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Takashi Tokumasu
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Proceedings Papers

Effects of Compression on GDL Microstructure by High-Resolution X-Ray Computed Tomography

Navvab Khajeh Hosseini D., Takashi Sasabe, Takashi Tokumasu, Ugur Pasaogullari
Proc. ASME. FUELCELL2013, ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology, V001T01A018, July 14–19, 2013
Publisher: American Society of Mechanical Engineers
Paper No: FuelCell2013-18405
https://doi.org/10.1115/FuelCell2013-18405
View Paper titled, Effects of Compression on GDL Microstructure by High-Resolution X-Ray Computed Tomography
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Topics: Compression, Computerized tomography, Gas diffusion layers, Resolution (Optics), Proton exchange membrane fuel cells, Porosity, Catalysts, Contact resistance, Fluids, Heat
Proceedings Papers

Molecular Dynamics Study of Proton and Water Transport in Nafion Membrane

Takuya Mabuchi, Takashi Tokumasu
Proc. ASME. ICNMM2013, ASME 2013 11th International Conference on Nanochannels, Microchannels, and Minichannels, V001T07A001, June 16–19, 2013
Publisher: American Society of Mechanical Engineers
Paper No: ICNMM2013-73084
https://doi.org/10.1115/ICNMM2013-73084
View Paper titled, Molecular Dynamics Study of Proton and Water Transport in Nafion Membrane
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Topics: Membranes, Molecular dynamics, Protons, Water, Ions, Density, Diffusion (Physics), Dynamics (Mechanics), Engineering simulation, Mesoscopic systems
Proceedings Papers

A Molecular Dynamics Analysis of Quantum Effect on the Thermodynamic Properties of Liquid Hydrogen

Hiroki Nagashima, Shin-ichi Tsuda, Nobuyuki Tsuboi, Mitsuo Koshi, A. Koichi Hayashi, Takashi Tokumasu
Proc. ASME. ICNMM2013, ASME 2013 11th International Conference on Nanochannels, Microchannels, and Minichannels, V001T12A014, June 16–19, 2013
Publisher: American Society of Mechanical Engineers
Paper No: ICNMM2013-73161
https://doi.org/10.1115/ICNMM2013-73161
View Paper titled, A Molecular Dynamics Analysis of Quantum Effect on the Thermodynamic Properties of Liquid Hydrogen
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Topics: Hydrogen, Molecular dynamics, Simulation, Simulation results, Temperature, Density, Diffusion (Physics), Energy transformation, Equations of state, Fuels
Proceedings Papers

Molecular Dynamics Study of Oxygen Permeation Through the Ionomer of PEFC Catalyst Layer

Kiminori Sakai, Takashi Tokumasu
Proc. ASME. AJK2011, ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 2, Fora, 349-352, July 24–29, 2011
Publisher: American Society of Mechanical Engineers
Paper No: AJK2011-36020
https://doi.org/10.1115/AJK2011-36020
View Paper titled, Molecular Dynamics Study of Oxygen Permeation Through the Ionomer of PEFC Catalyst Layer
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Topics: Catalysts, Molecular dynamics, Oxygen, Water, Permeability, Energy conversion, Molecular dynamics simulation, Platinum, Proton exchange membrane fuel cells, Protons
Proceedings Papers

An Estimation of Thermodynamic and Transport Properties of Cryogenic Hydrogen Using Classical Molecular Simulation

Hiroki Nagashima, Takashi Tokumasu, Shin-ichi Tsuda, Nobuyuki Tsuboi, Mitsuo Koshi, A. Koichi Hayashi
Proc. ASME. AJK2011, ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 2, Fora, 289-299, July 24–29, 2011
Publisher: American Society of Mechanical Engineers
Paper No: AJK2011-36005
https://doi.org/10.1115/AJK2011-36005
View Paper titled, An Estimation of Thermodynamic and Transport Properties of Cryogenic Hydrogen Using Classical Molecular Simulation
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Topics: Hydrogen, Simulation, National Institute of Standards and Technology, Density, Diffusion (Physics), Equations of state, Molecular dynamics, Molecular orbitals, Temperature, Thermal conductivity
Proceedings Papers

A Molecular Dynamics Study for the Characteristics of Proton Transfer in Polymer Electrolyte Membrane

Takashi Tokumasu, Taiki Yoshida
Proc. ASME. AJK2011, ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 2, Fora, 353-357, July 24–29, 2011
Publisher: American Society of Mechanical Engineers
Paper No: AJK2011-36021
https://doi.org/10.1115/AJK2011-36021
View Paper titled, A Molecular Dynamics Study for the Characteristics of Proton Transfer in Polymer Electrolyte Membrane
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Topics: Molecular dynamics, Proton exchange membranes, Protons, Fuel cells, Density functional theory, Displacement, Electrolytes, Membranes, Molecular dynamics simulation, Nanoscale phenomena
Proceedings Papers

