Faculty Profiles - FUCHIWAKI Masaki

Papers - FUCHIWAKI Masaki

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Mechanical Alloying Process Design by Using DEM Simulation and Experimental Validation Reviewed International journal

Boonthai Torsak, Nunthavarawong Peerawatt, Kowitwarangkul Pruet, Fuchiwaki Masaki

1st International Conference on Robotics, Engineering, Science, and Technology, RESTCON 2024Pattaya16 2024.02

Aerodynamic performances and efficiency of axial flow fan placed in cooling system Reviewed International journal

Kawano T., Fuchiwaki M.

Journal of Physics: Conference Series 2217 ( 1 ) 2022.05

Flow Patterns and Hysteresis Characteristic of a Poppet Valve Reviewed International journal

HIROSE Naoki, MASUDA Seiei, SHIMIZU Fumio, FUCHIWAKI Masaki, TANAKA Kazuhiro

JFPS International Journal of Fluid Power System ( The Japan Fluid Power System Society ) 15 ( 2 ) 53 - 61 2022.01

Language：English Publishing type：Research paper (international conference proceedings)

Previous studies on poppet valves have revealed that there are various flow patterns in the flow field around the valve body and that the flow pattern inside the poppet valve has various effects on the poppet valve. Recently, Masuda et al. have reproduced the hysteresis phenomenon on the pressure and flowrate characteristics of a poppet valve by CFD analysis coupled with an equation of motion. Unfortunately, their paper does not describe the detailed relationship between the hysteresis characteristics and the flow pattern. In this study, by succeeding and developing the work of Masuda et al. and including the results of previous studies, we have systematically organized the flow patterns of poppet valves into five types and clarified the relationship between the hysteresis characteristics and flow patterns. In addition, the flow force acting on the poppet valve connecting the hysteresis characteristic and the flow pattern has also been clarified.

DOI： 10.5739/jfpsij.15.53

CiNii Research

Growth Mechanism of a Vortex Structure Formed by a Sweeping Jet and a Main Flow Reviewed International journal

Kobayashi E., Fuchiwaki M., Raghu S.

American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM 2 2022.01

Pressure drop mechanisms in a cooling system enclosure Reviewed International journal

KAWANO Takashi, FUCHIWAKI Masaki

Journal of Fluid Science and Technology ( The Japan Society of Mechanical Engineers ) 17 ( 4 ) JFST0014 - JFST0014 2022.01

Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal)

A potential way to reduce the noise generated by construction machinery cooling systems is to satisfy the flow rate required for cooling at lower fan speeds, and a promising approach to achieving this goal involves finding ways to reduce the pressure drop that occurs in the cooling system ventilation passages. Towards that end, approaches using computational fluid dynamics (CFD) have proven effective for estimating three-dimensional (3D) spatial pressure drops, but there have been few reports on actual loss mechanisms. In this study, the mechanisms of pressure drops that occur inside a cooling system enclosure and around exhaust port vents were investigated by capturing the flow discharged by the axial fan within the enclosure into the atmosphere via the exhaust port. We found that portions of the fan outlet flow divert significantly inside the enclosure and are exhausted at exhaust port outlets located some distance away from the fan. We also found that the pressure drops in such locations are larger than experienced by flow discharged via the shortest path. Since flows within the enclosure collide with each other and become unsettled around the exhaust port, turbulent kinetic energy increases, thus intensifying the pressure drop. Hence, by expelling the flow at the exhaust port via the shortest path without allowing it to mix chaotically inside the enclosure, the flow rate can be increased using the same fan speed.

DOI： 10.1299/JFST.2022JFST0014

Scopus

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VORTEX STRUCTURE GENERATED BY A SWEEPING JET IN A CROSS FLOW AND ITS CREATION PROCESS Reviewed International journal

Fuchiwaki M., Raghu S.

American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM 1 2022.01

Three-dimensional Vortex Structure Formed by an Interaction Between a Main Flow and a Sweeping Jet

TANAKA Shoma, FUCHIWAKI Masaki

The Proceedings of the Fluids engineering conference ( The Japan Society of Mechanical Engineers ) 2022 ( 0 ) OS03-31 2022.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

A jet in crossflow formed by the interaction between the jet and a main flow is a typical unsteady flow. Jet in crossflow have been studied using experimental and numerical approaches. In particular, a sweeping jet in crossflow has recently attracted attention from the viewpoint of active flow separation control. A sweeping jet, which is an oscillating jet with high frequency and large amplitude, energy can be injected widely into the flow separation area. However, the flow fields formed by the interaction between the sweeping jet and the main flow and their flow mechanisms are poorly understood, it has not been put to practical use. Furthermore, the flow structure produced by the interaction between a sweeping jet and a main flow with different behaviors is very complex and difficult to understand. Therefore, it is extremely important to elucidate the flow structure generated by the interaction between a sweeping jet and a main flow. In this study, the detailed vortex structure generated by the interaction between the sweeping jet and the main flow was quantitatively examined using stereo PIV. The vortex structure behaves differently depending on the velocity ratio. The larger velocity ratio, a sweeping jet extends to the wake and develops near the wall.

DOI： 10.1299/jsmefed.2022.os03-31

CiNii Research

Three-dimensional Vortex Structure Formed by a Sweeping jet and Main flow

TANAKA Shoma, Fuchiwaki Masaki

The Proceedings of Mechanical Engineering Congress, Japan ( The Japan Society of Mechanical Engineers ) 2022 ( 0 ) S055p-10 2022.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

A sweeping jet produced by a fluidic oscillator has recently been examined from the viewpoint of flow separation control. A sweeping jet, which is an oscillating jet with high frequency and large amplitude, is generated by the internal structure of the oscillator, which eliminates the need for a drive unit. Sweeping jets have attracted attention as an active flow control device. Studies have proposed active flow control techniques for an airfoil based on sweeping jets. Most of these studies focused on the characteristics of the dynamic forces acting on the airfoil. However, the flow fields formed by the interaction between the sweeping jet and the main flow and their flow mechanisms are poorly understood, especially for the case where a sweeping jet is ejected into a main flow when a flow field is used to control flow separation. In this study, the detailed vortex structure generated by the interaction between the sweeping jet and the main flow was quantitatively examined using stereo PIV. The stream tube generated by the interaction between the sweeping jet and the main flow consists of two vortex tubes near the outlet of the sweeping jet at a location of 2.0d to 6.0d. At the wake over 10.0d, a pair of vortex tubes gradually separates.

DOI： 10.1299/jsmemecj.2022.s055p-10

CiNii Research

Vortex structure and growth process formed by a sweeping jet and a main flow International journal

Kobayashi Eisei, Fuchiwaki Masaki

The Proceedings of Mechanical Engineering Congress, Japan ( The Japan Society of Mechanical Engineers ) 2022 ( 0 ) S055-13 2022.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

Sweeping jet is a jet that oscillates at high velocity and is known to have a higher mixing effect. Therefore, it is attracting attention especially from the viewpoint of flow control. In fact, although reports have been made that contribute to control, the flow characteristics that directly contribute to control have not been clarified, and optimization and practical application have not progressed. Moreover, it has been shown that the flow splits in the wake and that a vortex structure similar to a single Jet in cross flow is emitted to the left and right near the exit of the sweeping jet, but the formation and decay processes that link them have not yet been clarified. In this study, we focus on the temporal changes of the flow structure generated near the exit of the inclined sweeping jet and elucidate them. In addition, numerical simulations are used to capture changes in spatial and temporal phenomena in detail.

DOI： 10.1299/jsmemecj.2022.s055-13

CiNii Research

Pressure Drop Caused by Diverting Flow in Cooling System and Its Optimization

KAWANO Takashi, FUCHIWAKI Masaki

The Proceedings of Mechanical Engineering Congress, Japan ( The Japan Society of Mechanical Engineers ) 2022 ( 0 ) S053-08 2022.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

One solution to reduce the cooling system noise generated by construction machinery is to drive the fan at low speed while ensuring the flow rate required for the cooling system. An approach to achieve this is to reduce the pressure drop that occurs in the flow path in the cooling system. Using CFD is effective for estimating the three-dimensional spatial pressure drop characteristics of the system, but the mechanism of pressure drop that occurs in the three-dimensional flow field has not been clarified. In this study, the flow field around the axial flow fan placed in the cooling system enclosure is visualized, and the mechanism of pressure drop that occurs in the three-dimensional flow field considering the actual configuration is clarified. With the default exhaust port, we found that portions of the fan outlet flow divert significantly inside the enclosure and are exhausted at exhaust port outlets located some distance away from the fan. With the optimized exhaust port, there are few diverting flow and the flow in the enclosure is discharged in a shorter route than the default exhaust port, so the pressure drop is reduced and the flow rate is increased. Hence, by expelling the flow at the exhaust port via the shortest path without allowing it to mix chaotically inside the enclosure, the flow rate can be increased using the same fan speed.

DOI： 10.1299/jsmemecj.2022.s053-08

CiNii Research

Pressure Fluctuation on the Blade of a Axial Fan Driven in a Cooling System Enclosure

KAWANO Takashi, FUCHIWAKI Masaki

The Proceedings of the Fluids engineering conference ( The Japan Society of Mechanical Engineers ) 2022 ( 0 ) OS07-15 2022.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

W Suppressing the pressure fluctuations distributed on the blade surface of an axial fan is applied as one of the means to reduce the noise generated in the cooling system of construction machinery. For that purpose, it is effective to use computational fluid dynamics (CFD) to capture the 3D vortex structure around a fan blade. However, while there have been many reports on the flow field formed around the blades of a fan alone or an axial fan with a duct-shaped shroud, the influence of the vortex structure formed at the actual operating point of the axial fan on the pressure fluctuation on the blade surface has not been sufficiently discussed. In this study, the three-dimensional vortex structure around the fan blade installed in the cooling system is investigated, and in particular, the influence of the wing tip leakage vortex on the pressure fluctuation on the fan blade surface is clarified. Wing tip leakage vortex that flow from forward in the direction of rotation of the fan interfere with a blade while oscillating periodically in the y-axis direction. The oscillation of the forward wing tip leakage vortex causes the separation position of the newly formed wing tip leakage vortex to change, and as a result, the pressure fluctuation increases at the tip of the blade suction surface near the separation position.

