	Masashi Ichimiya, Keishi Nishimura and Yasushi Fujiwara : Laminar-Turbulent Transition of the Flat Plate Boundary Layer by a Line of Roughness Elements, --- Development of Turbulent Quantities within Turbulence Wedges ---, 日本機械学会流体工学部門講演会講演論文集, 99-100, Nov. 2009.
126.	Masashi Ichimiya and Hayato Fujimura : Development of Isolated Turbulent Patches by the Forced Disturbance within the Inlet Region of a Circular Pipe, 日本機械学会流体工学部門講演会講演論文集, 107-108, Nov. 2009.
127.	Masashi Ichimiya, Shinya Kamada and Takehiro Miura : Progress of Laminar-Turbulent Transition in a Two-Dimensional Mixing Layer(On Measure of the Progress of Transition Process), 日本機械学会2009年度年次大会講演論文集, Vol.2, 175-176, Sep. 2009.
128.	Masashi Ichimiya, Hayato Matsudaira and Hayato Fujimura : Experimental observation of isolated turbulence patches in developing pipe flow, 日本流体力学会年会2009講演要旨集, 288, Sep. 2009.
129.	Yuki Iwami and Masashi Ichimiya : Relationship Between the Shape of Vehicle Model and Surrounding Flow, --- Aspect of Velocity Fluctuation in Wake of the Model ---, 日本機械学会中国四国支部第47期総会·講演会講演論文集, 75-76, Mar. 2009.
130.	Hayato Fujimura and Masashi Ichimiya : Laminar-Turbulent Transition Process of Boundary Layer in the Inlet Region of the Circular Pipe, --- Isolated Turbulent Patches Generated by the Local Disturbance ---, 日本機械学会中国四国支部第47期総会·講演会講演論文集, 219-220, Mar. 2009.
131.	Takehiro Miura and Masashi Ichimiya : Laminar-Turbulent Transition in a Two-Dimensional Mixing Layer by the Periodic Disturbance, --- Influence of Separation from the Edge of the Oscillating Plates ---, 日本機械学会中国四国支部第47期総会·講演会講演論文集, 181-182, Mar. 2009.
132.	Keishi Nishimura and Masashi Ichimiya : Laminar-Turbulent Transition of the Flat Plate Boundary Layer by a Line of Roughness Elements, --- Effect of Interference of Turbulent Wedges ---, 日本機械学会中国四国支部第47期総会·講演会講演論文集, 225-226, Mar. 2009.
133.	Takehiro Miura and Masashi Ichimiya : Characteristic of Laminar-Turbulent Transition in a Two-Dimensional Mixing Layer by the Periodic Disturbance, 日本機械学会岡山講演会講演論文集, 191-192, Oct. 2008.
134.	Hayato Fujimura and Masashi Ichimiya : Properties of Turbulent Patches Generated by the Local Disturbance in the Inlet Region of the Circular Pipe, 日本機械学会岡山講演会講演論文集, 189-190, Oct. 2008.
135.	Keishi Nishimura and Masashi Ichimiya : Laminar-Turbulent Transition of the Flat Plate Boundary Layer by a Line of Roughness Elements, --- Property in Interference Region of Turbulence Wedges ---, 日本機械学会岡山講演会講演論文集, 187-188, Oct. 2008.
136.	Yuki Iwami and Masashi Ichimiya : Relationship Between the Shape of Vehicle Model and Surrounding Flow, 日本機械学会岡山講演会講演論文集, 181-182, Oct. 2008.
137.	Masashi Ichimiya : Effect of the oscillating plates at the exit of nozzle on the laminar-turbulent transition, 日本流体力学会年会2008講演要旨集, 56, Sep. 2008.