Proton Transfer in Polymer Electrolyte Membrane by Molecular Dynamics Method

Takashi Tokumasu
Proc. ASME. FUELCELL2011, ASME 2011 9th International Conference on Fuel Cell Science, Engineering and Technology, 869-873, August 7–10, 2011
Publisher: American Society of Mechanical Engineers
Paper No: FuelCell2011-54963
https://doi.org/10.1115/FuelCell2011-54963
View Paper titled, Proton Transfer in Polymer Electrolyte Membrane by Molecular Dynamics Method
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Topics: Membranes, Molecular dynamics, Molecular dynamics methods, Proton exchange membranes, Protons
Proceedings Papers

A Molecular Dynamics Study for Diffusivity of Proton in Polymer Electrolyte Membrane

Takashi Tokumasu, Taiki Yoshida
Proc. ASME. AJTEC2011, ASME/JSME 2011 8th Thermal Engineering Joint Conference, T30077, March 13–17, 2011
Publisher: American Society of Mechanical Engineers
Paper No: AJTEC2011-44195
https://doi.org/10.1115/AJTEC2011-44195
View Paper titled, A Molecular Dynamics Study for Diffusivity of Proton in Polymer Electrolyte Membrane
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Topics: Membranes, Molecular dynamics, Proton exchange membranes, Protons
Proceedings Papers

The Dependence of Molecular Motion on the Dissociative Adsorption of H 2 on Pt(111)

Takashi Tokumasu, Daigo Ito
Proc. ASME. HT2007, ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference, Volume 1, 47-51, July 8–12, 2007
Publisher: American Society of Mechanical Engineers
Paper No: HT2007-32590
https://doi.org/10.1115/HT2007-32590
View Paper titled, The Dependence of Molecular Motion on the Dissociative Adsorption of H 2 on Pt(111)
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Topics: Atoms, Density functional theory, Engineering simulation, Hydrogen, Molecular dynamics, Platinum, Probability, Rotation, Simulation, Temperature
Proceedings Papers

Molecular Dynamics Study of Heterogeneous Bubble Nucleation in Liquid Oxygen Including Helium, Nitrogen, or Argon

Shin-Ichi Tsuda, Takashi Tokumasu, Kenjiro Kamijo, Yoichiro Matsumoto
Proc. ASME. FEDSM2002, Volume 1: Fora, Parts A and B, 455-460, July 14–18, 2002
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2002-31022
https://doi.org/10.1115/FEDSM2002-31022
View Paper titled, Molecular Dynamics Study of Heterogeneous Bubble Nucleation in Liquid Oxygen Including Helium, Nitrogen, or Argon
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Topics: Bubbles, Helium, Molecular dynamics, Nitrogen, Nucleation (Physics), Oxygen, Density, Lennard-Jones potential, Molecular dynamics methods
Proceedings Papers

A Numerical Study of Thermodynamic Effects of Sheet Cavitation

Takashi Tokumasu, Kenjiro Kamijo, Yoichiro Matsumoto
Proc. ASME. FEDSM2002, Volume 1: Fora, Parts A and B, 377-382, July 14–18, 2002
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2002-31008
https://doi.org/10.1115/FEDSM2002-31008
View Paper titled, A Numerical Study of Thermodynamic Effects of Sheet Cavitation
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Topics: Cavitation, Fluids, Temperature, Cavities, Hydraulic equipment, Hydrofoil, Latent heat, Pumps, Reynolds number, Rockets
Proceedings Papers

Thermodynamic Effect on a Cavitating Inducer in Liquid Nitrogen

Yoshiki Yoshida, Kengo Kikuta, Satoshi Hasegawa, Mitsuru Shimagaki, Noriaki Nakamura, Takashi Tokumasu
Proc. ASME. FEDSM2005, Volume 2: Fora, 591-596, June 19–23, 2005
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2005-77430
https://doi.org/10.1115/FEDSM2005-77430
View Paper titled, Thermodynamic Effect on a Cavitating Inducer in Liquid Nitrogen
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Topics: Nitrogen, Cavitation, Cavities, Temperature, Blades, Bubbles, Flow (Dynamics), Pressure, Pumps, Visualization
Proceedings Papers

Cavitating Flow of Liquid Nitrogen in Horizontal Rectangular Nozzle

Jun Ishimoto, Masahiro Onishi, Takashi Tokumasu, Kenjiro Kamijo
Proc. ASME. IMECE2003, Process Industries, 95-104, November 15–21, 2003
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2003-41250
https://doi.org/10.1115/IMECE2003-41250
View Paper titled, Cavitating Flow of Liquid Nitrogen in Horizontal Rectangular Nozzle
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Topics: Flow (Dynamics), Nitrogen, Nozzles, Fluids, Cavitation, Ducts, Flow visualization, Transients (Dynamics), Two-phase flow
Journal Articles

Thermodynamic Effect on a Cavitating Inducer in Liquid Nitrogen

Yoshiki Yoshida, Kengo Kikuta, Satoshi Hasegawa, Mitsuru Shimagaki, Takashi Tokumasu
Journal: Journal of Fluids Engineering
Publisher: ASME
Article Type: Technical Papers
J. Fluids Eng. March 2007, 129(3): 273–278.
https://doi.org/10.1115/1.2427076
Published Online: October 26, 2006
View Article titled, Thermodynamic Effect on a Cavitating Inducer in Liquid Nitrogen
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Topics: Cavitation, Cavities, Nitrogen, Temperature, Water, Pressure, Blades