DOI： 10.1299/jsmefed.2022.os07-15

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Growth Process of Vortex Structure Formed by a Sweeping jet in Cross Flow near a Wall

KOBAYASHI Eisei, FUCHIWAKI Masaki

The Proceedings of the Fluids engineering conference ( The Japan Society of Mechanical Engineers ) 2022 ( 0 ) OS03-30 2022.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (bulletin of university, research institution)

The Fluidic Oscillator can permanently generate a high-velocity oscillating jet (Sweeping jet) and give a large fluctuation to the flow field without driving parts. Therefore, it is attracting attention as a new active flow control device. However, the flow characteristics that directly contribute to flow separation control have not been sufficiently clarified, and their optimization and practical application have not progressed. Therefore, in order to clarify the details of the flow characteristics that contribute to the flow separation control, it is necessary to clarify the flow structure generated by the sweeping jet that blows into the main flow from the wall surface．In this study, we clarify the growth process of the vortex structure generated by the interaction of the sweeping jet, which blows out from the wall at 30 degrees to the main flow, by numerical simulation. It is conducted to understand the complex and large-scale flow structure and its generation process generated by a sweeping jet in the main flow. The vortex structure forms one flow tube at z/d < 4.5 and splits into two at z/d > 4.5. Shear layer vortices with the same frequency as the oscillation frequency are generated in the stream tube, and after splitting into two, it is generated alternately to the left and right. After that, at z/d > 6.0, the shear layer vortex begins to collapse due to wall interference, and at z/d > 7.5 it transforms into discrete vortices.

DOI： 10.1299/jsmefed.2022.os03-30

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Vortex Ring Formed by a Butterfly Wing and Dynamic Forces

HAISHI Sei, FUCHIWAKI Masaki

The Proceedings of the Fluids engineering conference ( The Japan Society of Mechanical Engineers ) 2022 ( 0 ) OS03-27 2022.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

Butterfly generates unsteady dynamic fluid force with a pair of vortex rings. In order to elucidate the flight mechanism of butterflies, it is necessary not only to clarify the vortex rings formed around the wings but also elucidate the characteristics of the unsteady fluid force generated by the flapping motion. By applying the momentum theory to the vortex rings formed during flapping motion, it is possible to estimate the force generated by flapping motion. In this study, we reconstruct a pair of vortex rings formed by flapping motion based on a small number of visualization results and elucidate dynamic fluid force characteristics. A part of estimation result of Lift estimated by the rough shape vortex rings generated by downstroke and upstroke do not match with the direct measurement result. But not only the peak value of estimation result of Lift is near with the direct measurement result quantitatively but also the value of estimation result between upstroke is a small negative as well as the direct measurement result. Although there is a phase difference between the estimation result and direct measurement result, there is a qualitative and quantitative agreement between estimation results and direct measurement result. From those results, butterfly generate the unsteady dynamic Lift between downstroke, especially at butterfly spread wing maximum (t/T = 0.40). After that, the unsteady dynamic Lift decrease and become 0 at upstroke.

DOI： 10.1299/jsmefed.2022.os03-27

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Vortical Flow around Blades of an Axial Flow Cooling Fan in Construction Machinery

KAWANO Takashi, FUCHIWAKI Masaki

The Proceedings of the Fluids engineering conference ( The Japan Society of Mechanical Engineers ) 2021 ( 0 ) OS07-16 2021.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

The energy loss of the airflow generated by forced convection in the cooling system included in heavy construction machinery is due to friction and turbulence in its ventilation path, and its behavior is three-dimensional. Therefore, computational fluid dynamics (CFD) is effective in clarifying the three-dimensional energy loss mechanism, but there are few reports that three-dimensionally capture the flow field in the cooling system of construction machinery, especially including some components around the axial fan. In this study, the flow field of the entire cooling system was visualized by numerical simulation using ANSYS-CFX17.0, and the effect of the three-dimensional flow field formed around the blades of the axial flow fan on the fan performance was investigated. From the results of CFD analysis, the fan performance is inferior in the case of the axial fan only than in the case of the entire cooling system, which is consistent with the blockage effect of the wing tip leakage vortex limiting the air flowing into the impeller. The wing tip leakage vortex is large-scale and has a high vorticity, and is divided into leading edge of adjacent blade because it flows in the tangential direction while maintaining the same height as the wing tip.

DOI： 10.1299/jsmefed.2021.os07-16

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Pressure Drop Distribution in Three-Dimensional Flow Field Generated inside Cooling System Enclosure

KAWANO Takashi, FUCHIWAKI Masaki

The Proceedings of Mechanical Engineering Congress, Japan ( The Japan Society of Mechanical Engineers ) 2021 ( 0 ) S055-16 2021.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

A potential way to reduce cooling system noises generated by heavy construction machinery is to generate the required cooling airflow with a low fan speed, and one way to accomplish this is to optimize the ventilation path through which the airflow generated by the cooling fan passes. The computational fluid dynamics (CFD) approach would be effective for modeling the three-dimensional pressure drop characteristic of such systems. However there have been few reports aimed at clarifying the loss generation mechanisms or suggesting minimization methods based on flow field viewpoints. Accordingly, in this study, we visualize the three-dimensional (3D) flow field characteristics of an electric cooling fan system installed within the cooling enclosure of a heavy construction machinery and investigate the details of the system’s pressure drop mechanisms. The total pressure drop that occurs in the exhaust side enclosure accounts for 26% of the total pressure drop that occurs in the entire enclosure. In the exhaust side enclosure, the pressure drop is increased because the shape of the exhaust port is not corresponded to annular flow of the cooling fan wake.

DOI： 10.1299/jsmemecj.2021.s055-16

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Three-dimensional vorticial structure and generation process formed by the Sweeping jet in Cross flow

KOBAYASHI Eisei, FUCHIWAKI Masaki

The Proceedings of the Fluids engineering conference ( The Japan Society of Mechanical Engineers ) 2021 ( 0 ) OS03-01 2021.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

The sweeping jet has been attracted attention as active flow control and mixing acceleration devices. Especially, the studies of the flow separation control techniques using the sweeping jet have been reported recently. However, most of these results are mainly contribution of the dynamic forces and the study on the flow mechanism produced by a sweeping jet has not been understood sufficiently. Especially, the vortex structure and flow mechanism formed by the interaction between the sweeping jet and the main flow have not been understood sufficiently. The purpose of the present study is to investigate the detailed vortex structure produced by the interaction between the sweeping jet from the Fluidic Oscillator and the main flow by a numerical simulation.

DOI： 10.1299/jsmefed.2021.os03-01

CiNii Research

Internal Flow and Hysteresis Characteristic of the Poppet Type Pressure Control Valve

MASUDA Seiei, SHIMIZU Fumio, FUCHIWAKI Masaki, TANAKA Kazuhiro

TRANSACTIONS OF THE JAPAN FLUID POWER SYSTEM SOCIETY ( The Japan Fluid Power System Society ) 52 ( 1 ) 8 - 15 2021.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

Poppet valves are often used as a pressure / flow rate control valve for a hydraulic system. Much research has been conducted on the characteristics of poppet valves. Hysteresis characteristics have emerged in pressure-flow characteristic experiments of poppet valves designed and prototyped by the author. In order to clarify the mechanism of this hysteresis characteristic, we firconfirmed the reproduction of hysteresis and confirmed the validity of the research policy. Specifically, we investigated the internal flow by CFD analysis and examined the reproduction of hysteresis characteristics by CFD. The CFD software used is Simerics MP +, which allows CFD analysis to be combined with the valve's equation of motion. First, the precision of CFD analysis was verified by confirming that the experimental values of in the reference and calculated values were in good agreement. Furthermore, CFD steady flow analysis of the internal flow was performed, and the validity of the calculation results such as the flow patterns, flow coefficient, and flow force was examined. As a result, it was clarified that there is a flow pattern that can be roughly divided into two types of internal flow with different flow rates. Then, by changing the flow rate in a time-dependent manner using CFD, we were able to reproduce the hysteresis characteristics that are in good agreement with the experimental results.

DOI： 10.5739/jfps.52.8

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Other Link： https://www.jstage.jst.go.jp/article/jfps/52/1/52_8/_pdf

Vortex structure near the wall surface formed by Sweeping jet

KOBAYASHI Eisei, FUCHIWAKI Masaki

The Proceedings of Mechanical Engineering Congress, Japan ( The Japan Society of Mechanical Engineers ) 2021 ( 0 ) S051-25 2021.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

The Sweeping jet from the Fluidic Oscillator has been attracted attention as an active flow control device. The studies of the flow separation control techniques using the Fluidic Oscillator have been reported. However, most of these results area mainly contribution of the dynamic forces and the study of the flow mechanism produced by a Sweeping jet has not been understood sufficiently. Especially, it is not known the interaction between the Sweeping jet from the Fluidic Oscillator and the main flow and the detailed flow structure due to the interaction. The purpose of the present study is to investigate the detailed vortex structure produced by the interaction between the Sweeping jet from the Fluidic Oscillator and the main flow by a numerical simulation using ANSYS CFX.

DOI： 10.1299/jsmemecj.2021.s051-25

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Vorticity growth formed in vicinity of a wall on a moving elastic airfoil Reviewed International journal

Fuchiwaki M.

American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM 3 2021.01

Study on material removal mechanism for Cu-CMP on a patterned silicon wafer Reviewed International journal

Bakier M.A.Y.A., Matsumoto R., Fuchiwaki M., Khajornrungruang P., Suzuki K.

10th International Conference on Leading Edge Manufacturing Technologies in 21st Century, LEM 2021 243 - 245 2021.01

Pressure drop mechanisms generated in a cooling system enclosure of construction machinery Reviewed International journal

Kawano T., Fuchiwaki M.

American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM 2 2021.01

Modelling and reducing fuel flow pulsation of a fuel-metering system by improving response of the pressure control valve during pump mode switching in a turbofan engine Reviewed

Masuda S., Shimizu F., Fuchiwaki M., Tanaka K.

ASME/BATH 2019 Symposium on Fluid Power and Motion Control, FPMC 2019 2020.01

Vorticity Growth Formed by an Elastic Deformation of Moving Airfoil

TONE Chigusa, FUCHIWAKI Masaki

The Proceedings of the Fluids engineering conference ( The Japan Society of Mechanical Engineers ) 2020 ( 0 ) OS03-07 2020.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

In recent years, there has been increasing interest in the flow field around elastic airfoils that perform unsteady motion, and many studies have been conducted using experimental and numerical approaches. There are many reports on the relationship between the wake structure of the unsteady airfoils and the dynamic fluid force acting on them. On the other hand, the dynamic behaviors of micro vortex structure and the growth process of the vortex structure have not been clarified sufficiently. The purpose of our present study is to clarify the growth process of the vortex structure in the vicinity of the wall. Especially, the authors focus on the movement of the wall and defined the as the temporal change in the spatial gradient in order to evaluate the elastic deformation quantitatively. The authors perform the numerical simulation of the flow field around a heaving elastic airfoil by using ANSYS CFX 17.0 and investigate the dynamic behaviors of the vorticity in vicinity of the wall.

