PhD(Engineering), Osaka University

Lattice Boltzmann Method

Hybrid Simulation

Fluid-Structure Interaction

Compact Finite Difference Method

Computational Fluid Dynamics

Fluid Engineering

格子ボルツマン法

ハイブリッドシミュレーション

流体構造連成解析

数値流体力学

流体工学

Nanotechnology/Materials, Energy chemistry

Aerospace, marine, and maritime Engineering, Aerospace engineering

Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Thermal engineering

Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Fluid engineering

Informatics, High-performance computing

01 Apr. 2011 - 31 Oct. 2012
Doshisha University, Assistant Professor

01 Feb. 2011 - 31 Mar. 2011
Doshisha University, Postdoctoral Research Fellow

01 Apr. 2008 - 31 Jan. 2011
Nagoya Institute of Technology, Postdoctoral Research Fellow

01 Apr. 2007 - 30 Mar. 2008
Nagoya Institute of Technology, Postdoctoral Research Fellow

Apr. 2004 - Mar. 2007
Osaka University, Graduate School, Division of Engineering, Department of Mechanophysics Engineering

01 Apr. 1995 - 31 Mar. 1998
Wakayama Hashimoto High school, 情報理数科, Japan

01 Sep. 2018 - 30 Sep. 2019
実行委員, 日本流体力学会 年会2019 実行委員会, Others, 日本流体力学会が主催し電通大で開催される 年会2019 の実行委員を務めた．

01 Apr. 2018
26th representatives, Japan Society of Fluid Mechanics, Society

01 Apr. 2018
第26期 代議員, 日本流体力学会, Society

01 Apr. 2018
Committee member of Fluid Engineering Division, Japan Society of Mechanical Engineering, Society

01 Apr. 2018
流体工学部門 運営委員, 日本機械学会, Society

01 Mar. 2017 - 31 Aug. 2017
実行委員, 混相流シンポジウム2017 実行委員会, Others, 日本混相流学会が主催し電通大で開催される 混相流シンポジウム2017の 実行委員を務めた．

01 Apr. 2015 - 31 Mar. 2017
Committee member of Fluid Engineering Division, Japan Society of Mechanical Engineering, Society

01 Apr. 2015 - 31 Mar. 2017
流体工学部門 技術委員会 学術・表彰ワーキンググループ 委員, 日本機械学会, Society

01 Apr. 2014 - 31 Mar. 2016
Committee member of Fluid Engineering Division, Japan Society of Mechanical Engineering, Society

01 Apr. 2014 - 31 Mar. 2016
流体工学部門 運営委員, 日本機械学会, Society

01 Apr. 2013 - 31 Mar. 2015
流体工学部門 技術委員会 幹事, 日本機械学会, Society

Apr. 2016
Journal of Chemical Engineering of Japan
Japan
Outstanding Paper Award of 2015 (J.C.E.J), Yuichi Yoshida(Kansai Wire;Netting Co. L;Yohei INOUE (UEC;Atsuko Shimosaka(Doshisha Univ;Yoshiyuki Shirakawa;Jusuke Hidaka
Official journal, Japan

Sound radiated from low Mach number turbulent boundary layer flows (Turbulent boundary layer on a smooth plate and over a small forward facing step)
Shiko Moriyama; Yohei Inoue; Hiroshi Maekawa
JOURNAL OF FLUID SCIENCE AND TECHNOLOGY, JAPAN SOC MECHANICAL ENGINEERS, 16, 2, 2021, High-resolution numerical simulation has been performed to study aeroacoustic noise radiated from a turbulent boundary layer at freestream Mach number Ma = 0.3, which develops on a smooth flat plate and over a small forward-facing step. Sound waves radiated from the turbulent boundary layer on the flat plate are dominant in a very-low-frequency band and have characteristics of a linear sound source. The sound waves are observed in the far-field from the boundary propagate outside of the flow region where small hydrodynamic pressure fluctuations with a significant long-wavelength appear. The instantaneous hydrodynamic pressure fields that gradually develop or decay while moving downstream with the turbulent boundary layer are associated with the evolution of various vortical structures. The characteristics of the sound wave being a linear sound source and dominant in a very-low-frequency band are similar to those of the real high-speed train. The sound waves generated from the turbulent boundary layer over the forward-facing step with a height (SH) of SH/y(+) congruent to 62 are significantly larger in a full frequency band than those radiated from the turbulent boundary layer on the flat plate. Numerical results of the turbulent boundary layer over the forward-facing step with a height of SH/y(+) congruent to 30 show that the sound waves are dominant in the low-frequency band, and also step-specific sound waves are generated in the high-frequency band. Further, even if the step height is SH/y(+) congruent to 7.5, the sound waves unique to the small step are generated in the high-frequency band.
Scientific journal, English

Study of the Interaction between Vortex and a Squire Cylinder with a part of Structure made by Flexible Material
Hiroharu Matsubara; Wataru Nakayama; Yohei Inoue; Hiroshi Maekawa
Proc. 2019 AIAA Aviation Forum, AA, 54, 1-15, 20 Jun. 2019, Peer-reviwed
International conference proceedings, English

Effects of Free Stream Disturbance on the Development of the Compressible Flow around a Square Cylinder at Subsonic Mach Numbers
Yohei Inoue; Tsuyoshi Kanuma; Yuma Tasai; Hiroshi Maekawa
Proc. 2018 AIAA Aviation Forum, AA, 54, 1-15, 29 Jun. 2018, Peer-reviwed
International conference proceedings, English

Effect of Upstream Disturbance on the Develop- ment of a Wall-Bounded Plane Jet at Subsonic Mach Numbers with Separated Flow
Tsuyoshi Kanuma; Keisuke Kuramata; Yohei Inoue; Hiroshi Maekawa
Proc. 2018 AIAA Aviation Forum, FD, 36, 1-15, 27 Jun. 2018, Peer-reviwed
International conference proceedings, English

Transition of a compressible square cylinder wake structures subjected to free-stream disturbance
Yuma TASAI; Yohei INOUE; Tsuyoshi KANUMA; Hiroshi MAEKAWA
Proceedings of APS March Meeting 2018, L, 60, 340-340, 06 Mar. 2018, Peer-reviwed
Symposium, English