138.	Keishi Nishimura and Masashi Ichimiya : 突起列による平板境界層の乱流遷移の促進, 日本機械学会中国四国支部第46期総会·講演会講演論文集, 151-152, Mar. 2008.
139.	Takehiro Miura and Masashi Ichimiya : 周期的撹乱による二次元混合層の乱流遷移, 日本機械学会中国四国支部第46期総会·講演会講演論文集, 147-148, Mar. 2008.
140.	Yusuke Akiyama and Masashi Ichimiya : 振動時の自動車モデルのリアデッキ上境界層の特性, 日本機械学会中国四国支部第46期総会·講演会講演論文集, 153-154, Mar. 2008.
141.	Hayato Matsudaira and Masashi Ichimiya : 円管内助走部の撹乱による乱流塊の発達, 日本機械学会中国四国支部第46期総会·講演会講演論文集, 127-128, Mar. 2008.
142.	Masashi Ichimiya and Hayato Matsudaira : 円管内助走部の撹乱による乱流塊の特性, 日本機械学会流体工学部門講演会講演概要集, 43, Nov. 2007.
143.	Masashi Ichimiya and Yusuke Akiyama : 振動時の自動車モデル上の圧力変動, 日本機械学会流体工学部門講演会講演概要集, 48, Nov. 2007.
144.	Hayato Matsudaira and Masashi Ichimiya : 円管内助走部の撹乱による乱流遷移, 日本機械学会中国四国支部第45期総会·講演会講演論文集, 201-202, Mar. 2007.
145.	Yusuke Akiyama and Masashi Ichimiya : 振動時の自動車モデル上境界層の特性, 日本機械学会中国四国支部第45期総会·講演会講演論文集, 207-208, Mar. 2007.
146.	Yoshifumi Jodai, Yoshikazu Takahashi, Masashi Ichimiya and Hideo Osaka : 長平板背後の渦構造に及ぼすスプリッター板の影響, 日本機械学会中国四国支部第45期総会・講演会講演論文集, 205-206, Mar. 2007.
147.	Masashi Ichimiya and Masaki Nakata : Properties of the relaminarizing turbulent boundary layer under flow acceleration, 日本流体力学会年会2006講演アブストラクト集, 256, Sep. 2006.
148.	Masaki Nakata and Masashi Ichimiya : Sink-flowによる乱流境界層の再層流化構造, 日本機械学会中国四国支部第44期総会·講演会講演論文集, 113-114, Mar. 2006.
149.	Akiyoshi Okajima and Masashi Ichimiya : 二次元ノズル下流の混合層の乱流遷移, 日本機械学会中国四国支部第44期総会·講演会講演論文集, 109-110, Mar. 2006.
150.	Yuji Okita, Hayato Matsudaira, Masashi Ichimiya and Katsutaka Nakamura : 平板乱流境界層内に設置した傾斜フェンスまわりの乱流特性, 日本機械学会第83期流体工学部門講演会講演概要集, 117, Oct. 2005.
151.	Yoshifumi Jodai, Yoshikazu Takahashi, Masashi Ichimiya and Hideo Osaka : 平板後縁近傍乱流境界層の発達に及ぼすスプリッター板の影響, 日本機械学会第83期流体工学部門講演会講演概要集, 116, Oct. 2005.
152.	Masashi Ichimiya and Masaski Nakata : Relaminarization Structures of a Flat-Plate Turbulent Boundary Layer by the Sink-Flow, 日本機械学会第83期流体工学部門講演会講演概要集, 113, Oct. 2005.
153.	Yoshifumi Jodai, Yoshikazu Takahashi, Masashi Ichimiya and Hideo Osaka : 平板後縁近傍乱流境界層の発達に及ぼすスプリッタープレートの影響, 日本機械学会中国四国支部第43期総会·講演会講演論文集, 187-188, Mar. 2005.
154.	Yuji Okita, Masashi Ichimiya and Katsutaka Nakamura : 乱流境界層内に設置された傾斜フェンス後方の乱流特性, 日本機械学会中国四国支部第43期総会·講演会講演論文集, 155-156, Mar. 2005.
155.	Akihiro Yokoyama and Masashi Ichimiya : 平板上の突起列による乱流領域, 日本機械学会中国四国支部第43期総会·講演会講演論文集, 153-154, Mar. 2005.
156.	Akiyoshi Okajima and Masashi Ichimiya : 二次元混合層の乱流遷移過程, 日本機械学会中国四国支部第43期総会·講演会講演論文集, 151-152, Mar. 2005.
157.	Masaki Nakata and Masashi Ichimiya : Sink-flow乱流境界層における再層流化現象, 日本機械学会中国四国支部第43期総会·講演会講演論文集, 139-140, Mar. 2005.
158.	Takashi Yoshino and Masashi Ichimiya : 円管の助走部流れの遷移過程, 日本機械学会中国四国支部第43期総会·講演会講演論文集, 137-138, Mar. 2005.
159.	Masashi Ichimiya, Akiyoshi Okajima and Toshihiro Kato : Laminar-Turbulent Transition of a Mixing Layer Downstream of a Two-Dimensional Nozzle, 日本機械学会第82期流体工学部門講演会講演概要集, 208, Nov. 2004.