DOI： 10.1299/jsmefed.2020.os03-07

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Other Link： https://www.jstage.jst.go.jp/article/jsmefed/2020/0/2020_OS03-07/_pdf

Soft Actuator based on Bimorph Conducting Polymer with Differnet Thickness ratio

HAYASHI Mizuki, HUH Jong-Hoon, FUCHIWAKI Masaki

The Proceedings of Mechanical Engineering Congress, Japan ( The Japan Society of Mechanical Engineers ) 2020 ( 0 ) J11119 2020.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

Soft actuators, or artificial muscles, based on conducting polymers, constitute the base for the development of promising polymeric sensing motors, tools for surgeons, or zoomorphic and anthropomorphic soft robots. Some electrochemical characterizations of these soft actuators of artificial muscles have been already reported. In this study, the behaviors of the asymmetric bilayer artificial muscles, PPy-ClO4/PPy-DBS worked in 0.5 M NaClO4 aqueous solutions were discussed by the dynamo-voltammetric responses and coulo-dynamic Evolution responses. Especially, the authors are focusing on the thickness ratio between the PPy-ClO4 and the PPy-DBS layers in this study. In this study, the author investigates the dynamic behavior of the bending actuation of the asymmetric bilayer artificial muscles based on some kinds of the thickness ratio between the anion-driven and the cation-driven layers.

DOI： 10.1299/jsmemecj.2020.j11119

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Vorticity Growth Formed by a Translation of wall on a Moving Elastic Airfoil

TONE Chigusa, FUCHIWAKI Masaki

The Proceedings of Mechanical Engineering Congress, Japan ( The Japan Society of Mechanical Engineers ) 2020 ( 0 ) S05121 2020.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

Flow field around moving airfoils capable of flexible elastic deformation has become a focus of attention in recent years. These flow fields may be understood as a fluid-structure interaction (FSI) problem, and the motion and deformation of elastic airfoils, as well as the associated vortex flow phenomena in their vicinity, are complicated. Many studies on the flow field and the characteristics of dynamic forces acting on them around the elastic moving body have also carried out by the experimental and numerical approaches. The macro scale vortex structure and the characteristics of dynamic forces acting on the elastic moving airfoil have been understood. However, the details of the vortex structure and the growth process of the vorticity in a vicinity of the wall of an elastic airfoil has not been clarified sufficiently. In this study, the authors investigate the growth process of the vorticity in a vicinity of the wall of an elastic airfoil by FSI simulation using ANSYS 17.0/ANSYS CFX 17.0. In order to clarify the parameters which contributes to the growth process of the vorticity, the flow fields in the vicinity of the wall of the elastic and the rigid airfoils are visualized.

DOI： 10.1299/jsmemecj.2020.s05121

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Other Link： https://www.jstage.jst.go.jp/article/jsmemecj/2020/0/2020_S05121/_pdf

Flow Structure formed by a Sweeping jet into Cross Flow

KOBAYASHI Eisei, FUCHIWAKI Masaki

The Proceedings of Mechanical Engineering Congress, Japan ( The Japan Society of Mechanical Engineers ) 2020 ( 0 ) S05106 2020.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

A fluidic oscillator generates a sweeping jet with high frequency and large amplitude and is characterized by its capability for jet ejection over a wide range and for fluid oscillation by an internal structure that eliminates the need for a drive unit. Recently, the sweeping jet from the fluidic oscillator has attracted attention as an active flow control device. Many studies on flow control techniques using the sweeping jet have been reported. However, the details of the flow structure produced by the interaction between the sweeping jet and the main flow are not yet understood sufficiently. In particular, the vortex structure or the flow mechanism produced by the interaction between the sweeping jet has not been clarified. The purpose of the present study is to clarify the macro-scale vortex structure produced by the interaction between the sweeping jet from the fluidic oscillator and the main flow. The detailed vortex structure produced by these interactions is visualized quantitatively by a numerical simulation.

DOI： 10.1299/jsmemecj.2020.s05106

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Vortex Flow Structure Generated by Sweeping Jet in Cross Flow

KOBAYASHI Eisei, FUCHIWAKI Masaki

The Proceedings of the Fluids engineering conference ( The Japan Society of Mechanical Engineers ) 2020 ( 0 ) OS03-21 2020.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

A jet in cross flow is one of typical phenomena in fluid engineering and many studies about this flow field have been already reported. On the other hand, a sweeping jet produced by a fluidic oscillator has a high frequency and a large amplitude and is attracted attention from the viewpoint of an active flow control in recent years. However, the studies on sweeping jet in cross flow have not been understood sufficiently and the detailed flow structures and vortex structures have not clarified. The purpose of the present study is to clarify the detailed flow structures in the sweeping jet in cross flow by using a numerical simulation. Especially, the authors focus on the flow structures and its dynamic behaviors formed by an interaction between the sweeping jet and main flow near the outlet of the sweeping jet.

DOI： 10.1299/jsmefed.2020.os03-21

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Vorticity Growth Process on a Wall of an Elastic Moving Airfoil Reviewed International journal

2019.09

Optimization of Thickness Ratio of Asymmetric Bilayer Artificial Muscle Reviewed

2019.08

Flow Structure Generated by a Sweeping Jet in a Cross Flow Reviewed

2019.05

Modelling and reducing fuel flow pulsation of a fuel-metering system during pump mode switching in a turbofan engine Reviewed

Masuda S., Shimizu F., Fuchiwaki M., Tanaka K.

IOP Conference Series: Earth and Environmental Science 240 ( 5 ) 2019.03

Vorticity Formed by an Elastic Deformation of a Moving airfoil and its Growth

TONE Chigusa, FUCHIWAKI Masaki

The Proceedings of Mechanical Engineering Congress, Japan ( The Japan Society of Mechanical Engineers ) 2019 ( 0 ) S05123P 2019.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

Previous studies have shown that the elastic airfoil with heaving motion generates a strong vorticity on the airfoil wall and emits a strong vorticity in the wake compared to the rigid airfoil. However, how spatial gradient and vorticity development are related has not been elucidated. This research investigates the relationship between the time change of the spatial gradient of the airfoil wall and the vorticity created on the moving airfoil wall. Specifically, using NACA0010 with heaving motion with the strength of heaving motion St = 0.3, the heaving amplitude A = c/5, the attack angle α is 16 °, Re based on chord length is Re = 4,000. The airfoil has a non-dimensional distance from the leading edge x/c = 0 to 0.25 as a rigid part and x/c = 0.25 to 1.0 as an elastic part, and numerical analysis by fluid-structure interaction analysis using ANSYS 17.0 / ANSYS-CFX 17.0. For the turbulence model, we use k-ω of RANS, which has a relatively small computational load. The fact that the non-dimensional vorticity vicinity the trailing edge of the airfoil is developing when the downward deformation is small and only near the trailing edge, not when the airfoil wall is largely deformed downward.

DOI： 10.1299/jsmemecj.2019.s05123p

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Other Link： https://www.jstage.jst.go.jp/article/jsmemecj/2019/0/2019_S05123P/_pdf

Growth Process of Vorticity Formed on a Moving Elastic Airfoil

TONE Chigusa, FUCHIWAKI Masaki

The Proceedings of the Fluids engineering conference ( The Japan Society of Mechanical Engineers ) 2019 ( 0 ) OS3-45 2019.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

The flow field around moving airfoil capable of flexible elastic deformation has become a focus of attention in recent years. These flow fields may be understood as a fluid-structure interaction (FSI) problem, and the motion and deformation of elastic airfoils, as well as the associated vortex flow phenomena in their vicinity, are complicated. Many studies on the flow filed around the elastic moving body have also carried out. The macro scale vortex structure and the dynamic forces acting on the elastic moving airfoil have been understood. However, the growth process of the vorticity in a vicinity of the wall of an elastic airfoil has not been clarified sufficiently. In this study, the authors investigate the growth process of the vorticity in a vicinity of the wall of an elastic airfoil by FSI simulation using ANSYS 17.0 / ANSYS CFX 17.0. Especially, the authors focus on the relationship between the spatial gradient of the wall of the elastic airfoils and the growth process of the vorticity in a vicinity of the wall.

DOI： 10.1299/jsmefed.2019.os3-45

CiNii Article

CiNii Research

Other Link： https://www.jstage.jst.go.jp/article/jsmefed/2019/0/2019_OS3-45/_pdf

Vortex Structure Formed by a Sweeping Jet in Cross Flow

HIRAO Takuya, FUCHIWAKI Masaki

The Proceedings of Mechanical Engineering Congress, Japan ( The Japan Society of Mechanical Engineers ) 2019 ( 0 ) S05122P 2019.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

The fluidic oscillator generates a sweeping jet with a high frequency and a large amplitude and is characterized by its capability for jet ejection over a wide range and for fluid oscillation by an internal structure. The sweeping jet from a fluidic oscillator has attracted attention as an active flow control device. Many studies on flow control techniques using a sweeping jet have been conducted. However, these studies focused on the characteristics of the dynamic forces acting on an airfoil in conjunction with a fluidic oscillator. The purpose of the present study is to investigate the detailed vortex structure generated by the interaction between the sweeping jet from the fluidic oscillator and the main flow. The detailed vortex structure produced by these interactions is visualized quantitatively by a stereo PIV measurement. The detailed vortex structure and the flow mechanism generated by these interactions are investigated.

DOI： 10.1299/jsmemecj.2019.s05122p

CiNii Article

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Other Link： https://www.jstage.jst.go.jp/article/jsmemecj/2019/0/2019_S05122P/_pdf

Flow Structure Formed by an Interaction between a Sweepimg Jet and a Cross Flow

HIRAO Takuya, FUCHIWAKI Masaki

The Proceedings of the Fluids engineering conference ( The Japan Society of Mechanical Engineers ) 2019 ( 0 ) OS3-46 2019.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

The sweeping jet from a fluidic oscillator has attracted attention as an active flow control device. Many studies on flow control techniques using a sweeping jet have been conducted. However, interaction between the sweeping jet and the main flow is expected to occur, and a complex vortex structure will be generated. The authors have reported the flow characteristics generated by interactions between the sweeping jet from the fluidic oscillator and the main flow based on stereo particle image velocimetry (PIV) measurement. Finally, the sweeping jet from the fluidic oscillator spreads out over a wider range due to its interaction with the main flow. At the high-velocity rate, Vj/V0, the high-velocity jets at the center of the sweeping jet are surrounded by low-velocity jets with a strong rotational component at the outside. The purpose of the present study is to clarify the development process of the detailed vortex structure generated by the interaction between the sweeping jet from the fluidic oscillator and the main flow.

DOI： 10.1299/jsmefed.2019.os3-46

CiNii Article

CiNii Research

Other Link： https://www.jstage.jst.go.jp/article/jsmefed/2019/0/2019_OS3-46/_pdf

Growth of Vortcity in a Vicinity of Wall of an Elastic Moving Airfoil Reviewed

2018.12

Breakup of Bubble Cloud Ejected into a Main Flow Reviewed

2018.10

Flow structure formed by a sweeping jet ejected into a main flow Reviewed

2018.07

Dynamic Behavior of Leading Edge vortex and Vorticity on Suction Surface of a Heaving Elastic Airfoil Reviewed

2018.06

Flow structure formed by a sweeping jet ejected into a main flow Reviewed

Fuchiwaki M., Raghu S.