Interaction between Flexible Structure and Compressible Flow
Hiroharu MATSUBARA; Yohei INOUE; Hiroshi MAEKAWA
Proceedings of APS March Meeting 2018, G, 60, 348-348, 05 Mar. 2018, Peer-reviwed
Symposium, English

Transitional structures of a compressible square cylinder wake subject to free-stream disturbance
Yohei INOUE; Yuma TASAI; Tsuyoshi KANUMA; Hiroshi MAEKAWA
Proceedings of the 61st Workshop on "Investigation and Control of Transition to Turbulence", 1, 1, 3-3, 21 Sep. 2017
Symposium, English

Numerical Investigation of the Compressible Flow around a Bluff Body: the Immersed Boundary Method of Body Force Type
Yohei Inoue; Yuma Tasai; Hiroshi Maekawa
Proc. 13th International Conference on Flow Dynamics (ICFD2016), 1, 1, OS13-14, 12 Oct. 2016, Peer-reviwed
International conference proceedings, English

Numerical Simulation of the Development of Linear Unstable Modes in a Supersonic Boundary Layer
Maseru Yoshino; Kazuhiro Suda; Hiroshi Maekawa; Yohei Inoue
Proc. 13th International Conference on Flow Dynamics(ICFD02016), 1, 1, OS13-9, 10 Oct. 2016, Peer-reviwed
International conference proceedings, English

A STUDY OF SUPERCRITICAL TRANSITIONAL STRUCTURES OF A BOUNDARY LAYER TRIPPED BY FINITE HEIGHT OBSTACLES PERIODICALLY ARRAYED IN SPAN
Sae Takahashi; Yohei Inoue; Hiroshi Maekawa
Proc. 27th International Symposium on Transport Phenomena (ISTP-27), ISTP27, No. 174, 17 Sep. 2016, Peer-reviwed
International conference proceedings, English

Turbulent boundary layer with a linear velocity profile far from a wall generated by functional Riblets
Yuko TORIUMI; Yohei INOUE; Hiroshi MAEKAWA
International Symposium on Near-Wall Flows: Transition and Turbulence, 1, 1, PS-14, 21 Jun. 2016, Peer-reviwed
International conference proceedings, English

Effects of near-boundary filters on computations of aerodynamic sound generated by vortical flows near a wall
Yuki WAKAMATSU; Hiroaki WATANABE; Yohei INOUE; Hiroshi MAEKAWA
Nagare, Japan Society of Fluid Mechanics, 34, 6, 433-444, Dec. 2015, Peer-reviwed, 本研究は,境界近傍におけるフィルタの取り扱いが空力音の数値計算に与える影響を渦と壁面との干渉によって発生する空力音を用いて明らかにした.Visbal and Gaitonde(AIAA Paper,(1998))の低次精度コンパクトフィルタおよびGaitonde and Visbal(AIAA Journal,(2000))の6次精度以上の境界コンパクトフィルタを境界近傍のフィルタに適用した場合の空力音計算での問題点を示し,適切と考えられる境界近傍のフィルタリング手法を示した.Compact schemes combined with compact filters are widely used for computational aeroacoustics. As compact filters require special treatment near the boundaries, near boundary filters were proposed by Visbal and Gaitonde (AIAA Paper, (1998)) and Gaitonde and Visbal (AIAA Journal, (2000)). However, these proposed near-boundary filter formulas have several drawbacks, the influence on computations of aerodynamic sound has not been uncovered. In this paper, we focus on the effects of these filters at the near-boundary points on the accurate calculation of aerodynamic sound generated by vortical flows near a wall. The results reveal that the appropriate filtering at the near-boundary nodes with no adverse impact on stability is essential to compute aerodynamic sound. The application of high-order boundary formulas such as 6^ order boundary compact filtering is not appropriate because of an incorrect vortex motion and resultant spurious sound fields. A higher order boundary compact filter is not necessarily suitable for computations of aerodynamic sound due to its spectral function. In the case of using lower order centered filtering formulas approach, the value of a free parameter of the filter and the grid resolution have a serious influence on the computation of aerodynamic sound. Two appropriate filters at the near-boundary are presented.
Scientific journal, Japanese

Effect of Aperture Structure of Dutch Weave Mesh on Flow Resistivity
Yuichi Yoshida; Yohei Inoue; Atsuko Shimosaka; Yoshiyuki Shirakawa; Jusuke Hidaka
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, SOC CHEMICAL ENG JAPAN, 48, 9, 730-741, Sep. 2015, Peer-reviwed, Plain Dutch weave and twilled Dutch weave meshes are superior filter media in terms of their high mechanical strength and tiny apertures. However, because they have high flow resistivity due to their complex flow paths, it is crucial to predict the pressure drop with high accuracy for a filtration process. We, therefore, investigated the effect of the aperture structure of a Dutch weave mesh on the flow resistivity. First, we proposed a calculation model for estimating the aperture size of a twilled Dutch weave mesh to thoroughly understand the aperture structure; whereas, the aperture structure of a plain Dutch weave mesh has already been clarified. Next, numerical simulations were performed using a combination of the lattice Boltzmann and immersed boundary methods. It was found that the drag force of the Dutch weave mesh increased at the inside aperture where the volume fraction increased, and in the twilled Dutch weave mesh, the drag force at the center also varied with the local torsion of the flow path. Based on these findings, we derived an equation for estimating the pressure drop across the Dutch weave mesh, and experimentally verified its validity. This enables a rational and highly accurate prediction of the pressure drop.
Scientific journal, English

FLOW AROUND A PLATE BEHIND A CAVITY IN A BOUNDARY LAYER
Yohei Inoue; Masahiro Suzuki; Hiroshi Maekawa; Hajime Takami
Proceedings of the ASME-JSME-KSME Joint Fluids Engineering Conference 2015, 2015, 1, 12314-1-12314-2, 26 Jul. 2015, Peer-reviwed
International conference proceedings, English