160.	Takashi Yoshino and Masashi Ichimiya : 円管内の単一突起によって発生する乱流領域の発達, 日本機械学会山口地方講演会講演論文集, 67-68, Nov. 2004.
161.	Toshihiro Kato and Masashi Ichimiya : 二次元混合層の乱流遷移過程, 日本機械学会中国四国支部第42期総会·講演会講演論文集, 351-352, Mar. 2004.
162.	Hiroshi Goto and Masashi Ichimiya : Sink flowによる乱流境界層の再層流化現象, 日本機械学会中国四国支部第42期総会·講演会講演論文集, 341-342, Mar. 2004.
163.	Yoshifumi Jodai, Yoshikazu Takahashi, Masashi Ichimiya and Hideo Osaka : 平板後縁近傍の乱流境界層の特性, 日本機械学会中国四国支部第42期総会·講演会講演論文集, 337-338, Mar. 2004.
164.	Masashi Ichimiya, Tomoaki Hosobe and Akihiro Yokoyama : Effects of a Line of Roughness Elements on Laminar-Turbulent Transition in a Flat-Plate Boundary Layer, 日本機械学会第81期流体工学部門講演会講演概要集, 152, Sep. 2003.
165.	Yoshikazu Takahashi, Yoshifumi Jodai, Masashi Ichimiya and Hideo Osaka : 平板後縁近傍の乱流境界層の特性, 日本機械学会2003年度年次大会講演論文集, Vol.2, 167-168, Aug. 2003.
166.	Yuji Okita, Masashi Ichimiya and Katsutaka Nakamura : 平板乱流境界層内に設置された傾斜フェンスまわりの乱流特性, 日本機械学会2003年度年次大会講演論文集, Vol.2, 55-56, Aug. 2003.
167.	Masashi Ichimiya and Tomoaki Hosobe : 平板境界層遷移の突起列による促進, 日本機械学会2003年度年次大会講演論文集, Vol.2, 51-52, Aug. 2003.
168.	Tomoaki Hosobe and Masashi Ichimiya : 突起列下流における平板乱流境界層の遷移過程, 日本機械学会中国四国支部第41期総会講演会講演論文集, 131-132, Mar. 2003.
169.	Hiroshi Goto and Masashi Ichimiya : Sink flowによる乱流境界層の再層流化特性, 日本機械学会中国四国支部第41期総会講演会講演論文集, 123-124, Mar. 2003.
170.	Tomohiro Abe and Masashi Ichimiya : 単一突起によって発達する円管内乱流の下流方向変化, 日本機械学会中国四国支部第41期総会講演会講演論文集, 81-82, Mar. 2003.
171.	Tomoaki Hosobe and Masashi Ichimiya : 平板上の突起列下流に発生する縦渦の特性, 日本機械学会松山地方講演会講演論文集, 63-64, Oct. 2002.
172.	Tomohiro Abe and Masashi Ichimiya : 単一突起による円管内乱流の発達過程, 日本機械学会松山地方講演会講演論文集, 57-58, Oct. 2002.
173.	Yuji Okita, Masashi Ichimiya and Katsutaka Nakamura : 平板乱流境界層内に設置された傾斜フェンスまわりの流れ, 日本機械学会2002年度年次大会講演論文集, Vol.3, 77-78, Sep. 2002.
174.	Masashi Ichimiya and Yasuaki Shibasaki : 再層流化するsink flow乱流境界層の特性, 日本機械学会2002年度年次大会講演論文集, Vol.3, 79-80, Sep. 2002.
175.	Masashi Ichimiya : 突起列から発生する複数乱流くさびの相互作用, 日本流体力学会年会2002講演論文集, 44-45, Jul. 2002.
176.	Yuji Okita, Masashi Ichimiya and Katsutaka Nakamura : 平板乱流境界層内に設置された傾斜フェンスまわりの流れ, 日本流体力学会年会2002講演論文集, 172-173, Jul. 2002.
177.	Jun Sugihara, Masashi Ichimiya and Yoshiyuki Nakase : 微小撹乱を伴う二次元噴流の特性, 日本機械学会中国四国支部第40期総会講演会講演論文集, 263-264, Mar. 2002.