American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM 1 2018.01

Characteristics of Dynamic Forces generated by a Butterfly wing

KONDO Susumu, FUCHIWAKI Masaki

The Proceedings of Mechanical Engineering Congress, Japan ( The Japan Society of Mechanical Engineers ) 2018 ( 0 ) J0210203 2018.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

A typical example of the flow field around a moving elastic body is that around butterfly wings, which contain many veins and can undergo elastic deformation. In recent years, quantitative flow visualization techniques, such as Particle Image Velocimetry (PIV) measurement, have advanced rapidly, and the flow fields around insect wings have been actively investigated using such techniques. The characteristics of the dynamic forces generated by the flapping insect wing have attracted a great deal of attention. However, the characteristics of dynamic forces generated by the flapping insect wing are not yet sufficiently understood. The purpose of the present study is to investigate the characteristics of dynamic lift generated by the flapping butterfly wing. We measured the dynamic lift produced by a flapping butterfly, using a six-axes sensor. The sixaxes sensor was synchronized with a high speed camera to capture the flapping motion of the wing, and the dynamic lift was related to the flapping motion of the butterfly wing.

DOI： 10.1299/jsmemecj.2018.j0210203

CiNii Article

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Other Link： https://www.jstage.jst.go.jp/article/jsmemecj/2018/0/2018_J0210203/_pdf

Growth of Vorticity on a Wall of a Elastic Moving Airfoil

SHIGENOBU Itsuki, FUCHIWAKI Masaki

The Proceedings of Mechanical Engineering Congress, Japan ( The Japan Society of Mechanical Engineers ) 2018 ( 0 ) S0510102 2018.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

The flow field around a moving airfoil is one of the typical unsteady flow and many studies on the flow field around the moving airfoil have been carried out with experimental and numerical approaches. Especially, not only the dynamic behavior of the leading edge vortex and wake structure of moving airfoils, but also their dynamic lift and thrust characteristics have been already reported. In recent years, the flow field around an elastic moving body has been attracted attention. The flow field around the elastic body is treated as a coupled problem between the fluid and structure (fluid structure interaction, FSI), and a series of phenomena, motions, structural deformations and the generation/growth/development of vortices are reported continuously. Many studies on the flow field around the elastic moving body have also carried out. However, the impact of elastic deformation effects on the vortices generated in the vicinity of the wall and the dynamic behaviors of the micro scale vortices have not been clarified sufficiently. The objective of this study is to investigate the dynamic behaviors of the vorticity in the vicinity of the wall of the heaving elastic airfoil by FSI simulation using ANSYS 17.0/ANSYS CFX 17.0.

DOI： 10.1299/jsmemecj.2018.s0510102

CiNii Article

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Other Link： https://www.jstage.jst.go.jp/article/jsmemecj/2018/0/2018_S0510102/_pdf

Dynamic Behavior of Bubble ejected into a main flow

IKEDA Takuji, FUCHIWAKI Masaki

The Proceedings of Mechanical Engineering Congress, Japan ( The Japan Society of Mechanical Engineers ) 2018 ( 0 ) S0530305 2018.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

The gas-liquid two-phase flow is a flow in which gas and liquid are mixed, and in particular, the behavior of the gas-liquid interface is a complicated flow field with strong three-dimensional and extremely non-stationarity, it is considered difficult to understanding. In this study, we focused on clarifying the dynamic behavior of gas and the mechanism of bubbles breakup in the cross flow in which another fluid is blown into the main flow and revealed them. Concretely, we caught the three-dimensional dynamic behavior of the gas-liquid interface by VOF method using ANSYS CFX 17.2. As the results, at the gas-liquid interface of the bubble cloud, there are waves propagating from the cylinder to the rear end of the bubble cloud. These waves are formed by iso-surfaces of the pressure which stretches in a tubular shape and these periodically occur from the wall surface of cylinder.

DOI： 10.1299/jsmemecj.2018.s0530305

CiNii Article

CiNii Research

Other Link： https://www.jstage.jst.go.jp/article/jsmemecj/2018/0/2018_S0530305/_pdf

Breakup process of a bubble cloud ejected into a main flow

IKEDA Takuji, FUCHIWAKI Masaki

The Proceedings of the Fluids engineering conference ( The Japan Society of Mechanical Engineers ) 2018 ( 0 ) OS2-19 2018.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

Many studies on the dynamic behaviors of bubble in the jet in cross flow have been already reported in both experimental and numerical approaches. However, the break-up mechanism has not been understood. The authors are trying to understand the break-up mechanism from the bubble cloud to small bubbles. In this study, the authors tried to clarify the break-up process from the bubble cloud in the jet in cross flow to small bubbles using by VOF method using ANSYS CFX 17.2. The waves on the surface of the bubble cloud synchronized with the karman vortex street. Moreover, the break-up of the bubble from the bubble cloud also synchronized with the dynamic behavior of the karman vortex. Based on these results, it is predicted that the dynamic behavior of the karman vortex rolled up from the cylinder contributes to the break-up of the bubble from the bubble cloud.

DOI： 10.1299/jsmefed.2018.os2-19

CiNii Article

CiNii Research

Other Link： https://www.jstage.jst.go.jp/article/jsmefed/2018/0/2018_OS2-19/_pdf

Dynamic Behavior of Vortices Rolled up from a Heaving Elastic Airfoil by a FSI simulation Reviewed

Masaki Fuchiwaki, Kazuhiro Tanaka

Proc. of the 8th TSME International Conference on Mechanical Engineering 2017.12

Dynamic Forces Generated by a Flapping Butterfly Wing in a Fixed Condition Reviewed

2017.10

Flow structure formed by an interaction between a Jet Flow from a Fluidic Oscillator and a Main Flow Reviewed

Masaki Fuchiwaki, Surya Raghu

Proc. of the International Conference on Jets, Wakes and Separated Flows 2017.10

Characteristics of Dynamic Forces Generated by a Flapping Butterfly and Its Wake Structure Reviewed

2017.07

Cooperative Actuation of Asymmetric Bilayer Muscles based on Polypyrrole Reviewed

2017.06

Characteristics of dynamic forces generated by a flapping butterfly and its wake structure Reviewed International journal

Fuchiwaki M., Tanaka K.

American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM 1C-2017 2017.01

Elastic Deformation on Trailing edge of a Heaving Elastic Airfoil in a Separation Region and Its Dynamic Lift

IKEDA Takuji, FUCHIWAKI Masaki

The Proceedings of Mechanical Engineering Congress, Japan ( The Japan Society of Mechanical Engineers ) 2017 ( 0 ) S0520501 2017.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

The flow field around an unsteady airfoil is a common type of unsteady flow, and many researchers have experimentally and numerically investigated unsteady flows around moving airfoils. In recent years, the flow field around moving airfoils capable of flexible elastic deformation has become a focus of attention. The flow field around an elastically deforming airfoil may be understood as a fluid-structure interaction (FSI) problem, and the motion and deformation of elastic airfoils, as well as the associated dynamic behavior of the vortices, are complicated. In this study, the dynamic behavior of the vortices rolled up from the leading edge of a heaving elastic airfoil in a separation region through FSI simulation using ANSYS 16.1/ANSYS CFX 16.1. In particular, the FSI simulation of the flow field on a heaving elastic airfoil at an angle of attack of 16°, which is in the separation region under stationary conditions, and the dynamic behavior of both the leading edge vortex and the vorticity in the vicinity of the suction surface were clarified.

DOI： 10.1299/jsmemecj.2017.s0520501

CiNii Article

CiNii Research

Other Link： https://www.jstage.jst.go.jp/article/jsmemecj/2017/0/2017_S0520501/_pdf

Vortex Structure around a Heaving Elastic Airfoil in Separation Region Reviewed

2016.12

Vortex Ring Developed in Wake of a Flapping Butterfly Wing and Its Contribution to Dynamic Lift Reviewed

Proc. of the 7th International Conference on Vortex Flows and Vortex Models 2016.09

Dynamic Behaviors of Vortex Ring Rolled up by a Butterfly Wing and Its Dynamic Lift Reviewed

2016.07

Asymmetric Bilayer Artificial Muscles based on Polypyrrole Invited Reviewed

Proc. of the 5th International Conference Smart and Multifunctional Materials Structures & Systems 2016.06

Vortex rings formed behind a free-flight butterfly and their dynamic behaviors Reviewed

185 547 - 553 2016.01

Dynamic behaviors of vortex ring rolled up by a butterfly wing and its dynamic lift Reviewed

1A-2016 2016.01

Vortex structure in wake of an elastic heaving airfoil covered with wall.

Rahman Shahana, Fuchiwaki Masaki

The Proceedings of Mechanical Engineering Congress, Japan ( The Japan Society of Mechanical Engineers ) 2016 ( 0 ) S0520305 2016.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

We investigate the dynamic behavior of the vortices rolled up from the trailing edge of the heaving elastic airfoil, the wake structure and the accelerating flow in the wake by a Fluid Structure Interaction simulation using ANSYS CFX 16.0 / ANSYS 16.0. The vortices rolled up from the trailing edge of the heaving elastic airfoil covered with wall are interfered with wall strongly and the vorticity in the wake are kept high compared with that without wall. As a result, the thrust producing vortex street is formed clearly in the wake of the heaving elastic airfoil with wall and their vorticities are also kept high. Moreover, the clear accelerating flow is formed in the wake of the heaving elastic airfoil with wall and it becomes large even behind eight chord length due to the interaction between vortices and wall.

DOI： 10.1299/jsmemecj.2016.s0520305

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Other Link： https://www.jstage.jst.go.jp/article/jsmemecj/2016/0/2016_S0520305/_pdf

Dynamic Behavior of Vortices Rolled up from an Elastic Heaving Airfoil in Separation Region

FUCHIWAKI Masaki, Tanaka Kazuhiro

The Proceedings of the Fluids engineering conference ( The Japan Society of Mechanical Engineers ) 2016 ( 0 ) 0214 2016.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

Many researchers have experimentally and numerically investigated the flow field around an unsteady airfoil, which is a common unsteady flow. In particular, there have been a number of studies on the flow field around a pitching airfoil, a heaving airfoil and a combination airfoil with combined pitching and heaving motions. In recent years, the flow field in the vicinity of moving airfoils capable of flexible elastic deformation has become a focus of attention. Flow in the vicinity of an elastically deforming airfoil may be understood as a fluid-structure interaction (FSI) problem, and the motion and deformation of elastic airfoils, as well as the associated vortex flow phenomena in their vicinity, are complicated. In this study, we investigate the dynamic behavior of vortices on elastic heaving airfoil in a separation region, at 16 degree of attack angle, by fluid structure interaction simulation using ANSYS 16.1/ANSYS CFX 16.1.