Numerical Simulation of Flow Resistivity of Metal Woven Mesh
Yuichi Yoshida; Yohei Inoue; Atsuko Shimosaka; Yoshiyuki Shirakawa; Jusuke Hidaka
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, SOC CHEMICAL ENG JAPAN, 48, 7, 545-555, Jul. 2015, Peer-reviwed, The accurate estimation of the pressure drop across a metal woven mesh is crucial for a filtration process. We therefore investigated the effect of the geometrical characteristics, namely, the weave type (plain weave and twilled weave), wire diameter, and number of meshes (number of wires per inch), on the flow resistivity. This was done by hybrid simulation using a combination of the lattice Boltzmann and immersed boundary methods (IB-LBM). It was found that, for a given aperture size of the woven mesh, the volume fraction increased with increasing wire diameter, with a consequent increase in the drag force. The volume fraction of the twilled weave mesh was bimodally distributed in the thickness direction, with the drag force at the second peak of the distribution lower than that at the first peak owing to the resistive loss at the first peak. This tendency became more pronounced with increasing Reynolds number. Based on these findings, we derived an equation for estimating the pressure drop, wherein the drag coefficient is expressed as a function of the volume fraction and Reynolds number. Based on the proposed equation, the relationship among the drag coefficient, volume fraction, and Reynolds number calculated from the experimentally determined pressure drop across the woven mesh was plotted as a single curve for each weave type. This enabled rational and highly accurate prediction of the pressure drop across the plain weave and twilled weave meshes.
Scientific journal, English

Effects of boundary schemes on computations of acoustic waves generated by vortical flows near a wall
Yuki WAKAMATSU; Hiroaki WATANABE; Yohei INOUE; Hiroshi MAEKAWA
Transactions of the JSME (in Japanese), The Japanese Society of Mechanical Engineers, 81, 823, 14-00544-1-20, Mar. 2015, Peer-reviwed, In this paper, direct numerical simulations of the sound from vortex dipole rebound from an adiabatic non-slip wall are performed to investigate the impacts of the boundary schemes combined with the 6^th order compact scheme on the capability of capturing the acoustic waves generated by vortical flows near a wall. The free parameter of the compact filter α=0.45 and α=0.49 are chosen to clarify effects of boundary schemes in high wave number region. Results show that some boundary schemes make the computations unstable and high order boundary schemes are not always appropriate. It is found that in the case of α=0.45, no remarkable difference is found in the results computed by each boundary scheme. On the other hand, in the case of α=0.49, the vorticity of vortex dipole almost does not depend on the each scheme. However, the vorticity of secondary vortex on the wall computed depends on the each boundary scheme and spatial resolution. This causes large difference in the distributions of vorticity and sound waves. It is therefore clearly understood that the characteristics of the first derivative of the boundary schemes combined with the 6^th order compact scheme in the high wave number band affect the capability to precisely capture the aerodynamic sound. When the compact filters free parameter is chosen to be α=0.49, the boundary schemes have a strong influence on the computation of aerodynamic sound. Special attention to a combination of boundary and compact schemes is required to perform accurate computations of aerodynamic sound generated by flows near a wall.
Scientific journal, Japanese

Dynamic Analysis and Optimization of Soft Robotic Fish Using Fluid-Structural Coupling Method
WenJing Zhao; AiGuo Ming; Makoto Shimojo; Yohei Inoue; Hiroshi Maekawa
Journal of Robotics and Mechatronics, 26, 5, 638-648, 01 Oct. 2014, Peer-reviwed
Scientific journal, English

Fluid-Structure Interaction Analysis of a Soft Robotic Fish Using Piezoelectric Fiber Composite
Wenjing Zhao; Aiguo Ming; Makoto Shimojo; Yohei Inoue; Hiroshi Maekawa
Journal of Robotics and Mechatronics, 26, 5, 638-648, May 2014, Peer-reviwed
Scientific journal, English

EFFECT OF METAL WOVEN MESH STRUCTURES ON PRESSURE DROP
Y. Yoshida; Y. Inoue; A. Shimosaka; Y. Shirakawa; J. Hidaka
9th European Congress of Chemical Engineering, 9035, 24 Apr. 2013, Peer-reviwed
International conference proceedings, English

Numerical simulation of the pressure drop across filter media with considering a difference of geometric structures
Yohei INOUE; Yuichi YOSHIDA; Atsuko SHIMOSAKA; Yoshiyuki SHIRAKAWA; Jusuke HIDAKA
The 5th Asian Particle Technology Symposium (APT2012), 170, 04 Jul. 2012, Peer-reviwed
International conference proceedings, English

Effects of finite mass ratio and inelastic reflection on the interaction between graphene and laminar flow
Yohei Inoue; Toshiyuki Gotoh
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, ROYAL SOC, 369, 1945, 2431-2438, Jun. 2011, Peer-reviwed, A modified boundary condition for the distribution function in the Lattice Boltzmann method at the interface between solid and fluid that takes into account a finite mass ratio between two phases and an inelastic reflection is proposed. The new boundary condition is built into the immersed boundary method to compute the interaction between graphene and laminar flow. Numerical simulations are carried out at a Reynolds number of 40, and drag and lift acting on the graphene and its deformation are examined by changing the mass ratio and the coefficient of restitution. It is found that the amplitude of the oscillating motion of the graphene is enhanced when compared with the case of infinite mass ratio with perfect collision.
Scientific journal, English

Numerical Simulation of Fluid Induced Vibration of Graphenes at Micron Scales
Y. Inoue; R. Kobayashi; S. Ogata; T. Gotoh
CMES-COMPUTER MODELING IN ENGINEERING & SCIENCES, TECH SCIENCE PRESS, 63, 2, 137-161, Jul. 2010, Peer-reviwed, Vibration of a single graphene and a pair of graphenes at micro meter scale induced by air flow is numerically simulated and examined by using a hybrid computational method starting from a microscopic level of description for the graphene. In order to bridge a huge gap in spatial and time scales in their motions, the carbon atoms of the graphene are represented by a small number of coarse grained particles, the fluid motion is described by the lattice Boltzmann equation and the momentum exchange at the boundary is treated by the time averaged immersed boundary method. It is found that a single graphene with attack angle 60 degrees and 90 degrees to the flow direction begins to bend downstream with oscillation after release and tends to attain an equilibrium form, but the oscillation amplitudes for 30 degrees increases in time. Also found is that when the separation distance of a pair of graphenes increases, the oscillation amplitudes become larger and chaotic and they collide each other, and the vorticity fields also tend to develop complex pattern. Strain distribution inside the graphene is also computed. Possibility to use the present system as a flow sensor and further development of the hybrid computational method are discussed.
Scientific journal, English