178.	Yasuaki Shibasaki and Masashi Ichimiya : Sink flow乱流境界層の再層流化過程, 日本機械学会中国四国支部第40期総会講演会講演論文集, 265-266, Mar. 2002.
179.	Tomoaki Hosobe and Masashi Ichimiya : 突起列下流に発生する乱流くさび内の渦構造, 日本機械学会中国四国支部第40期総会講演会講演論文集, 267-268, Mar. 2002.
180.	Tomohiro Abe and Masashi Ichimiya : 突起により発達する円管内乱流の特性, 日本機械学会中国四国支部第40期総会講演会講演論文集, 231-232, Mar. 2002.
181.	Chihiro Sudo and Masashi Ichimiya : 乱流くさび内の縦渦が乱流遷移に及ぼす影響, 日本機械学会中国四国支部第39期総会講演会講演論文集, 191-192, Mar. 2001.
182.	Tetsuya Kato and Masashi Ichimiya : 円管内助走部の単一突起による乱流遷移の特性, 日本機械学会中国四国支部第39期総会講演会講演論文集, 189-190, Mar. 2001.
183.	Yasuaki Shibasaki and Masashi Ichimiya : Sink flow乱流境界層の再層流化における乱れエネルギ生成の変化, 日本機械学会中国四国支部第39期総会講演会講演論文集, 187-188, Mar. 2001.
184.	Yuji Okita, Kyozo Ayukawa, Katsutaka Nakamura, Masashi Ichimiya and Yoshiyuki Nakase : 平板乱流境界層内に設置された傾斜フェンスまわりの流れ, 日本機械学会徳島地方講演会講演論文集, 109-110, Oct. 2000.
185.	Yasuaki Shibasaki and Masashi Ichimiya : Sink flow乱流境界層の再層流化過程(境界層内の変動量の特性), 日本機械学会徳島地方講演会講演論文集, 107-108, Oct. 2000.
186.	Masashi Ichimiya, Yasuaki Shibasaki and Naoki Takata : Sink flow乱流境界層の再層流化特性, 日本機械学会第78期流体工学部門講演会講演概要集, 114, Sep. 2000.
187.	Masashi Ichimiya and Naoki Takata : Sink flowによる平板乱流境界層の再層流化特性, 日本機械学会中国四国支部第38期総会講演会講演論文集, 143-144, Mar. 2000.
188.	Masashi Ichimiya and Chihiro Sudo : 平板上の突起列による乱流遷移, 日本機械学会中国四国支部第38期総会講演会講演論文集, 145-146, Mar. 2000.
189.	Yuji Okita, Kyozo Ayukawa, Katsutaka Nakamura, Masashi Ichimiya and Yoshiyuki Nakase : 平板乱流境界層内に設置された傾斜微小フェンスまわりの流れ, 日本機械学会中国四国支部第38期総会講演会講演論文集, 147-148, Mar. 2000.
190.	Masashi Ichimiya, Yoshiyuki Nakase and Junichiro Fukutomi : 単一突起による平板境界層の乱流遷移機構, 日本機械学会第77期流体工学部門講演会講演論文集, Oct. 1999.
191.	Masashi Ichimiya, Kazuki Takeuchi and Jun Sugihara : 二次元噴流中に置かれた円柱後流の構造, 日本機械学会中国四国支部第37期総会講演会講演論文集, 163-164, Mar. 1999.
192.	Masashi Ichimiya and Naoki Takata : Sink flow乱流境界層の再層流化現象, 日本機械学会中国四国支部第37期総会講演会講演論文集, 185-186, Mar. 1999.
193.	Masashi Ichimiya and Masayuki Fujikawa : 突起列下流における乱流遷移の特性, 日本機械学会中国四国支部第37期総会講演会講演論文集, 181-182, Mar. 1999.
194.	Yuji Okita, Kyozo Ayukawa, Katsutaka Nakamura, Masashi Ichimiya and Yoshiyuki Nakase : 平板乱流境界層内に設置された傾斜微小フェンスまわりの流れ, 日本機械学会中国四国支部第37期総会講演会講演論文集, 183-184, Mar. 1999.
195.	Masashi Ichimiya, Yoshiyuki Nakase, Junichiro Fukutomi and Seiichiro Kondoh : 単一突起下流に発達する乱流くさびの縦渦構造, 日本機械学会中国四国支部第35期総会講演会講演論文集, 107-108, Mar. 1997.
