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Numerical simulation of liquid water and gas flow in a channel and a simplified gas diffusion layer model of polymer electrolyte membrane fuel cells using the lattice Boltzmann method

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Title: Numerical simulation of liquid water and gas flow in a channel and a simplified gas diffusion layer model of polymer electrolyte membrane fuel cells using the lattice Boltzmann method
Authors: Tabe, Yutaka Browse this author →KAKEN DB
Lee, Yongju Browse this author
Chikahisa, Takemi Browse this author →KAKEN DB
Kozakai, Masaya Browse this author
Keywords: PEM fuel cell
Lattice Boltzmann method
Two-phase flow
Large density difference
Gas diffusion layer
Wettability
Issue Date: 1-Aug-2009
Publisher: Elsevier B.V.
Journal Title: Journal of Power Sources
Volume: 193
Issue: 1
Start Page: 24
End Page: 31
Publisher DOI: 10.1016/j.jpowsour.2009.01.068
Abstract: Numerical simulations using the lattice Boltzmann method (LBM) are developed to elucidate the dynamic behavior of condensed water and gas flow in a polymer electrolyte membrane (PEM) fuel cell. Here, the calculation process of the LBM simulation is improved to extend the simulation to a porous medium like a gas diffusion layer (GDL), and a stable and reliable simulation of two-phase flow with large density differences in the porous medium is established. It is shown that dynamic capillary fingering can be simulated at low migration speeds of liquid water in a modified GDL. and the LBM simulation reported here, which considers the actual physical properties of the system, has significant advantages in evaluating phenomena affected by the interaction between liquid water and air flows. Two-phase flows with the interaction of the phases in the two-dimensional simulations are demonstrated. The simulation of water behavior in a gas flow channel with air flow and a simplified GDL shows that the wettability of the channel has a strong effect on the two-phase flow. The simulation of the porous separator also indicates the possibility of controlling two-phase distribution for better oxygen supply to the catalyst layer by gradient wettability design of the porous separator.
Type: article (author version)
URI: http://hdl.handle.net/2115/38964
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 田部 豊

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