Multiscale Numerical Simulation of Fluid-Solid Interaction
Yohei Inoue; Junji Tanaka; Ryo Kobayashi; Shuji Ogata; Toshiyuki Gotoh
MATERIALS TRANSACTIONS, JAPAN INST METALS, 49, 11, 2550-2558, Nov. 2008, Peer-reviwed, A new multiscale numerical method is developed to simulate the fluid-solid interaction. The solid motion is described by coarse grained particles which are generated by consolidation of harmonically interacting atoms, and the fluid motion is by the lattice Boltzmann method. Since the characteristic time of the fluid motion is much longer than that of the coarse grained particles, the momentum change due to the rapid collision of the coarse grained particles at the interface is accumulated over a certain time duration and then passed the fluid motion. The method is applied to an elastic rod fixed on the wall in the two dimensional Poiseuille flow. The oscillation and stress within the rod as well as the velocity and vorticity of the fluid are examined with respect to the vortex shedding at the top of the rod. Also the method is applied to the problem of fluid transfer by multiple elastic rods. It is found that the results are quite reasonable and that the present method is effective in dealing with the fluid-solid interactions. [doi:10.2320/matertrans.MB200814]
Scientific journal, English

Numerical Investigation of Turbulent Flows in a Rotating Channel: Transient State After the Onset of Rotation
Yohei INOUE; Takeo KAJISHIMA
Journal of Fluid Science and Technology, Japan Society of Mechanical Engineers, 2, 3, 633-642, 2007, Peer-reviwed
Scientific journal, English

Numerical investigation of transient state of developing flows in a rotating channel
Yohei Inoue; Takeo Kajishima
Proceedings of the 11th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC-11, 2, 673-679, 2006, The direct numerical simulations of turbulent flow in a rotating channel are executed, with the attention on a transient state after an onset of the rotation. Some different rotation numbers, which contain zero, weak, middle-range and strong rotation cases, are tested. Both temporal evolution of flows and instantaneous flow fields are investigated to clarify a correlation between the rotation rate and the alteration of vortical structures in the channel. In this study, we indicate some turbulent statistics (e.g. flow-rate, friction stresses on both walls, turbulence energy and Reynolds stress) to reveal the transient state. Then we applied an analytical method based on the theory of the invariants of Reynolds stress tensor to associate the status of turbulence with vortical structures. Finally, we discuss the relationship between large-scale vortical structures and heat/mass transfer in a rotating frame. Direct Numerical Simulation, Rotating Channel, Transient State, Turbulence Structures. Copyright © 2006 by ASME.
International conference proceedings, English

Numerical Investigation on the transient state of the turbulence structures in the rotating channel
Yohei INOUE; Takeo KAJISHIMA
JSME Transactions Ser. B, Japanese Society of Mechanical Engineers, 72, 724, 2933-2939, 2006, Peer-reviwed
Scientific journal, Japanese

Numerical investigation on large-scale structure and statistics in turbulent flow in a rotating channel
Yohei Inoue; Takeo Kajishima; Takashi Ohta
Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Japan Society of Mechanical Engineers, 70, 695, 1665-1672, 2004, Peer-reviwed, Fully-developed flow in a channel subjected to the spanwise rotation was investigated by means of the direct numerical simulation (DNS). Two steps of rotation number, Roτ = 1 and Roτ=2.5, and stationary condition were mainly calculated. The turbulence was enhanced in the pressure side and attenuated in the suction side by increasing the rotation number, but the change was not monotonic. Notable feature was found for the case of Roτ ≈ 1: the flow rate takes its maximum
it fluctuated in time
the shift of Reynolds shear stress almost teminated. For higher rotation rate, roll-cell vortices and, as a consequence, the constant-gradient in the mean velocity profile were observed. Furthermore, the log profile was evident only in the region blown from the pressure side by the roll-cell vortices. Due to these observations, it was found that the rotation number 'unity' was a turning point of the change of dominant structures: the near-wall vortices in lower rotation and the large-scale roll-cell vortices in higher.
Scientific journal, Japanese

Numerical simulation of large scale structures and statistics in the rotating channel
Yohei INOUE; Takeo KAJISHIMA; Takashi OHTA
JSME Transactions Ser. B, Japanese Society of Mechanical Engineers, 70, 695, 1665-1672, 2004, Peer-reviwed, Fully-developed flow in a channel subjected to the spanwise rotation was investigated by means of the direct numerical simulation (DNS). Two steps of rotation number, Ro_τ=1 and Ro_τ=2.5, and stationary condition were mainly calculated. The turbulence was enhanced in the pressure side and attenuated in the suction side by increasing the rotation number, but the change was not monotonic.Notable feature was found for the case of Ro_τ≈ 1 : the flow rate takes its maximum ; it fluctuated in time ; the shift of Reynolds shear stress almost teminated. For higher rotation rate, roll-cell vortices and, as a consequence, the constant-gradient in the mean velocity profile were observed. Furthermore, the log profile was evident only in the region blown from the pressure side by the roll-cell vortices. Due to these observations, it was found that the rotation number 'unity' was a turning point of the change of dominant structures : the near-wall vortices in lower rotation and the large-scale roll-cell vortices in higher.
Scientific journal, Japanese