196.	Masashi Ichimiya, Yoshiyuki Nakase and Junichiro Fukutomi : 単一突起下流の乱流くさびの組織構造, 日本機械学会第74期全国大会講演論文集, Vol.3, 67-68, Sep. 1996.
197.	Masashi Ichimiya, Yoshiyuki Nakase, Yoshiyuki Tsuji, Ikuo Nakamura and Hirotaka Shirai : 再層流化する乱流境界層のフラクタル特性, 日本機械学会流体工学部門講演会講演論文集, 131-132, Jul. 1996.
198.	Masashi Ichimiya, Yoshiyuki Nakase, Junichiro Fukutomi and Seiichiro Kondoh : 単一突起下流の乱流くさびの発達過程, 日本機械学会流体工学部門講演会講演論文集, 137-138, Jul. 1996.
199.	Masashi Ichimiya, Yoshiyuki Nakase and Junichiro Fukutomi : 層流境界層内の乱流くさびの統計的性質, 日本機械学会第73期通常総会講演会講演論文集, Vol.3, 129-130, Apr. 1996.
200.	Masashi Ichimiya, Yoshiyuki Nakase and Junichiro Fukutomi : 単一突起下流の乱流くさび内のバースト構造, 日本機械学会第73期全国大会講演論文集, Vol.2, 217-218, Sep. 1995.
201.	Masashi Ichimiya, Yoshiyuki Nakase, Junichiro Fukutomi and Mikio Yoshikawa : 順圧力こう配下の再層流化乱流境界層のバースト構造, 日本機械学会第72期通常総会講演会講演論文集, Vol.3, 37-38, Mar. 1995.
202.	Masashi Ichimiya, Yoshiyuki Nakase, Junichiro Fukutomi and Keizo Mano : 平板上の単一突起下流の乱流くさび内の縦渦特性, 日本機械学会流体工学部門講演会講演論文集, 311-312, Nov. 1994.
203.	Masashi Ichimiya, Yoshiyuki Nakase, Junichiro Fukutomi and Masatake Yokoi : 旋回渦の特性の基礎研究, 日本機械学会山梨講演会講演論文集, 42-43, Oct. 1994.
204.	Masashi Ichimiya, Yoshiyuki Nakase and Junichiro Fukutomi : 順圧力こう配下の逆遷移乱流境界層の統計的性質, 日本機械学会第72期全国大会講演論文集, Aug. 1994.
205.	Masashi Ichimiya, Yoshiyuki Nakase, Junichiro Fukutomi and Masaaki Fukunaga : 単一突起より発達する乱流くさび内の縦渦構造, 日本機械学会第71期全国大会講演論文集, Vol.C, 485-487, Oct. 1993.
206.	Masashi Ichimiya, Yoshiyuki Nakase, Ikuo Nakamura, Shintaro Yamashita, Junichiro Fukutomi and Shinya Fujii : 順圧力勾配下の乱流境界層の逆遷移, 日本機械学会第70期通常総会講演会講演論文集, Vol.2, 47-49, Mar. 1993.
207.	Masashi Ichimiya, Yoshiyuki Nakase, Junichiro Fukutomi and Masaaki Fukunaga : 平板上の突起より発達する乱流くさびの変動特性, 日本機械学会松山地方講演会講演論文集, 22-24, Nov. 1992.
208.	Masashi Ichimiya, Yoshiyuki Nakase, Junichiro Fukutomi, Katsumi Yamana and Masaaki Fukunaga : 平板上の突起より発達する乱流くさびの平均特性, 日本機械学会第70期全国大会講演論文集, Vol.C, 503-505, Oct. 1992.
209.	Masashi Ichimiya, Yoshiyuki Nakase, Ikuo Nakamura, Shintaro Yamashita, Junichiro Fukutomi and Masaaki Fukunaga : 単一突起下流の乱流くさびの発達過程, 日本機械学会第69期全国大会講演会講演論文集, Vol.B, 218-220, Oct. 1991.
210.	Katsumi Yamana, Masashi Ichimiya, Yoshiyuki Nakase, Ikuo Nakamura, Shintaro Yamashita and Junichiro Fukutomi : 層流境界層中の単一突起による乱流くさびの構造, 日本機械学会中国四国支部第29期総会講演会講演論文集, 294-296, Mar. 1991.