DOI： 10.1299/jsmefed.2016.0214

CiNii Article

CiNii Research

Other Link： https://www.jstage.jst.go.jp/article/jsmefed/2016/0/2016_0214/_pdf

Characteristics of Dynamic Forces acting on Elastic Heaving Airfoil in a Separation Region Reviewed

2015.12

1312 Dynamic behavior of vortices rolled up from a butterfly wing and its unsteady fluid force

TAKAHASHI Ryo, FUCHIWAKI Masaki

Fluids engineering conference ... 2015 "1312 - 1"-"1312-2" 2015.11

Wake Structures of Heaving Elastic Airfoils covered with walls Reviewed

2015.09

J0260106 Basic function of conducting polymer soft actuator using ionic liquid

YANAGA Koji, FUCHIWAKI Masaki

Mechanical Engineering Congress, Japan 2015 "J0260106 - 1"-"J0260106-5" 2015.09

S0540106 Voriticies formed behind a Free Flight Butterfly and their inducied flow

TAKAHASHI Ryo, FUCHIWAKI Masaki

Mechanical Engineering Congress, Japan 2015 "S0540106 - 1"-"S0540106-5" 2015.09

S0540105 Growing Process of Vortices by Heaving Motion Located near the Wall of Thin Airfoil

SHIMADA Aiko, FUCHIWAKI Masaki

Mechanical Engineering Congress, Japan 2015 "S0540105 - 1"-"S0540105-5" 2015.09

S0510204 Interaction between a Jet from a Fluidic Oscillator and Main Flow

KUNIMOTO Chiharu, FUCHIWAKI Masaki

Mechanical Engineering Congress, Japan 2015 "S0510204 - 1"-"S0510204-5" 2015.09

Interaction of Vortices Rolled Up from a Moving Elastic Thin Film with Low Aspect Ratio Reviewed

2015.07

Growth of vortex rolled up from moving thin airfoil and their angular momentum Reviewed

2015.07

ortex Rings formed behind a Free-Flight Butterfly and Their Dynamic Behaviors Reviewed

2015.06

Polypyrrole Asymmetric Bilayer Artificial Muscle: Driven Reactions, Cooperative Actuation, and Osmotic Effects Reviewed

25 ( 10 ) 1535 - 1541 2015.01

Application of Conducting Polymer Soft Actuator to Control Equipments

FUCHIWAKI Masaki

Journal of The Society of Instrument and Control Engineers 54 ( 1 ) 60 - 61 2015.01

Momentum thickness of heaving rigid and elastic thin airfoil Reviewed

2014.11

Dynamic Behaviors of Vortex Rings Rolled up from Moving Body and Their Dynamic Forces Reviewed

2014.11

Growth of Vortex Structure around a Butterfly Wing in the Free Flight Reviewed

2014.11

Characteristics of Dynamic Thrust Acting on Elastic Heaving Airfoils by Strouhal Number and Bending Stiffness Reviewed

2014.11

Artificial Muscles based on Conducting Polymer, Polypyrrole, Move in Air and Water Reviewed

2014.11

Three-dimensional Vortex Structure around a Free Flight Butterfly Reviewed

2014.08

Dynamic Forces acting on Elastic Heaving Airfoils based on the Bending Stiffness Considerations Reviewed

2014.08

Micro pump driven by a pair of conducting polymer soft actuators Reviewed

435 - 446 2014.07

Wake Structure behind a Free Flight Butterfly and its Growth Process Reviewed

2014.06

Structural Electrochemistry from Freestanding Polypyrrole Films: Full Hydrogen Inhibition from Aqueous Solutions Reviewed

Toribio Fernandez Otero, Jose Gabriel Martinez, Masaki Fuchiwaki and Laura Valero

Advanced Functional Materials 24 ( 9 ) 1265 - 1274 2014.03

Polypyrrole para phenolsulfonic acid tape artificial muscle as a tool to clarify biomimetic driven reactions and ionic exchanges Reviewed

Masaki Fuchiwaki and Toribio Fernandez Otero

Journal of Materials Chemistry B 2 1954 - 1965 2014.02

Micro pump driven by a conducting polymer soft actuator Reviewed

80 ( 8 ) 731 - 734 2014.01

Characteristics of dynamic forces generated by a flapping butterfly Reviewed

1 A 2013.12

Vortex Pairs Formed behind a Butterfly in Free Flight, The 4th TSME International Conference on Mechanical Engineering Reviewed

Masaki Fuchiwaki, Takuya Kawahara and Kazuhiro Tanaka

The 4th TSME International Conference on Mechanical Engineering 143 (DVD-ROM) 2013.10

Dynamic Lift Produced by Vortex Ring over a Butterfly Wing Reviewed

Taichi Kuroki, Masaki Fuchiwaki and Kazuhiro Tanaka

Proc. of the 4th International Conference on Jets, Wakes and Separated Flows ID ICJWSF2013-1148 (DVD-ROM) 2013.09

Characterization of a polypyrrole-PPS Conducting Polymer Soft Actuator Reviewed

Masaki Fuchiwaki, José Gabriel Martínez and Toribio Fernandez Otero

Proc. of the XXXIV Reunión Bienal de la Real Sociedad Española de Química (DVD-ROM) 2013.09

Electrochemomechanical Deformations of Asymmetric Bilayers Conducting Polymer Actuators Exchanging Anions and Cations based on Polypyrrole Reviewed

Masaki Fuchiwaki, Toribio Fernandez Otero , Kazuhiro Tanaka

The 7th World Congress on Biomimetics, Artificial Muscles and Nano-Bio (DVD-ROM) 2013.08

Characteristics of Dynamic Force Generated by a Flapping Butterfly Reviewed

Taichi Kuroki, Masaki Fuchiwaki and Kazuhiro Tanaka

Proc. of the ASME Fluid Engineering Division Summer Meeting D FEDSM 2013-16363 2013.07

The Growth of Vortices in the Vicinity of a Wall of Elastic Moving Airfoils Reviewed

Masaki Fuchiwaki and Kazuhiro Tanaka

Proc. of the ASME Fluid Engineering Division Summer Meeting ID FEDSM 2013-16362(DVD-ROM) 2013.07

Electrochemical Behavior of a polypyrrole-PPS Conducting Polymer Actuator Reviewed

Masaki Fuchiwaki, José Gabriel Martínez and Toribio Fernandez Otero

Proc. of the XXXIV Reunión del Grupo de Electroquímica de la Real Sociedad Española de Química y XV Encontro Ibérico de Electroquímica 143 (DVD-ROM) 2013.07

Dynamics of Vortices Shed from an Elastic Heaving Thin Film by Fluid-Structure Interaction Simulation Reviewed

Nagata T., Fuchiwaki M., Tanaka K.

Intelligent Systems, Control and Automation: Science and Engineering 65 299 - 309 2013.05

Dynmaics of Vortices shed from and Elastic Heaving Thin Film by Fluid Structure Interaction Simulation Reviewed

Tetsushi Nagata, Masaki Fuchiwaki, Kazuhiro Tanaka

Springer Chapter 21 ( 65 ) 299 - 309 2013.01

Dynamic behavior of the vortex ring formed on a butterfly wing Reviewed

Masaki Fuchiwaki, Taichi Kuroki, Kazuhiro Tanaka, Takahide Tababa

Experiments in Fluids 54 ( 1450 ) DOI 10.1007/s00348-012-1450-x 2013.01

Dynamic behavior of a vortex ring over a butterfly wing and its dynamic lift Reviewed

2012.12

Vortex Flow Structures determined by Stiffness of an Elastic Moving Thin Film Reviewed

Tetsushi Nagata, Masaki Fuchiwaki and Kazuhiro Tanaka

Proc. of Int. Conference on Intelligent Unmanned Systems-2012 ICIUS2012-015, (DVD-ROM)　 2012.10

The Vortex Growth on a Wall of Elastic Airfoils and Effect of Relative Angle of Attack Reviewed

Tomoki Kurinami, Masaki Fuchiwaki and Kazuhiro Tanaka

Proc. of Int. Conference on Intelligent Unmanned Systems-2012 ICIUS2012-015, (DVD-ROM)　 2012.10

Asymmetric Bilayers Conducting Polymer Actuator Exchanging Anions and Cations based on Polypyrrole Reviewed

Masaki Fuchiwaki, Toribio Fernandez Otero, Kazuhiro Tanaka

IUMRS-International Conference on Electronic Materials (IUMRS-ICEM 2012) (DVD-ROM) 2012.09

Prediction of a Dynamic Lift Generated by a Butterfly Reviewed

Taichi Kuroki, Masaki Fuchiwaki and Kazuhiro Tanaka

Proc. of the Fifth Int. Symposium on Aero Aqua Bio-Mechanisms ID40 (DVD-ROM) 2012.08

A Pair of Vortex behind a Free Flight Butterfly Reviewed

Masaki Fuchiwaki and Kazuhiro Tanaka

Proc. of the Fifth Int. Symposium on Aero Aqua Bio-Mechanisms ID29 (DVD-ROM) 2012.08

Dynamic Lift Estimated by a Vortex Ring over a Butterfly Wing Reviewed

Masaki Fuchiwaki, Taichi Kuroki, Kazuhiro Tanaka, Takahide Tababa

18th Congress of the European Society of Biomechanics (ESB2012) ,(DVD-ROM) 2012.07

Detailed Wake Structure around Moving Elastic Airfoils and Their Characteristics of Dynamic Thrust Reviewed

Masaki Fuchiwaki, Tomoki Kurinami, Kazuhiro Tanaka, Takahide Tababa

Proceedings of ASME 2012 Fluids Engineering Summer Meeting FEDSM2012-72369, (DVD-ROM) 2012.07

Vortex Structure around Moving Elastic Bodies by Fluid Structure Interaction Simulation Reviewed

Tetsushi Nagata, Masaki Fuchiwaki and Kazuhiro Tanaka

Proc. of Int. Micro Air Vehicle Conference and Flight Competition IMAV2012-0031, (DVD-ROM)　 2012.07

The Vortex Growth on a Wall of Elastic Airfoils and Effect of Relative Angle of Attack Reviewed

Tomoki Kurinami, Masaki Fuchiwaki and Kazuhiro Tanaka

Proc. of Int. Micro Air Vehicle Conference and Flight Competition IMAV2012-0026, (DVD-ROM)　 2012.07

Dynamic Behavior of a Vortex Ring over a Butterfly Wing Reviewed

Taichi Kuroki, Masaki Fuchiwaki and Kazuhiro Tanaka

Proc. of AIAA 42nd AIAA Fluid Dynamics Conference 1282855 (DVD-ROM)　 2012.06

Concentration and temperature dependencies of asymmetric bilayers conducting polymer actuator based on polypyrrole Reviewed

Masaki Fuchiwaki, Toribio Fernandez Otero, Kazuhiro Tanaka

Second International conference on Electromechanically Active Polymer (EAP) transducers & artificial muscles (DVD-ROM) 2012.05

Characteristics of Dynamic Thrust Acting on Unsteady Elastic Airfoils Reviewed

Masaki Fuchiwaki, Tomoki Kurinami, Kazuhiro Tanaka, Takahide Tabata

Proceedings of 8th KSME-JSME Thermal and Fluids Engineering Conference 2012 2012.03