Sound radiation by a vortex pair moving near a rectangular cylinder.
KANUMA Tsuyoshi; INOUE Yohei; MAEKAWA Hiroshi
The sound generated by a vortex pair moving close to a rectangular cylinder is studied by high-resolution simulations of the two-dimensional unsteady compressible Navier-Stokes equations at Mach numbers ranging from 0.05 to 0.3. In this study, the Mach number Ma is defined by Ma=V_t /c₀, where V_t is the translation velocity of the co-moving vortex pair and c₀ denotes the speed of sound. The directly computed far-field sound is compared to the prediction of the acoustic analogy proposed by Lighthill (1952) and Curle (1955). The prediction is in excellent agreement with the simulation, where the two-dimensional form of Curle’s modified solution is adopted for an accurate calculation of the sound waves with a phase difference between various vortices around the cylinder. It could be confirmed that the scaling law in two dimensions holds in this simulation. In this study, the sound generation due to the dipole and quadrupole fields is investigated by calculating the two terms in Curle’s analogy. Examining the surface distribution of dipoles on the cylinder indicates that the force exerted on the fluid by the solid boundaries of the side/upper wall of the rectangular cylinder generates the sound when the co-translating vortices approach /pass the rectangular cylinder, which is the sound due to dipoles corresponding to the directivity of the sound in the polar diagrams. The area distribution of quadrupoles which is the second time derivative of the area integral of Lighthill’s stress tensor indicates that the sound is emitted from a vortex generated at the corner of the rectangular cylinder when the vortex pair approaches the cylinder and where the interaction between many vortices around the cylinder and the co-translating vortices generates the sound when the co-translating vortices pass the cylinder., The Japan Society of Mechanical Engineers, 2023, Transactions of the JSME (in Japanese), 89, 917, 22-00223-22-00223, Japanese, 2187-9761

Aeroacoustic Noise Generated by Air Flowing through a Slit in an HVAC System
井上 洋平; 前川 博
2019, Proc. World Congress and Exhibition, HX/0062, 1-8, Peer-reviwed

Sound Radiated from Low Mach Number Turbulent Boundary- layer Flows (Turbulent Boundary Layer On a Smooth Plate and Over a Forward Facing Step)
井上 洋平; 前川 博
2019, Proc. 16th International Conference of Fluid Dynamics, 1, 1-2, Peer-reviwed

Investigation and Control of Transition to Turbulence
井上 洋平
2017, Proceedings of 61st Workshop on Investigation and Control of Transition to Turbulence, 1, 1-18, Peer-reviwed, with international co-author(s)

J1050202 The acoustic field and surface shear-stress generated by vortex wall interaction
WAKAMATSU Yuki; WATANABE Hiroaki; INOUE Yohei; MAEKAWA Hiroshi
Surface shear stress is generated by flows near a solid object. For several decades, whether surface shear stress fluctuation is a sound source or not has been discussed. On the one hand, Howe insisted that surface shear stress fluctuation is not a sound source. But on the other hand, Shariff and Wang claimed that shear stress fluctuation is a sound source by numerical simulation. In this paper, surface shear stress fluctuation is studied on the condition that shear stress fluctuation is a sound source. We computed the time evolution of surface shear-stress caused by vortex pair colliding with a non-slip wall. It is revealed that surface shear-stress fluctuation is influenced by secondary vortex on the wall very much. An absolute value of surface shear-stress is increased when a vortex pair approaches the wall because of an increase of an absolute value of vorticity of secondary vortex. After, an absolute value of surface shear-stress is decreased and the position of maximum value of an absolute value of surface shear stress is changed because the vortex pair is separated with secondary vortex. This surface shear-stress fluctuation mechanism might be a one of the sound source., The Japan Society of Mechanical Engineers, 2015, The Proceedings of Mechanical Engineering Congress, Japan, 2015, _J1050202--_J1050202-, Japanese, 2424-2667, 110010049172

1508 Extraction of characteristic vortex structures in a rough wall turbulent boundary layer by the simultaneous measurement of the flow field and the wall shear stress fluctuation, and the wall pressure fluctuation
Hirata Takumi; Maekawa Hiroshi; Inoue Yohei; Takami Hajime
The relationships between characteristic vortical structures and the wall surface pressure fluctuations in a rough wall turbulent boundary layer with zero pressure gradient are investigated by means of laboratory experiments using a wind tunnel and velocity, shear stress, and wall pressure measurements. To investigate the relationships mentioned above, simultaneous measurements of the streamwise flow velocity near the wall, the wall shear stress fluctuations, and the wall pressure fluctuations were carried out using an I-type hot-wire probe, a near-wall hot-wire probe and a microphone pressure sensor. Characteristic vortical structures are presented by the wall typical pressure fluctuations time history distributions obtained by using conditional sampling methods of the wall-shear stress maximum value and its interval., The Japan Society of Mechanical Engineers, 2015, The Proceedings of the Fluids engineering conference, 2015, _1508-1_-_1508-3_, Japanese, 2424-2896, 110010047274

J0550103 Turbulent boundary structure behind a functional riblet with charactalistic scales
TORIUMI Yuko; INOUE Yohei; MAEKAWA Hiroshi
Turbulent boundary layer structures behind a functional riblet with multiple characteristic scales are investigated by means of a hot-wire technique. The functional riblet employs two characteristic scales of the turbulent boundary layer, where the riblet trapezoidal lower and straight higher combs carrying streamwise grooves reach the buffer and logarithmic layers of the boundary layer, respectively. The turbulent boundary layer profile behind the higher comb shows a friction reduction rate up to 41 %, because the velocity distribution near the wall has a linear profile normal to the wall. Whilst the boundary layer profile behind the lower comb indicates an ordinary friction reduction rate of about 5%. The turbulent boundary layer structures measured far downstream behind the functional riblet indicate how the modified boundary layer develops downstream., The Japan Society of Mechanical Engineers, 2015, The Proceedings of Mechanical Engineering Congress, Japan, 2015, _J0550103--_J0550103-, Japanese, 2424-2667, 110010048955

107 Study on the flow around a flat plate associated with the cavity flow in the boundary layer
SUZUKI Masahiro; INOUE Yohei; MAEKAWA Hiroshi; TAKAMI Hajime
The Japan Society of Mechanical Engineers, 17 Nov. 2014, Symposium on Environmental Engineering, 2014, 24, 22-23, Japanese, 110009964634, AA11901271