211.	Masashi Ichimiya, Yoshiyuki Nakase, Ikuo Nakamura, Shintaro Yamashita, Junichiro Fukutomi and Takashi Mihara : 順圧力勾配下の急加速乱流境界層の挙動, 日本機械学会鳥取地方講演会講演論文集, 101-103, Nov. 1990.
212.	Masashi Ichimiya, Shintaro Yamashita and Ikuo Nakamura : 軸流中の回転円筒上の境界層に及ぼす単一突起の影響, 日本機械学会第67期通常総会講演会講演論文集, Vol.B, 43-45, Mar. 1990.
213.	Shintaro Yamashita, Masashi Ichimiya, Ikuo Nakamura and Kunihiro Ogiwara : 軸流中の回転円筒上の境界層に及ぼす単一突起の影響, 日本機械学会流体工学部門講演会講演概要集, 81, Nov. 1989.
214.	Shintaro Yamashita, Masashi Ichimiya, Ikuo Nakamura and Kunihiro Ogiwara : 軸流中の回転体境界層に及ぼす単一突起の影響, 日本機械学会東海支部第38期総会講演会講演概要集, 86-87, Mar. 1989.
215.	Shintaro Yamashita, Masashi Ichimiya and Ikuo Nakamura : 軸流中の静止および回転円筒上の境界層に及ぼす単一突起の影響, 日本機械学会関西支部第246回講演会講演概要集, 39, Nov. 1986.

Et cetera, Workshop:

