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Koji Fukagata
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Proceedings Papers

CNN-SINDy Based Reduced Order Modeling of Unsteady Flow Fields

Takaaki Murata, Kai Fukami, Koji Fukagata
Proc. ASME. AJKFluids2019, Volume 2: Computational Fluid Dynamics, V002T02A074, July 28–August 1, 2019
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2019-5056
https://doi.org/10.1115/AJKFluids2019-5056
View Paper titled, CNN-SINDy Based Reduced Order Modeling of Unsteady Flow Fields
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Topics: Artificial neural networks, Circular cylinders, Computation, Computer simulation, Errors, Flow (Dynamics), Modeling, Nonlinear dynamics, Principal component analysis, Unsteady flow
Proceedings Papers

Data-Driven Reduced Order Modeling of Flows Around Two-Dimensional Bluff Bodies of Various Shapes

Kazuto Hasegawa, Kai Fukami, Takaaki Murata, Koji Fukagata
Proc. ASME. AJKFluids2019, Volume 2: Computational Fluid Dynamics, V002T02A075, July 28–August 1, 2019
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2019-5079
https://doi.org/10.1115/AJKFluids2019-5079
View Paper titled, Data-Driven Reduced Order Modeling of Flows Around Two-Dimensional Bluff Bodies of Various Shapes
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Topics: Flow (Dynamics), Modeling, Shapes, Machinery, Reynolds number, Unsteady flow, Circular cylinders, Computational fluid dynamics, Computer simulation
Proceedings Papers

Parametric Study for Optimization of Blowing and Suction Locations for Improving Lift-to-Drag Ratio on a Clark-Y Airfoil

Masahiro Ohashi, Yuki Morita, Shiho Hirokawa, Koji Fukagata, Naoko Tokugawa
Proc. ASME. AJKFluids2019, Volume 1: Fluid Mechanics, V001T01A033, July 28–August 1, 2019
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2019-5067
https://doi.org/10.1115/AJKFluids2019-5067
View Paper titled, Parametric Study for Optimization of Blowing and Suction Locations for Improving Lift-to-Drag Ratio on a Clark-Y Airfoil
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Topics: Airfoils, Drag (Fluid dynamics), Optimization, Suction, Friction, Chords (Trusses), Drag reduction, Flow (Dynamics), Navier-Stokes equations, Reynolds number
Proceedings Papers

Experimental Investigations on Friction Drag Reduction on an Airfoil by Passive Blowing

Shiho Hirokawa, Kaoruko Eto, Koji Fukagata, Naoko Tokugawa
Proc. ASME. AJKFluids2019, Volume 1: Fluid Mechanics, V001T01A034, July 28–August 1, 2019
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2019-5068
https://doi.org/10.1115/AJKFluids2019-5068
View Paper titled, Experimental Investigations on Friction Drag Reduction on an Airfoil by Passive Blowing
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Topics: Airfoils, Drag reduction, Friction, Suction, Wings, Chords (Trusses), Pressure, Pressure gradient, Reynolds number, Skin friction (Fluid dynamics)
Proceedings Papers

Resolvent Analysis of Turbulent Friction Drag Reduction by Manipulation of Mean Velocity Profile

Riko Uekusa, Aika Kawagoe, Yusuke Nabae, Koji Fukagata
Proc. ASME. AJKFluids2019, Volume 1: Fluid Mechanics, V001T01A035, July 28–August 1, 2019
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2019-5125
https://doi.org/10.1115/AJKFluids2019-5125
View Paper titled, Resolvent Analysis of Turbulent Friction Drag Reduction by Manipulation of Mean Velocity Profile
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Topics: Drag reduction, Friction, Turbulence, Channel flow, Fluids, Laminar flow, Viscosity
Proceedings Papers

Experimental Study on Suppression of Vortex Shedding Behind a Square Cylinder Using Opposed-Type Plasma Actuators

Akira Nakazawa, Takuto Yonemichi, Koji Fukagata
Proc. ASME. AJKFluids2019, Volume 1: Fluid Mechanics, V001T01A004, July 28–August 1, 2019
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2019-5065
https://doi.org/10.1115/AJKFluids2019-5065
View Paper titled, Experimental Study on Suppression of Vortex Shedding Behind a Square Cylinder Using Opposed-Type Plasma Actuators
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Topics: Actuators, Cylinders, Plasmas (Ionized gases), Vortex shedding, Flow (Dynamics), Vortex street, Aircraft, Collisions (Physics), Drag (Fluid dynamics), Electrodes
Proceedings Papers