1408 Application of high-resolution WCNS to fundamental flow simulations with a strong shock
SATO Shohei; Zuo Zhifeng; Inoue Yohei; Maekawa Hiroshi
We conduct a detailed evaluation of a WCNS with Roe's FDS or a simple low-dissipation advection scheme for fundamental flow simulations with a strong shock wave. A shock-boundary layer interaction, where the boundary layer undergoes transition to turbulence, and the interaction with a strong shock wave and a strong vortex have been performed. The numerical results are compared with experimental and previous DNS/WENO numerical results., The Japan Society of Mechanical Engineers, 25 Oct. 2014, Fluids engineering conference ..., 2014, "1408-1"-"1408-5", Japanese, 1348-0251, 110009938785, AA11284390

S0510105 Interaction between jet and vortices in the flow past a bluff body
INOUE Yohei; HIRATA Takumi; SUZUKI Masahiro; MAEKAWA Hiroshi
Numerical and experimental investigation of the interaction between jet and vortices in the flow past a bluff body were reported. The immersed boundary method of body force type was applied to the interface of the fluid and bluff body. Smoke-wire visualization and numerical solutions were qualitatively in accord about vortical structures: spreading of the vortical structures in the wall-normal directions is narrowed when the jet from the tail of the bluff body is enabled. Result of numerical solution also shows that the pressure difference between the vortex core and around in the wake region decreases in the case that end-tail jet is enabled., The Japan Society of Mechanical Engineers, 07 Sep. 2014, Mechanical Engineering Congress, Japan, 2014, "S0510105-1"-"S0510105-3", Japanese, 110009945101, AA12588255

G0702 Investigations of the flow around rectangular wings placed near the cavity
INOUE Yohei; FUJITA Sho; SUZUKI Masahiro; MAEKAWA Hiroshi
Numerical investigation of the flow around rectangular wings placed near the cavity is studied by the immersed boundary method with body force type. Two cases of angle of attack, θ=90° and θ=60°, were tested with Re=1000 based on the width of the rectangular wing and inlet speed. In the case of θ=90°, the asymmetric vortical structures grow at the downstream, and the backflow region is found behind the wing. In the case of θ=60°, however, vortical structures become weakened and backflow region at the back of the wing disappears mostly due to the blowing from the cavity., The Japan Society of Mechanical Engineers, 09 Nov. 2013, Fluids engineering conference ..., 2013, "G0702-01"-"G0702-02", Japanese, 1348-0251, 110009957606, AA11284390

新しい粒子—流体混相系シミュレーション法の開発と濾過操作の精密設計
井上洋平
天野工業技術研究所, 01 Oct. 2012, 天野工業技術研究所平成23年度年次報告, 67-72, Japanese, Invited, Introduction other

25aTC-5 Effects of mass ratio on fluid-solid interaction
Inoue Yohei; Kobayashi Ryo; Ogata Shuji; Gotoh Toshiyuki
The Physical Society of Japan, 2011, Meeting Abstracts of the Physical Society of Japan, 66.1.2, 278, Japanese, 2189-0803, 110008610709

22pEJ-4 Numerical simulation of fluid-solid interaction of microscale structure
Inoue Yohei; Minoura Yasuhiro; Gotoh Toshiyuki
The Physical Society of Japan, 2010, Meeting Abstracts of the Physical Society of Japan, 65.1.2, 337, Japanese, 2189-0803, 110007655216

104 Fluid-Solid Hybrid Simulation of the Interaction between Fluids and the Graphenes
INOUE Yohei; KOBAYASHI Ryo; OGATA Shuji; GOTOH Toshiyuki
The Japan Society of Mechanical Engineers, 2009, The Proceedings of The Computational Mechanics Conference, 2009.22, 376-377, Japanese, 2424-2799, 110008702266

Hybrid simulation of the interaction between microscale structures and fluids
INOUE Yohei; KOBAYASHI Ryo; OGATA Shuji; GOTOH Toshiyuki
Hydrodynamics in micro/nano-scales, so-called ``micro/nano-fluidics'',
has been attracting the attention in engineering and bio/chemical sciences
for resent years.
Especially, fluid-solid interactions (FSI) in such scales play a key role in
fluid locomotion and measurements in micro-devices such as MEMS and lab-on-a-chip.
In order to simulate FSI in micro/nano-scales we propose a hybrid simulation technique
which is composed of the following schemes:
the coarse grained particle method for solid motion,
the lattice Boltzmann method for fluid region,
and the immersed boundary method at the moving interface.
In this report, we present some results of the simulation
of the flow around moving microscale structure(s)., National Committee for IUTAM, 2009, NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan, 58, 138-138, Japanese, 130004604214

26pQC-2 Hybrid simulation of the interaction between microscale films and fluid
Inoue Yohei; Kobayashi Ryo; Ogata Shuji; Gotoh Toshiyuki
The Physical Society of Japan, 2009, Meeting Abstracts of the Physical Society of Japan, 64.2.2, 188, Japanese, 2189-0803, 110007496637

27aTK-2 Hybrid Simulation of Fluid-Solid Interaction on Microscale Structures
INOUE Yohei; KOBAYASHI Ryo; OGATA Shuji; GOTOH Toshiyuki
The Physical Society of Japan, 2009, Meeting Abstracts of the Physical Society of Japan, 64.1.2, 265, Japanese, 2189-0803, 110007370687

Numerical investigation of the interaction between microscale deformable objects and fluids using coarse-graind particle method and lattice Boltzmann method
TANAKA Junji; INOUE Yohei; GOTOH Toshiyuki; OGATA Shuji
We propose a hybrid simulation technique
in order to investigate fluid-structure(solid)
interaction probrem in micro/nano scales
that attract a great deal of attention in recent years.

This technique is conposed of three steps:
the coarse grained particle method for solid motion,
the lattice Boltzmann method for fluid region,
and the immersed boundary method at the moving interface.