1.	Hiroshi Sakai and Masashi Ichimiya : 二次元混合層の低周波撹乱による乱流遷移, 西日本乱流研究会第28回シンポジウム講演論文集, Aug. 2011.
2.	Hideki Ohno and Masashi Ichimiya : 円管内助走部における孤立乱流塊の発生条件, 西日本乱流研究会第27回シンポジウム講演論文集, Aug. 2010.
3.	Yasushi Fujiwara and Masashi Ichimiya : データ圧縮による境界層流の乱流遷移過程の定量的表示, 西日本乱流研究会第27回シンポジウム講演論文集, Aug. 2010.
4.	Shinya Kamada and Masashi Ichimiya : データ圧縮による自由せん断流の乱流遷移過程の定量的表示, 西日本乱流研究会第27回シンポジウム講演論文集, Aug. 2010.
5.	Masashi Ichimiya : データ圧縮を用いた乱流速度の複雑さ表示, 西日本乱流研究会第27回シンポジウム講演論文集, Aug. 2010.
6.	Hayato Fujimura and Masashi Ichimiya : 円管助走部における強制撹乱による孤立乱流塊の発達, 西日本乱流研究会第26回シンポジウム講演論文集, Aug. 2009.
7.	Yuuki Iwami and Masashi Ichimiya : 自動車モデル形状とその周りの流れの関係(モデル後流の乱流量の特性), 西日本乱流研究会第26回シンポジウム講演論文集, Aug. 2009.
8.	Shinya Kamada and Masashi Ichimiya : 二次元混合層の乱流遷移進行(乱流遷移進行の表示法について), 西日本乱流研究会第26回シンポジウム講演論文集, Aug. 2009.
9.	Yasushi Fujiwara and Masashi Ichimiya : 突起列による平板境界層の乱流遷移(乱流くさび内の乱流量の発達), 西日本乱流研究会第26回シンポジウム講演論文集, Aug. 2009.
10.	Miura Takehiro and Masashi Ichimiya : 周期的撹乱による二次元混合層の乱流遷移, 第55回西日本乱流研究会講演論文集, Aug. 2008.
11.	Nishimura Keishi and Masashi Ichimiya : 突起列による平板上の乱流くさび干渉領域, 第55回西日本乱流研究会講演論文集, Aug. 2008.
12.	Masashi Ichimiya : 自由せん断流の層流-乱流遷移, 西日本乱流研究会創立25周年シンポジウム講演論文集, Aug. 2007.
13.	Masashi Ichimiya and Yusuke Akiyama : 振動時の自動車モデル上の圧力変動, 西日本乱流研究会創立25周年シンポジウム講演論文集, Aug. 2007.
14.	Yusuke Akiyama and Masashi Ichimiya : 振動時の自動車モデル上の圧力変動, 第54回西日本乱流研究会講演論文集, May 2007.
15.	Hayato Matsudaira and Masashi Ichimiya : 円管内助走部の撹乱による乱流遷移, 第54回西日本乱流研究会講演論文集, May 2007.
16.	Masashi Ichimiya : 円管助走部における撹乱による乱流塊の発生, 第52回西日本乱流研究会講演論文集, Apr. 2005.
17.	Takashi Yoshino and Masashi Ichimiya : 円管内の単一突起によって発生する乱流領域の発達, 第22回西日本乱流シンポジウム講演論文集, Aug. 2004.
18.	Masashi Ichimiya : 2次元ノズル下流に形成される混合層の乱流遷移, 第22回西日本乱流シンポジウム講演論文集, Aug. 2004.
19.	Masaki Nakata and Masashi Ichimiya : Sink flow 平板乱流境界層の再層流化現象, 第51回西日本乱流研究会講演論文集, May 2004.
20.	Masashi Ichimiya : 突起列が平板境界層遷移に及ぼす影響, 第21回西日本乱流シンポジウム講演論文集, Sep. 2003.
21.	Tomohiro Abe and Masashi Ichimiya : 単一突起による円管内乱流の発達過程, 第20回西日本乱流シンポジウム講演論文集, Aug. 2002.
22.	Tomoaki Hosobe and Masashi Ichimiya : 平板上の突起列下流に発生する縦渦の特性, 第20回西日本乱流シンポジウム講演論文集, Aug. 2002.
23.	Masashi Ichimiya : 3次元突起による平板層流境界層の乱流遷移, 第20回西日本乱流シンポジウム講演論文集, Aug. 2002.
24.	Yasuaki Shibasaki and Masashi Ichimiya : 再層流化する sink flow 乱流境界層の特性, 第19回西日本乱流シンポジウム講演論文集, Aug. 2001.
25.	Tomoaki Hosobe and Masashi Ichimiya : 平板上の突起から生じる乱流くさび内の縦渦特性, 第48回西日本乱流研究会講演論文集, Apr. 2001.
26.	Chihiro Sudo and Masashi Ichimiya : 突起列から生じる乱流くさび内の縦渦の特性, 第47回西日本乱流研究会講演論文集, Dec. 2000.
27.	Yasuaki Shibasaki and Masashi Ichimiya : Sink flow 乱流境界層の再層流化特性, 第18回西日本乱流シンポジウム講演論文集, Aug. 2000.
28.	Masashi Ichimiya and Chihiro Sudo : 平板上の突起列による乱流遷移, 第45回西日本乱流研究会講演論文集, Dec. 1999.
29.	Yuji Okita, Kyozo Ayukawa, Katsutaka Nakamura, Masashi Ichimiya and Yoshiyuki Nakase : 平板乱流境界層内に設置された傾斜微小フェンスまわりの流れ, 第45回西日本乱流研究会講演論文集, Dec. 1999.
30.	Masashi Ichimiya : 単一突起による平板境界層の乱流遷移機構, 第17回西日本乱流シンポジウム講演論文集, Aug. 1999.
31.	Masashi Ichimiya and Jun Sugihara : 二次元噴流中に設置された円柱後流の構造, 第44回西日本乱流研究会講演論文集, Apr. 1999.
32.	Yuji Okita, Kyozo Ayukawa, Katsutaka Nakamura and Masashi Ichimiya : 平板乱流境界層内に設置された傾斜微小フェンスまわりの流れ, 第43回西日本乱流研究会講演論文集, Dec. 1998.