Dynamic Forces acting on Elastic Moving Thin Film and Their Vorticty Components Reviewed

Tetsushi Nagata, Masaki Fuchiwaki, Kazuhiro Tanaka

Proceedings of 8th KSME-JSME Thermal and Fluids Engineering Conference 2012 2012.03

The Growth Process of Vorticity Rolled up from Trailing Edge of Elastic Moving Airfoil, Reviewed

Tomoki Kurinami, Masaki Fuchiwaki, Kazuhiro Tanaka

Proceedings of 8th KSME-JSME Thermal and Fluids Engineering Conference 2012 2012.03

三次元内部流動様式を考慮した油圧シリンダ内部の一次元温度予測法 Reviewed

富岡弘毅,城田勇介,田中和博,渕脇正樹

日本フルードパワーシステム学会論文集第43 ( 第2 ) 39 - 45 2012.03

Wake structure around moving elastic airfoils with projections and their characteristics of dynamic forces by fluid structure interaction simulation Reviewed

1 ( PARTS A, B, C, D ) 2189 - 2196 2011.12

Vortex structure rolled up from elastic thin film by fluid structure interaction simulation Reviewed

1 ( PARTS A, B, C, D ) 2197 - 2203 2011.12

Vortex ring formed over the wings of a flapping butterfly and a small flapping robot Reviewed

2011.12

The growth of vorticity in the vicinity of a wall of an elastic moving airfoil and their developing processes Reviewed

1 ( PARTS A, B, C, D ) 2255 - 2261 2011.12

Flight Velocity Control of Small Flapping Robot by Flapping Frequency Reviewed

Tadatsugu Imura, Masaki Fuchiwaki, Kazuhiro Tanaka

Proceedings of Eighth International Conference on Flow Dynamics 2011.11

Vorticity Components of Vortices rolled up from an Elastic Moving Thin Film Reviewed

Tetsushi Nagata, Masaki Fuchiwaki, Kazuhiro Tanaka

Proceedings of Eighth International Conference on Flow Dynamics 2011.11

The Variation of Growth Process of Vortex in the Vicinity of a Wall by Elastic Deformation Reviewed

Tomoki Kurinami, Masaki Fuchiwaki, Kazuhiro Tanaka

Proceedings of Eighth International Conference on Flow Dynamics 2011.11

Development of Vorticity over a Wall of Elastic Heaving Airfoils Reviewed

Tomoki Kurinami, Masaki Fuchiwaki, Kazuhiro Tanaka, Testushi Nagata

Proceedings of The International Conference on Intelligent Unmanned Systems 2011, ICIUS2011 2011.10

Dynamics of Vortices shed from an Elastic Heaving Thin Film by Fluid Structure Interaction Simulation Reviewed

Tetsushi Nagata, Masaki Fuchiwaki, Kazuhiro Tanaka

Proceedings of The International Conference on Intelligent Unmanned Systems 2011, ICIUS2011 2011.10

Numerical Study of Cavitating flows and Cavitation Surge in a Double-Suction Volute Pump System Reviewed

K. TANAKA, T. SATO, A. INOUE, T. NAGAHARA, F. SHIMIZU, M. FUCHIWAKI

4th International Meeting on Cavitation and Dynamic Problems in Hydraulic Machinery and Systems 2011.10

Characteristic of conducting polymer actuators based on Polypyrrole Reviewed

Masaki Fuchiwaki, Toribio Fernadez Otero, Kazuhiro Tanaka

Proceedings of 6th World congress on Biomimetics, Artificial Muscles and Nano-Bio 2011.10

Study on an Ideal Elastic Deformation of the Flapping Wing Due to Some Ribs by Finite Element Method Reviewed

Aphaiwong Junchangpood, Masaki Fuchiwaki, Kazuhiro Tanaka

Proceedings of the 2nd TSME-ICoM International Conference on Mechanical Engineering 2011.10

Dynamic Behaviors of a Vortex Ring on a Butterfly and a Small Flapping Robot Reviewed

Masaki Fuchiwaki, Taichi Kuroki, Kazuhiro Tanaka, Takahide Tabata

Proceedings of International Conference on Micro Air Vehicles 2011 2011.09

Optimizetion of Actuating System for Flapping Robot Design Reviewed

Tadatsugu Imura, Masaki Fuchiwaki, Kazuhiro Tanaka

Proceedings of The 5th International Conference on Integrated Modeling and Analysis in Applied Control and Automation 2011.09

New Concept of Modeling To Predict Temperature In Oil-Hydraulic Cylinder Chamber Considering Internal Flow Reviewed

Kazuhiro Tanaka, Kouki Tomioka, Masaki Fuchiwaki, Katsuya Suzuki

The 8th International Mediterranean & Latin American Modelling Multiconference 2011.09

Vortex Structure of a Vortex Ring Over a Butterfly Wing and Its Dynamic Behavior Reviewed

Masaki Fuchiwaki, Taichi Kuroki, Kazuhiro Tanaka, Takahide Tabata

Proceedings of ASME-JSME-KSME Joint Fluids Engineering Conference 2011 2011.07

Vortex Structure rolled up from Elastic Thin Film by Fluid Structure Interaction Simulation Reviewed

Tetsushi Nagata, Masaki Fuchiwaki, Kazuhiro Tanaka

Proceedings of ASME-JSME-KSME Joint Fluids Engineering Conference 2011 2011.07

The Growth of Vorticity in the vicinity of a Wall of an Elastic Moving Airfoil and Their Developing Processes Reviewed

Tomoki Kurinami, Masaki Fuchiwaki, Kazuhiro Tanaka

Proceedings of ASME-JSME-KSME Joint Fluids Engineering Conference 2011 2011.07

The Growth of Vorticity in the vicinity of a Wall of an Elastic Moving Airfoil and Their Developing Processes Reviewed

Aphaiwong Junchangpood, Masaki Fuchiwaki, Kazuhiro TanakaTanaka

Proceedings of ASME-JSME-KSME Joint Fluids Engineering Conference 2011 2011.07

Control of Flight Altitude of a Small Flapping Robot by Wing Flapping Frequency Reviewed

Tadatsugu Imura, Masaki Fuchiwaki, Kazuhiro Tanaka

Proceedings of ASME-JSME-KSME Joint Fluids Engineering Conference 2011 2011.07

Growth and Development of a Vortex Ring over the Butterfly Wing Reviewed

Taichi Kuroki, Masaki Fuchiwaki, Kazuhiro Tanaka, Takahide Tabata

Proceedings of 9TH INTERNATIONAL SYMPOSIUM ON PARTICLE IMAGE VELOCIMETRY 2011.07

Vortex Flow Developed in the Vicinity of a Wall of an Elastic Heaving Airfoils and its Wake Structure Reviewed

Tomoki Kurinami, Masaki Fuchiwaki, Kazuhiro Tanaka

Special Issue on Jets, Wakes and Separated Flows, Vol. 6, No. 4, Vol.6 ( No.4 ) 562 - 574 2011.06

Oscillation Caused by Vortex Cavitation in a Double-Suction Volute Pump Reviewed

Proceedings of ASME-JSME-KSME Joint Fluids Engineering Conference 2011 2011.06

Movement characteristic of a bimorph conducting polymer actuators Reviewed

Masaki Fuchiwaki, Toribio Fernadez Otero, Kazuhiro Tanaka

Proceedings of First International conference on Electromechanically Active Polymer (EAP) transducers & artificial muscles 2011.06

Flight Attitude of a Small Flapping Robot and Its Flight Performance Reviewed

Tadatsugu Imura, Masaki Fuchiwaki, Kazuhiro Tanaka

Proceeding of 11th Asian Symposium on Visualization 2011.06

Numerical Visualization of Cavitating Flows in a Double-Suction Volute Pump Reviewed

Akira INOUE, Toshiyuki SATO (Hitachi Plant Technologies), Kazuhiro TANAKA, Takahide NAGAHARA (Hitachi Plant Technologies), Fumio SHIMIZU, Masaki FUCHIWAKI

The 11th ASISN Symposium on Visualization 2011.06

Optimizetion of actuating system for flapping robot design Reviewed

301 - 306 2011.01

Optimizetion of actuating system for flapping robot design Reviewed

1 301 - 306 2011.01

New concept of modeling to predict temperature in oilhydraulic cylinder chamber considering internal flow Reviewed

287 - 292 2011.01

New concept of modeling to predict temperature in oilhydraulic cylinder chamber considering internal flow Reviewed

1 287 - 292 2011.01

Vortex Cavitation from Baffle Plate and Pump Vibration in a Double-Suction Volute Pump Reviewed

Toshiyuki Sato,Takahide Nagahara,Kazuhiro Tanaka,Masaki Fuchiwaki,Fumio Shimizu and Akira Inoue

International Journal of Fluid Machinery and Systems 4 ( 1 ) 76 - 83 2011.01

スプール弁に作用する流体力に関する一考察 Reviewed

田中和博,富岡弘毅,清水文雄,渕脇正樹

日本フルードパワーシステム学会論文集 42 ( 1 ) 13 - 18 2011.01

Characteristics of butterfly wing motions and their application to micro flight robot Reviewed

2010.12

Vortex structure around heaving elastic airfoils and characteristics of dynamic thrust Reviewed

2010.12

Study on Vortex Structure and Dynamic Forces on Flapping Wing of Small Flying Robot by Numerical Simulation Reviewed

Junchangpood Aphaiwong,Masaki Fuchiwaki,Kazuhiro Tanaka

10th Global Congress on Manufacturing and Management(GCMM2010) 2010.11

Vortex Flow Developed in the Vicinity of a Wall of an Elastic Heaving Airfoil and its Dynamic Behavior Reviewed

Tomoki Kurinami,Masaki Fuchiwaki,Kazuhiro Tanaka

International Conference on Intelligent Unmanned Systems ICIUS2010 2010.11

Dynamic Behaviors of Butterfly Wing and Their Application to Small Flapping Robot Reviewed

Masaki Fuchiwaki,Tadatsugu Imura,Kazuhiro Tanaka

International Conference on Intelligent Unmanned Systems ICIUS2010 2010.11

Fluid Structure Interaction Simulation of Flow Field around Elastic Moving Airfoils Reviewed

Tetsushi Nagata,Masaki Fuchiwaki,Kazuhiro Tanaka

International Conference on Intelligent Unmanned Systems ICIUS2010 2010.11

Fuel Consumption Improvement of Vehicle with CVT by Bondgraphs, Reviewed

Katsuya Suzuki,Kazuhiro Tanaka,Sho Yamakawa,Fumio Shimizu,Masaki Fuchiwaki

The 7th International Mediterranean and Latin American Modeling Multi Conference 2010.10

Dynamic behavior of vortex ring formed on a butterfly wing and its structure Reviewed