In this report, we present some results of the simulation
of the flow around moving microscale objects., National Committee for IUTAM, 2008, NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan, 57, 225-225, Japanese, 130004604024

20aVB-1 Numerical Simulation on Kelvin-Helmholtz Instabillity of Multigrid
Menjo Yusuke; Inoue Youhei; Gotoh Toshiyuki
The Physical Society of Japan, 2008, Meeting Abstracts of the Physical Society of Japan, 63.2.2, 193, Japanese, 2189-0803, 110006983094

20aVB-4 Time development of two-phase system in shearing flowfield
Nonogaki Akinori; Inoue Youhei; Gotoh Toshiyuki
The Physical Society of Japan, 2008, Meeting Abstracts of the Physical Society of Japan, 63.2.2, 194, Japanese, 2189-0803, 110006983097

AM05-12-018 Relations between Reynolds stress tensor and turbulence structures in a rotating channel
INOUE Yohei; KAJISHIMA Takeo; OHTA Takashi
The direct numerical simulation of turbulent flow in a rotating channel is executed. Especially, We discuss relations between the second and third invariants of Reynolds stress tensor and alteration of vortical structures in the channel. In this study, some different rotation numbers are tested, and both transient states -after the onset of rotation- and fully-developed states are investigated. In case of fully-developed states, three-dimensionality of flow is enhanced on the pressure side in proportion to the increases in the rotation number, and the flow indicates two-dimensionality on the suction side. At a transient state, the flows denote the same tendencies of those of fully developed state. In case of high rotation number, however, turbulence states become unstable on the suction side., 日本流体力学会, 2005, 日本流体力学会年会講演論文集, 2005, 157-157, Japanese, 110008458476, AA11567941

On the Prediction of Re-Laminarization in Suction Side of Rotating Channel Flow by LES and DNS
NOMACHI Takayuki; INOUE Youhei; KAJISHIMA Takeo; OHTA Takashi
Fully developed turbulent flow in a rotating channel is simulated numerically using LES and DNS. Especially, prediction of re-laminarization at suction side is discussed. Our SGS model of one-equation dynamic type is compared with the conventional Smagorinsky model. The representation of subgrid scale turbulence in the vicinity of the suction side is significantly improved by our model in comparison with Smagorinsky model. Agreement with DNS database is also satisfactory., The Japan Society of Mechanical Engineers, 2003, 関西支部講演会講演論文集, 2003, 78, "14-1"-"14-2", Japanese, 110002493963, AN00360659

Multiphysics Simulation on Design and/or Analysis of Heat Exchanger.
Yohei INOUE
Public discourse, Japanese, 日本冷凍空調学会「環境変化に対応するための先進熱交換技術に関する調査研究」第4回委員会, Invited, Japan Society of Refrigerating and Air Conditioning Engineers, University of Electro-Communications, Domestic conference
01 Mar. 2019

Effect of upstream disturbance on the flow of a wall-bounded plane jet
Yohei INOUE; Tsuyoshi KANUMA; Hiroshi MAEKAWA
Oral presentation, Japanese, 32nd CFD symposium, Japan Society of Fluid Mechanics, Kikai Shinko Kaikan Building, Domestic conference
12 Dec. 2018

Numerical Simulation of Acoustic Wave Emanated from Transitional Vortex Structures in a Low-Subsonic Boundary Layer
Shikou MORIYAMA; Yohei INOUE; Hiroshi MAEKAWA
Oral presentation, Japanese, 32nd CFD symposium, Japan Society of Fluid Mechanics, Kikai Shinko Kaikan Building, Domestic conference
12 Dec. 2018

Relationship between Drag Force Exerted on the Bluff Body and Modification of Wake Structures by a Jet Flow
Yohei INOUE; Hiroshi MAEKAWA
Oral presentation, Japanese, 31st CFD symposium, Japan Society of Fluid Mechanics, Kyoto Institute of Technology, Domestic conference
13 Dec. 2017

Various solid wall boundary conditions in Compressible Fluid
Hiroharu MATSUBARA; Wataru NAKAYAMA; Yohei INOUE; Hiroshi MAEKAWA
Oral presentation, Japanese, 31st CFD symposium, Japan Society of Fluid Mechanics, Kyoto Institute of Technology, Domestic conference
13 Dec. 2017

鈍体に設置された噴流による後流構造の変化
井上洋平; 前川博
Oral presentation, Japanese, 日本流体力学会 年会2017, JSFM, Katsushika Campus, Tokyo University of Science, Domestic conference
30 Aug. 2017

Three dimensional vortical structures formed at the back of an isolated plate set in a boundary layer and breakdown
Yohei INOUE; Naoto HOZUMI; Hiroshi MAEKAWA
Oral presentation, Japanese, The 60th workshop on "investigation and Control of Transition to Turbulence", 乱流遷移の解明と制御研究会, University of Electro-Communications, Domestic conference
28 Mar. 2017

A fluid structure interaction analysis model suitable for an elastic-deformable wing.
Yohei INOUE; Hinoharu MATSUBARA; Hiroshi MAEKAWA
Oral presentation, Japanese, 23rd conference of the JSME-Kanto branch., Japan Society of Mechanical Engineers, Katsushika campus, Tokyo University of Science, Domestic conference
17 Mar. 2017

DNS of Transitional structures of a compressible square cylinder wake subject to free-stream disturbance
Yuma TASAI; Yohei INOUE; Hiroshi MAEKAWA
Oral presentation, Japanese, 30th CFD symposium, Japan Society of Fluid Mechanics, Tower Hall Funabori (Convention center), Domestic conference
13 Dec. 2016

Numerical Simulation of the subsonic flow around a square cylinder
Yuma TASAI; Yohei INOUE; Hiroshi MAEKAWA
Oral presentation, Japanese, JSFM Annual Meeting 2016, Japan Society of Fluid Mechanics, Gokiso campus, Nagoya Institute of Technology, Domestic conference
27 Sep. 2016

Fluid Force acting on the flat plate placed in the boundary layer
Yohei INOUE; Naoto HOZUMI; Hiroshi MAEKAWA
Oral presentation, Japanese, JSFM Annual Meeting 2016, Japan Society of Fluid Mechanics, Gokiso campus, Nagoya Institute of Technology, Domestic conference
27 Sep. 2016

