Commun. Comput. Phys., 9 (2011), pp. 1335-1346.


Gas Transport Properties in Gas Diffusion Layers: A Lattice Boltzmann Study

Toshihisa Munekata 1*, Takaji Inamuro 2, Shi-aki Hyodo 3

1 Materials Design Laboratory, Toyota Central R&D Labs., Inc., Nagakute, Aichi 480-1192, Japan; and Department of Aeronautics and Astronautics, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan.
2 Department of Aeronautics and Astronautics and Advanced Research Institute of Fluid Science and Engineering, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan.
3 Materials Design Laboratory, Toyota Central R&D Labs., Inc., Nagakute, Aichi 480-1192, Japan.

Received 30 October 2009; Accepted (in revised version) 16 December 2010
Available online 18 February 2011
doi:10.4208/cicp.301009.161210s

Abstract

The lattice Boltzmann method is applied to the investigations of the diffusivity and the permeability in the gas diffusion layer (GDL) of the polymer electrolyte fuel cell (PEFC). The effects of the configuration of water droplets, the porosity of the GDL, the viscosity ratio of water to air, and the surface wettability of the GDL are investigated. From the simulations under the PEFC operating conditions, it is found that the heterogeneous water network and the high porosity improve the diffusivity and the permeability, and the hydrophobic surface decreases the permeability.

AMS subject classifications: 76S05, 76R50, 76R05, 76M28

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Key words: Diffusivity, permeability, lattice Boltzmann method, gas diffusion layer.

*Corresponding author.
Email: munekata@mosk.tytlabs.co.jp (T. Munekata), inamuro@kuaero.kyoto-u.ac.jp (T. Inamuro), e0668@mosk.tytlabs.co.jp (S. Hyodo)
 

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