Masaki Fuchiwaki,Taichi Kuroki,Kazuhiro Tanaka,Takahide Tababa

International Conference on Jets, Wakes and Separated Flows, ICJWSF-2010 2010.09

Study on Vortex Flow Structure and Dynamic Forces on an Elastic Heaving Airfoil by Fluid-Structure Interaction Simulation Reviewed

Tetsushi Nagata,Masaki Fuchiwaki,Kazuhiro Tanaka

International Conference on Jets, Wakes and Separated Flows, ICJWSF-2010 2010.09

Vortex Flow Developed in the Vicinity of a Wall of an Elastic Moving Airfoil and Its Wake Structure Reviewed

Tomoki Kurinami,Masaki Fuchiwaki,Kazuhiro Tanaka

International Conference on Jets, Wakes and Separated Flows, ICJWSF-2010 2010.09

Vortex cavitation and oscillation in a double-suction volute pump Reviewed

Toshiyuki Sato,Takahide Nagahara,Kazuhiro Tanaka,Masaki Fuchiwaki,Fumio Shimizu

Proceedings of the 25th IAHR Symposium on Hydraulic Machinery and Systems 1 141 - 148 2010.09

Property of electromotive force generated from electroconductive polymer film by ionic species Reviewed

Masaki Fuchiwaki,Kazuhiro Tanaka

XII International Symposium on Polymer Electrolytes 2010.09

Vortex Structure around Moving Elastic Airfoils and Their Characteristics of Dynamic Forces Reviewed

Masaki Fuchiwaki,Tomoki Kurinami,Tetsushi Nagata,Kazuhiro Tanaka,Takahide Tababa

Proceedings of ASME 2010 3rd Joint US-European Fluids Engineering Summer Meetingand 8th International Conference on Nanochannels, Microchannels, and Minichannels, FEDSM2010-ICNMM2010 2010.08

Optimization Design of Bimorph Conducting Polymer Soft Actuator and Their Application Reviewed

Yoshitaka Naka,Masaki Fuchiwaki,Kazuhiro Tanaka

International Conference on the Science and Technology of Synthetic Metals 2010.07

Feedback Control of an Ionic Conducting Polymer Soft Actuator Reviewed

Masaki Fuchiwaki,Yoshitaka Naka,Kazuhiro Tanaka

International Conference on the Science and Technology of Synthetic Metals 2010.07

Dynamic behavior of vortices on a flapping butterfly wing Reviewed

Masaki Fuchiwaki,Taichi Kuroki,Kazuhiro Tanaka,Takahide Tababa

International Symposium on Flow Visualization, ISFV14 2010.06

Retaining Control of an Ion Conducting Polymer Soft Actuato Reviewed

Masaki Fuchiwaki,Yoshitaka Naka,Kazuhiro Tanaka

Actuator 10 2010.06

Amicropump driven by a polypyrrole-based conducting polymer soft actuator Reviewed

59 ( 3 ) 352 - 356 2010.03

Fuel consumption improvement of vehicle with CVT by Bond Graphs Reviewed

21 - 26 2010.01

Fuel consumption improvement of vehicle with cvt by bond graphs Reviewed

21 - 26 2010.01

Characteristics of Butterfly Wing Motions and Their application to Micro Flight Robot Reviewed

Masaki Fuchiwaki,Tadatsugu Imura,Kazuhiro Tanaka

Proceedings of 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition 2010.01

Performance of a Micro Pump driven by Conducting Polymer Soft Actuator based on Polypyrrole Reviewed

Yoshitaka Naka,Masaki Fuchiwaki,kazuhiro Tanaka

Proceedings of International Conference on Functionalized and Sensing Materials (FuSeM 2009) 2009.12

Characteristics of a Valve-Less Micro Pump Driven by a Polypyrrole-based Conducting Polymer Soft Actuator Reviewed

Masaki Fuchiwaki,Yoshitaka Naka and Kazuhiro Tanaka

Proceedings of 5th World Congress on Biomimetics, Artificial Muscles and Nano-Bio 2009.11

Dynamic Behaviors of Butterfly Wing and Their application to Micro Flight Robot Reviewed

Tadatsugu Imura,Masaki Fuchiwaki,kazuhiro Tanaka

Proceedings of the ASME Fluids Engineering Division Summer Meeting, FEDSM2009 2009.08

Wake structure of Heaving Elastic Airfoils and Their Dynamic Thrust Reviewed

Masaki Fuchiwaki,Tomoki Kurinami,Kazuhiro Tanaka,Takahide Tabata

Proceedings of the ASME Fluids Engineering Division Summer Meeting, FEDSM2009 2009.08

Efficiency of a Micro Pump driven by Conducting polymer soft actuator with open/close movement Reviewed

Yoshitaka Naka,Masaki Fuchiwaki,kazuhiro Tanaka

Proceedings of ICROS-SICE International Joint Conference 2009 2009.08

A micro pump driven by conducting polymer soft actuator based on polypyrrole Reviewed

Yoshitaka Naka,Masaki Fuchiwaki,kazuhiro Tanaka

Proceedings of the ASME Fluids Engineering Division Summer Meeting, FEDSM2009 2009.08

Vortex Flow Visualization of a Flapping Butterfly Wing Performing a Fixed Flight Reviewed

Masaki Fuchiwaki,Kazuhiro Tanaka

Proceedings of Society for Experimental Biology 2009 (2009) 2009.06

Detailed Wake Structure behind an Elastic Airfoil Reviewed

Masaki Fuchiwaki,Tomoki Kurinami,Kazuhiro Tanaka

Journal of Fluid Science and Technology 4 391 - 400 2009.04

固定飛翔する蝶の翅上に形成される渦流れ

渕脇正樹,川野貴史,田中和博,田畑隆英

第21回バイオエンジニアリング講演会講演論文集 ( 08-53 ) 241 - 242 2009.04

Planate conducting polymer actuator based on polypyrrole and its application Reviewed

Masaki Fuchiwaki,Kazuhiro Tanaka,Keiichi Kaneto

Sensors and Actuators A; Physical 150 272 - 276 2009.02

A Micro Pump Driven by a Polypyrrole-based Conducting Polymer Soft Actuator Reviewed

Yoshitaka Naka ,Masaki Fuchiwaki,Kazuhiro Tanaka

Polymer International 59 352 - 356 2009.02

Characteristics of a Micro Pump using Conducting Polymer Soft Actuator Reviewed

Y.NAKA,M.FUCHIWAKI,K.TANAKA

Proceedings of the 25th Sensor Symposium 807 - 808 2008.04

Detailed Wake Structure behind a Elastic Airfoil Reviewed

Masaki Fuchiwaki,Kazuhiro Tanaka

Int. Conf. on Jets,Wakes and Separated Flows,ICJWSF-2008 2008.04

A Micro Pump Driven by Conducting Polymer Soft Actuator with Open/Close movement Reviewed

Yoshitaka Naka,Masaki Fuchiwaki,Kazuhiro Tanaka

Proceedings of The Seventh JSME-KSME Thermal and Fluids Engineering Conference (TFEC7) 2008.04

Vortex Flow behind a Heaving Elastic Flat Plate Reviewed

Masaki Fuchiwaki,Kazuhiro Tanaka

Proceedings of the Fluids Engineering Division Summer Conference,FEDSM2008 2008.04

Characteristic of Micro Pump Driven by Conducting Polymer Soft Actuator Reviewed

Yoshitaka Naka,Masaki Fuchiwaki,Kazuhiro Tanaka

Proceedings of the Fluids Engineering Division Summer Conference,FEDSM2008 2008.04

Dynamic Behavior of Butterfly Wing and its Vortex Flow Reviewed

Masaki Fuchiwaki,Kazuhiro Tanaka

ISFV 13-13th International Symposium on Flow Visualization FLUVISU 12-12th French Congress on Visualization in Fluid Mechanics 2008.04

Vortex Flow Visualization behind an Unsteady Elastic Airfoil Reviewed

Masaki Fuchiwaki,Kazuhiro Tanaka

Proceedings of The Seventh JSME-KSME Thermal and Fluids Engineering Conference (TFEC7) 2008.04

イオン導電性高分子ソフトアクチュエータの一定値保持制御

中喜隆,渕脇正樹,田中和博

第54回高分子研究発表会（神戸） 79 - 79 2008.04

導電性高分子ソフトアクチュエータを駆動源とするマイクロポンプの基礎性能

渕脇正樹,中喜隆,田中和博

第54回高分子研究発表会（神戸） 78 - 78 2008.04

Conducting Polymer Actuator in Open-Close movement and Its Application to Micro Pump Reviewed

M.Fuchiwaki,K.Tanaka,K.Kaneto

Ⅳ World Congress on Biomimetics, Artificial Muscles & Nano-Bio 2007 45 - 45 2007.11

GEOMETRIC PROPERTY OF FLAPPING MOTION ON A BUTTERFLY WING Reviewed

Masaki Fuchiwaki,Kazuhiro Tanaka

FLUCOME 2007 2007.09

弾性を有する平板翼後流の渦流れ

渕脇正樹,田中和博

日本機械学会創立110周年記念　2007年度年次大会 2 ( 07-1 ) 311 - 312 2007.09

CHARACTERISTICS OF DYNAMIC THRUST ON AN UNSTEADY AIRFOIL IN PITCHING AND HEAVING MOTIONS Reviewed

Masaki Fuchiwaki,Kazuhiro Tanaka,Masahiro Nakashima

FEDSM 2007 2007.08

BIMORPH TYPE SOFT ACTUATOR BASED ON CONDUCTING POLYMER AND ITS APPLICATION TO MICRO PUMP Reviewed

Masaki Fichiwaki,Yoshitaka Naka,Kazuhiro tanaka

FEDSM 2007 2007.08

Detailed Wake Structure behind Unsteady Airfoils and Characteristics of Dynamic Thrust Reviewed

Masaki FUCHIWAKI,Kazuhiro TANAKA

IUTAM Symposium on Unsteady Separated Flowns and their Control 2007.06

Dynamic behavior of Butterfly Wing on Free and Bound Flights Reviewed

M.Fuchiwaki,K.Tanaka

The 9th Asian Symposium on Visualization 267 - 268 2007.06

非定常運動翼後流の渦流れと非定常推進力 Reviewed

渕脇正樹,田中和博,永山勝也

日本機械学会論文集（B編） 73 ( 728 ) 922 - 929 2007.04

ピッチング運動翼から発生する渦の挙動と非定常流体力 Reviewed

渕脇正樹,田中和博

日本機械学会論文集（B編） 73 ( 726 ) 419 - 427 2007.02

Vortex Flow on a Butterfly Wing Reviewed

Masaki FUCHIAKI,Kazuhiro TANAKA

12th International Symposium on Flow Visualization 2006.09

Planate Conducting Polymer Actuator and Its Application Reviewed

Masaki FUCHIWAKI,Kazuhiro TANAKA,Keiichi KANETO

Proceedings of FEDSM2006 2006 Joint U.S.-European Fluids Engineering Summer Meeting FEDSM2006-98486 2006.07