33.	Masashi Ichimiya : 熱線流速計による層流境界層内の物体周りの流れの計測, 日本機械学会第76期全国大会講演資料集, Vol.6, 215-216, Oct. 1998.
34.	Masashi Ichimiya and Masafumi Kinoshita : Sink flow 乱流境界層の特性, 第14回西日本乱流シンポジウム講演論文集, Aug. 1996.
35.	Masashi Ichimiya : 単一突起下流の乱流くさびの組織構造, 第14回西日本乱流シンポジウム講演論文集, Aug. 1996.
36.	Masashi Ichimiya and Hirotaka Shirai : 再層流化する乱流境界層のフラクタル特性に関する研究, 第38回西日本乱流研究会講演論文集, Apr. 1996.
37.	Masashi Ichimiya and Seiichiro Kondoh : 単一突起の形状の違いが乱流遷移に及ぼす影響, 第38回西日本乱流研究会講演論文集, Apr. 1996.
38.	Masashi Ichimiya : 層流境界層内の乱流くさびの統計的性質, 第13回西日本乱流シンポジウム講演論文集, Oct. 1995.
39.	Masashi Ichimiya and Mikio Yoshikawa : 単一突起下流の乱流くさび内のバースト構造, 第37回西日本乱流研究会講演論文集, Aug. 1995.
40.	Masashi Ichimiya and Mikio Yoshikawa : 順圧力こう配下の再層流化乱流境界層のバーストについて, 第35回西日本乱流研究会講演論文集, Nov. 1994.
41.	Masatake Yokoi and Masashi Ichimiya : 旋回渦の伝熱に与える影響に関する基礎研究, 第12回西日本乱流シンポジウム講演論文集, Jul. 1994.
42.	Masashi Ichimiya : 単一突起から発達する乱流くさび内の縦渦構造, 第12回西日本乱流シンポジウム講演論文集, Jul. 1994.
43.	Keizo Mano and Masashi Ichimiya : 平板上の単一突起下流の乱流くさび内の縦渦特性, 第12回西日本乱流シンポジウム講演論文集, Jul. 1994.
44.	Masashi Ichimiya : 層流境界層内の3次元単一突起より発達する乱流くさびに関する研究, 第34回西日本乱流研究会講演論文集, Apr. 1994.
45.	Masashi Ichimiya : 単一突起より発達する乱流くさび内の縦渦構造, 第11回西日本乱流シンポジウム講演論文集, Aug. 1993.
46.	Masashi Ichimiya : 層流境界層中の単一突起より放出される渦構造の変化, 流体熱工学研究, Vol.27, No.2, 25-33, Jun. 1992. (Summary) 層流境界層の乱流遷移に関する実験的研究である．この遷移は3次元突起列によって強制的に生じさせるものである．層流境界層内に単一の3次元突起が存在すると，その下流にくさび形の乱流領域(乱流くさび)が形成される．この乱流くさび領域の平均·変動速度を熱線風速計とI型熱線プローブを用いて測定し，くさびの輪郭線や広がり角度を明確な定義に基づいて示した．また平均量は突起直後では十分発達しておらず，下流に向かって徐々に発達することが明らかになった．
47.	Masashi Ichimiya : 単一突起下流の乱流くさびの発達過程, 第9回西日本乱流シンポジウム講演論文集, Aug. 1991.
48.	Masashi Ichimiya : 順圧力勾配下の急加速乱流境界層の挙動, 第8回西日本乱流シンポジウム講演論文集, Jul. 1990.
49.	Ikuo Nakamura, Shintaro Yamashita and Masashi Ichimiya : 軸流中の回転円筒上の単一突起による壁後流の構造, 流体熱工学研究, Vol.21, No.2, 27-34, Jun. 1986. (Summary) 軸流中の静止及び回転円筒上の単一突起による乱流遷移に関する実験的研究である．単一突起下流に発生する乱流くさび内の速度を熱線風速計によって測定した．乱流くさびと外側の層流との界面に存在する縦渦がくさびの発達に本質的な役割を果たすことが明らかにされた．平均速度ベクトルはくさびの内·外及びくさび内部において，その大きさ，方向とも大きく変化し，その特徴を極線図で示すことができた．円筒回転時における乱流くさび領域は円筒に巻きつくねじれたものであるが，円筒とともに回転する系から見て，平面に展開すると下流に向かってほぼ直線的に増加した．

Grants-in-Aid for Scientific Research (KAKEN Grants Database @ NII.ac.jp)

Development of a new measure for fluid mixing and diffusion using Kolmogorov complexity (Project/Area Number: 16K06084 )
A new measure using Kolmogorov complexity and its application for fluid mixing and turbulent transition (Project/Area Number: 25420124 )
乱流遷移過程における乱流くさびの特性解明 (Project/Area Number: 08750208 )
平板乱流境界層の再層流化機構の解明 (Project/Area Number: 07750197 )
3次元単一突起による平板境界層の乱流遷移機構の解明 (Project/Area Number: 06750175 )
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Professor : Ichimiya, Masashi

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Grants-in-Aid for Scientific Research (KAKEN Grants Database @ NII.ac.jp)