A Smoothed Void Fraction Approach for the Detection of Bubble Clusters

Claudio Santarelli, Kazutaka Hashimoto, Koji Fukagata, Jochen Fröhlich
Proc. ASME. FEDSM2014, Volume 1C, Symposia: Fundamental Issues and Perspectives in Fluid Mechanics; Industrial and Environmental Applications of Fluid Mechanics; Issues and Perspectives in Automotive Flows; Gas-Solid Flows: Dedicated to the Memory of Professor Clayton T. Crowe; Numerical Methods for Multiphase Flow; Transport Phenomena in Energy Conversion From Clean and Sustainable Resources; Transport Phenomena in Materials Processing and Manufacturing Processes, V01CT23A007, August 3–7, 2014
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2014-21244
https://doi.org/10.1115/FEDSM2014-21244
View Paper titled, A Smoothed Void Fraction Approach for the Detection of Bubble Clusters
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Topics: Bubbles, Porosity, Channel flow, Engineering simulation, Simulation
Proceedings Papers

Opposition Control of Turbulent Taylor-Couette Flow

Christophe Le Dauphin, Koji Fukagata
Proc. ASME. AJK2011, ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D, 3895-3903, July 24–29, 2011
Publisher: American Society of Mechanical Engineers
Paper No: AJK2011-25007
https://doi.org/10.1115/AJK2011-25007
View Paper titled, Opposition Control of Turbulent Taylor-Couette Flow
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Topics: Flow (Dynamics), Turbulence, Boundary layers, Computer simulation, Displacement, Drag (Fluid dynamics), Drag reduction, Skin friction (Fluid dynamics), Statistics, Visualization
Proceedings Papers

Direct Numerical Simulation of Turbulent Friction Drag Reduction by Traveling Wave-Like Blowing Using Plasma Actuators

Yasuhito Murai, Koji Fukagata
Proc. ASME. AJK2011, ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D, 3905-3910, July 24–29, 2011
Publisher: American Society of Mechanical Engineers
Paper No: AJK2011-25008
https://doi.org/10.1115/AJK2011-25008
View Paper titled, Direct Numerical Simulation of Turbulent Friction Drag Reduction by Traveling Wave-Like Blowing Using Plasma Actuators
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Topics: Actuators, Computer simulation, Drag reduction, Friction, Plasmas (Ionized gases), Turbulence, Waves, Drag (Fluid dynamics), Flow (Dynamics), Navier-Stokes equations
Proceedings Papers

Numerical Simulation of Mixing Enhancement and Suppression in Two-Dimensional Mixing Layer

Masayuki Kawagoe, Koji Fukagata
Proc. ASME. AJK2011, ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D, 3871-3877, July 24–29, 2011
Publisher: American Society of Mechanical Engineers
Paper No: AJK2011-25003
https://doi.org/10.1115/AJK2011-25003
View Paper titled, Numerical Simulation of Mixing Enhancement and Suppression in Two-Dimensional Mixing Layer
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Topics: Computer simulation, Momentum, Actuators, Chemical reactions, Vortices, Vorticity
Journal Articles

Control of Turbulent Transport: Less Friction and More Heat Transfer

Nobuhide Kasagi, Yosuke Hasegawa, Koji Fukagata, Kaoru Iwamoto
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. March 2012, 134(3): 031009.
https://doi.org/10.1115/1.4005151
Published Online: January 13, 2012
View Article titled, Control of Turbulent Transport: Less Friction and More Heat Transfer
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Topics: Friction, Heat, Heat transfer, Momentum, Temperature, Turbulence, Flow (Dynamics), Skin friction (Fluid dynamics), Heat flux, Boundary-value problems
Proceedings Papers

Control of Turbulent Transport: Less Friction and More Heat Transfer

Nobuhide Kasagi, Yosuke Hasegawa, Koji Fukagata, Kaoru Iwamoto
Proc. ASME. IHTC14, 2010 14th International Heat Transfer Conference, Volume 8, 309-324, August 8–13, 2010
Publisher: American Society of Mechanical Engineers
Paper No: IHTC14-23344
https://doi.org/10.1115/IHTC14-23344
View Paper titled, Control of Turbulent Transport: Less Friction and More Heat Transfer
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Topics: Friction, Heat transfer, Turbulence, Heat, Momentum, Flow (Dynamics), Boundary-value problems, Convection, Design, Entropy
Proceedings Papers

Numerical Analysis of Heat/Mass Transfer and Electrochemical Reaction in an Anode-Supported Flat-Tube Solid Oxide Fuel Cell

Masayuki Suzuki, Naoki Shikazono, Koji Fukagata, Nobuhide Kasagi
Proc. ASME. FUELCELL2006, ASME 2006 Fourth International Conference on Fuel Cell Science, Engineering and Technology, Parts A and B, 595-603, June 19–21, 2006
Publisher: American Society of Mechanical Engineers
Paper No: FUELCELL2006-97112
https://doi.org/10.1115/FUELCELL2006-97112
View Paper titled, Numerical Analysis of Heat/Mass Transfer and Electrochemical Reaction in an Anode-Supported Flat-Tube Solid Oxide Fuel Cell
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Topics: Anodes, Electrochemical reactions, Heat, Mass transfer, Numerical analysis, Simulation, Solid oxide fuel cells