Fluid force acting on the plate placed at a wall boundary layer
Naoto HOZUMI; Yohei INOUE; Hiroshi MAEKAWA
Oral presentation, Japanese, The 59th workshop on "investigation and Control of Transition to Turbulence", 乱流遷移の解明と制御研究会, Hokkaido University, Domestic conference
05 Sep. 2016

Evolution of unsteady finite-amplitude perturbations in a hypersonic boundary-layer
Kazuhiro SUDA; Yohei INOUE; Hiroshi MAEKAWA
Oral presentation, Japanese, 29th CFD Symposium, Japan Society of Fluid Mechanics, Chikushi campus, Kyushu University, Domestic conference
17 Dec. 2015

The immersed boundary method of body force type for compressible flow analysis
Yohei INOUE; Hiroshi MAEKAWA
Oral presentation, Japanese, 29th CFD Symposium, Japan Society of Fluid Mechanics, Chikushi campus, Kyushu University, Domestic conference
16 Dec. 2015

A study of subcritical and supercritical transitional structures of a boundary layer tripped by finite height obstacles periodically arrayed in span
Sae TAKAHASHI; Ikumi JIMBO; Yohei INOUE; Hiroshi MAEKAWA
Oral presentation, Japanese, JSFM Annual Meeting 2015, Japan Society of Fluid Mechanics, Ohokayama campus, Tokyo Institute of Technology, Domestic conference
28 Sep. 2015

Turbulent boundary structure behind a functional riblet with charactalistic scales
Yuko TORIUMI; Yohei INOUE; Hiroshi MAEKAWA
Oral presentation, Japanese, JSME Annual Meeting 2015, Japanese Society of Mechanical Engineers, Hokkaido University, Domestic conference
14 Sep. 2015

Study of the interaction between a wake rectangular plate and cavity in boundary layer flow
Yohei INOUE; Masahiro SUZUKI; Hiroshi MAEKAWA; Hajime TAKAMI(RTRI
Oral presentation, Japanese, The 57th workshop on "investigation and Control of Transition to Turbulence", 乱流遷移の解明と制御研究会, Wakazato campus, Shinshu University, Domestic conference
08 Sep. 2015

Study on the flow around a flat plate associated with the cavity flow in the boundary layer
Masahiro SUZUKI; Yohei INOUE; Hiroshi MAEKAWA; Hajime TAKAMI
Oral presentation, Japanese, 2014 Symposium on Environmental Engineering, Japanese Society of Mechanical Engineers, Tsukuba international convention center, Domestic conference
18 Nov. 2014

Flow around a plate behind a cavity in a boundary layer
Masahiro SUZUKI; Yohei INOUE; Hiroshi MAEKAWA; Hajime TAKAMI
Oral presentation, Japanese, JSFM Annual Meeting 2014, Japan Society of Fluid Mechanics, Tohoku University, Domestic conference
16 Sep. 2014

Interaction between jet and vortices in the flow past a bluff body
Yohei INOUE; Takumi HIRATA; Masahiro SUZUKI; Hiroshi MAEKAWA
Oral presentation, Japanese, JSME Annual Meeting 2014, Japanese Society of Mechanical Engineers, Tokyo Denki University, Domestic conference
07 Sep. 2014

Numerical investigation of the interaction between turbulent flow and solid structures near a cavity
井上洋平; 前川博
Oral presentation, Japanese, The 54th workshop on "investigation and Control of Transition to Turbulence", 乱流遷移の解明と制御研究会, 室蘭工業大学, Domestic conference
15 Mar. 2014

Numerical investigation of the interaction between rectangular flaps and near wall vortices
Yohei INOUE; Sho FUJITA; Hiroshi MAEKAWA
Oral presentation, Japanese, 27th CFD Symposium, Japan Society of Fluid Mechanics, Nagoya University, Domestic conference
17 Dec. 2013

Investigations of the flow around rectangular wings placed near the cavity
Yohei INOUE; Sho FUJITA; Masahiro SUZUKI; Hiroshi MAEKAWA
Oral presentation, Japanese, Annual meeting of JSME-FED 2013, Fluid Engineering Division, Japan Society of Mechanical Engineering (JSME-FED), Ito Campus, Kyushu University, Domestic conference
10 Nov. 2013

Seminar A
The University of Electro-Communications

輪講A
電気通信大学

Mechanical Engineering and Intelligent Systems Laboratory,Advanced II
The University of Electro-Communications

知能機械工学基礎実験第二
電気通信大学

Fluid Mechanics, Theory and Practice
The University of Electro-Communications

流体力学および演習（II類，III類）
電気通信大学

Fundamentals of Fluid Engineering
The University of Electro-Communications

流体工学基礎
電気通信大学

知能機械工学基礎実験第一
電気通信大学

Physics Laboratory
The University of Electro-Communications

基礎科学実験A
電気通信大学

Advanced Experiments B
The University of Electro-Communications

専門実験Ｂ（ＥＭＣ）
電気通信大学

Mechanical Engineering and Intelligent Systems Laboratory,Advanced ⅠI
The University of Electro-Communications

知能機械工学基礎実験 II
電気通信大学

Mechanical Engineering and Intelligent Systems Laboratory,Advanced I
The University of Electro-Communications

知能機械工学基礎実験 I
電気通信大学

Japan Society of Mechanical Engineering

Japan Society of Fluid Mechanics

Japanese Society for Multiphase Flow

American Physical Society

American Institute of Aeronautics and Astronautics

低GWP冷媒を採用した次世代冷凍空調技術の実用化評価に関する研究開発
齊藤 潔; 学内代表
国立研究開発法人 新エネルギー・産業技術総合開発機構(NEDO), 研究委託（再委託）
29 Jun. 2018 - 31 Mar. 2023

Analysis of origin of Attached-Eddy in a boundary layer using significant slow transition
Hiroshi Maekawa
01 Apr. 2017 - 31 Mar. 2020

Development of drag reduction devices for a bluff body.
Yohei INOUE
JKA, Fellowship grant, Principal investigator
01 Apr. 2017 - 31 Mar. 2018

UEC Research Support Program (International Conference
2017 - 2017

電気通信大学 研究活性化システム 若手研究支援（800千円）
2016 - 2016