Vortex Flow behind an Unsteady Airfoil in Pitching and Heaving Motions and Dynamic Thrust Reviewed

Masaki FUCHIWAKI,Kazuhiro TANAKA

Proceedings of FEDSM2006 2006 Joint U.S.-European Fluids Engineering Summer Meeting FEDSM2006-98487(CD-ROM) 2006.07

Planate Soft Actuator based on Polypyrrole Film and Its Application Reviewed

Masaki FUCHIWAKI,Kazuhiro TANAKA,Keiichi KANETO

Hokkaido Univ-AIST collaborative conferene 2006.05

Vortex Structure and Scale on an Unsteady Airfoil Reviewed

Masaki FUCHIWAKI,Kazuhiro TANAKA

JSME International Journal(Series B) 49 ( 4 ) 1056 - 1063 2006.04

Effect of Film Morphorogy on the Actuatoion Behavior in Polypyrrole Films Reviewed

Shyam Sudhir Pandey,Wataru Takashima,Masaki Fuchiwaki,Keiichi Kaneto

Synthetic Metals 135 59 - 60 2005.04

ヒービング運動翼に働く非定常流体力 Reviewed

梁昌照，田中和博，渕脇正樹

日本機械学会誌（B）編 71 ( 701 ) 104 - 110 2005.04

Wake Structure and Dynamic Thrust of an Unsteady Airfoil Reviewed

Masaki Fuchiwaki,Kazuhiro Tanaka

2005 ASME Fluids Engineering Division Summer Meeting and Exhibition 2005.04

Modeling and Ionic Characteristics of an Ion Conducting Polymer Actuator Reviewed

Masaki Fuchiwaki,Kazuhiro Tanaka

4th World Congress on Industrial Process Tomography 2005.04

Detailed Vortex Structure on the wake of unsteady airfoils and dynamic thrust Reviewed

Masaki Fuchiwaki,Kazuhiro Tanaka

16th International Symposium on Transport phenomena 2005.04

Vortex Structure and Jet Characteristics behind Unsteady Airfoils Reviewed

Masaki Fuchiwaki,Kazuhiro Tanaka

The 7th Asian Symposium on Visualization 2005.04

Characteristics of Dynamic Thrust acting on Unsteady Airfoils Reviewed

Masaki Fuchiwaki,Kazuhiro Tanaka

The 6th KSME-JSME Thermal & Fluids Engineering Conference 2005.04

Vortex Flow Visualization behind Unsteady Airfoils at Low Reynolds Number Region Reviewed

Masaki Fuchiwaki,Kazuhiro Tanaka

The Third International Conference on Vortex Flows and Vortex Models 167 - 167 2005.04

Vortex Structure and Scale on an Unsteady Airfoil Reviewed

Masaki Fuchiwaki,Kazuhiro Tanaka

International Conference on Jets, Wakes and Separated Flows 591 - 591 2005.04

Vortex structure in unsteady separation on an unsteady airf Reviewed

Masaki Fuchiwaki,Kazuhiro Tanaka

International Conference on Advanced Optical Diagnostics in Fluids, Solids and Combustion 2004.04

Flow control around an Airfoil by an artificial Muscle Reviewed

Masaki Fuchiwaki,Kazuhiro Tanaka,Shingo Sewa,Kazuo Onishi

The Second Conference on Artificial Muscles 2004.04

Detailed Vortex Structure on the Wake of Unsteady Airfoils Reviewed

Masaki Fuchiwaki,Kazuhiro Tanaka

11th International Symposium on Flow Visualization 2004.04

Proposal of Novel Actuators Using Conducting Polymer Laminates Reviewed

Masaki Fuchiwaki,Wataru Takashima,Shyam Sudhir Pandey,Keiichi Kaneto

Synthetic Metals 135 135 - 136 2003.04

Effective Control of Vortex Shedding by an Artificial Muscle Reviewed

Masaki Fuchiwaki,Kazuhiro Tanaka,Shingo Sewa,Kazuo Onishi

7th International Symposium on Fluid Control, Measurement and Visualization 2003.04

Unsteady Separation and Vortex around Moving Airfoil Reviewed

Masaki Fuchiwaki,Chang Jo Yang,Kazuhiro Tanaka

4th JSME/ASME Joint Fluids Engineering Division Annual Summer Meeting 2003.04

Detailed Visualization of Re-circulation Region on Unsteady Airfoils Reviewed

Masaki Fuchiwaki,Chang Jo Yang,Kazuhiro Tanaka

The 7th Asian Symposium on Visualization 2003.04

Vortex Control by an Artificial Muscle Based on a Conducting Polymer Reviewed

Masaki Fuchiwaki,Kazuhiro Tanaka,Shingo Sewa,Kazuo Onishi

4th JSME/ASME Joint Fluids Engineering Division Annual Summer Meeting 2003.04

Experimental and Numerical Analysis of Unsteady Separation Around an Unsteady Airfoil Reviewed

Masaki Fuchiwaki,Chang Jo Yang,Kazuhiro Tanaka

7th International Symposium on Fluid Control, Measurement and Visualization 2003.04

Unsteady Fluid Forces and Flow Patterns of a Heaving Airfoil Reviewed

Chang Jo Yang,Masaki Fuchiwaki,Kazuhiro Tanaka,Young-Ho Lee

The Fifth JSME-KSME Fluids Engineering Conference 435 - 435 2002.11

Vortex Scale of Unsteady Separation on a Pitching Airfoil Reviewed

Masaki FUCHIWAKI,Kazuhiro Tanaka

Visualization and Imaging in Transport Phenomena 972 61 - 66 2002.04

Soft Actuators Based on Poly(3-alkyl thiophene) Films Upon Electrochemical Oxidation and Reduction Reviewed

Masaki FUCHIWAKI,Wataru TAKASHIMA,Keiichi Kaneto

Molecular Crystals and Liquid Crystals 374 513 - 520 2002.04

Cyclic Step-voltammetric Analysis of Cation-driven and Anion-driven Actuation in Polypyrrole Films Reviewed

Wataru Takashima,Shyam S Pandy,Masaki Fuchiwaki,Keiichi Kaneto

Japanese Journal of Applied Physics, December 41 ( 12 ) 7532 - 7536 2002.04

Dynamic Thrust and Vortex on a Pitching Airfoil Reviewed

Masaki Fuchiwaki,Kazuhiro Tanaka,Tatsuya Hayashi

The 10th International Symposium on Flow Visualization 2002.04

Proposal of Novel Actuators Using Conducting Polymer Laminates Reviewed

Masaki Fuchiwaki,Wataru Takashima,Shyam Sudhir Pandey,Keiichi Kaneto

International Conference on Science and Technology of Synthetic Metals 2002.04

Flow Control by an Artificial Muscle Reviewed

Masaki Fuchiwaki,Kazuhiro Tanaka,Keiichi Kaneto

The 10th International Symposium on Flow Visualization 2002.04

Comparative Study of Electrochemomechanical Deformations of poly (3-alkylthiophene)s, Polyanilines and Polypyrrole Films Reviewed

Masaki FUCHIWAKI,Wataru TAKASHIMA,Keiichi Kaneto

Japanese Journal of Applied Physics 40 ( 12 ) 7110 - 7116 2001.12

Study on Propulsion Characteristics of a Pitching Airfoil Reviewed

Chang Jo Yang,Tatsuya Hayashi,Masaki Fuchiwaki,Kazuhiro Tanaka

Proceedings of International Conference on Marine Engineering 313 - 318 2001.10

Two Dimensional Structure of the Wake behind a Pitching Airfoil with Higher Non-dimensional Pitching Rate Reviewed

Masaki FUCHIWAKI,Kazuhiro TANAKA

Journal of Visualization 4 ( 4 ) 323 - 329 2001.04

Soft Actuators Base on Conducting Polymers, Polypyrrole and Polythiophen Films Reviewed

Masaki Fuchiwaki,Wataru Takashima,Keiichi Kaneto

Sixth International Conference on Frontiers of Polymers and Advances Materials 2001.04

Vortex Structure in Unsteady Separation around a Pitching Airfoil Reviewed

Masaki Fuchiwaki,Kazuhiro TANAKA

International Symposium on Visualization and Imaging in Transport Phenomena 2001.04

Arrangement and Dynamic Behavior of Vortices from a Pitching airfoil Reviewed

Masaki FUCHIWAKI,KazuhiroTANAKA

JSME International Journal, Series B 43 ( 3 ) 443 - 448 2000.04

Two Dimensional Structure on the wake of a Pitching Airfoil with Higher Non-dimensional Pitching Rate Reviewed

Masaki Fuchiwaki,Kazuhiro TANAKA,Tatsuya HAYASHI,Kazutaka NAGASHIMA

9th International Symposium on Flow Visualization 2000.04

ピッチング運動翼に働く非定常流体力 Reviewed

渕脇正樹,田中和博,田中博喜

日本機械学会誌（B）編 65 ( 634 ) 1970 - 1977 1999.06

ピッチング運動翼より発生するはく離渦の挙動とその構造 Reviewed

渕脇正樹,田中和博,田中彰

日本機械学会誌（B）編 65 ( 632 ) 1271 - 1276 1999.04

Flow Patterns Behind Pitching Airfoil and Unsteady Fluid Forces Reviewed

Masaki FUCHIWAKI,Kazuhiro TANAKA,Hiroki TANAKA,Kyoji KAMEMOTO,Oktay Baysal

3rd ASME/JSME Joint Fluids Engineering Division Annual Summer Meeting 1999.04

Unsteady Characteristics of Lift Acting on a Pitching Airfoil Reviewed

Masaki FUCHIWAKI,Kazuhiro TANAKA,Hiroki TANAKA

ASME Fluids Engineering Division Annual Summer Meeting 1999.04

Dynamic Behavior of Vortices from an Airfoil Undergoing Pitching Motion Reviewed

Masaki FUCHIWAKI,Kazuhiro TANAKA,Oktay Baysal

ASME Fluids Engineering Division Annual Summer Meeting 1998.04

Discrete Vortex Visualization on the Integrated Streakline of Unsteady Separation Reviewed

Masaki FUCHIWAKI,Kazuhiro TANAKA,Hiroki TANAKA,Takeshi NAKADA

8th International Symposium on Flow Visualization 1998.04

Unsteady Fluid Forces on an Airfoil Undergoing Pitching Motion Reviewed

Masaki FUCHIWAKI,Kazuhiro TANAKA,Hiroki TANAKA

The Fourth KSME-JSME Fluids Engineering Conference 337 - 340 1998.04

Unsteady Separation and Dynamic Lift around an Airfoil Undergoing Pitching Motion Reviewed

Kazuhiro TANAKA,Masaki FUCHIWAKI,Hiroshi TSUKAMOTO,Hiroki TANAKA

ASME Fluids Engineering Division Annual Summer Meeting 1997.04

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Papers - FUCHIWAKI Masaki