Effect of fiber orientation on Liquid–Gas flow in the gas diffusion layer of a polymer electrolyte membrane fuel cell |
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Affiliation: | 1. Dept. of Mechanical and Aerospace Engineering, Seoul Nat''l Univ., Seoul, 08826, Republic of Korea;2. School of Automotive, Industrial, and Mechanical Engineering, Daegu Univ., Gyungsan, 38453, Republic of Korea;3. Graduate School of Engineering Practice and Dept. of Mechanical Engineering, Seoul Nat''l Univ., Seoul, 08826, Republic of Korea;4. Division of Mechanical System Engineering, Kyonggi Univ., Suwon, 16227, Republic of Korea |
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Abstract: | In this study, the lattice Boltzmann method was used to simulate the three-dimensional intrusion process of liquid water in the gas diffusion layer (GDL) of a polymer electrolyte membrane fuel cell (PEMFC). The GDL was reconstructed by the stochastic method and used to investigate fiber orientation's influence on liquid water transport in the GDL of a PEMFC. The fiber orientation can be described by the angle between a single fiber and the in-plane direction; three different samples were simulated for three different fiber orientation ranges. The simulated permeability correlated well with the anisotropic characteristics of reconstructed carbon papers. It was concluded that the fiber orientation had a significant effect on the liquid invasion pattern in the GDL by changing the pore shape and distribution of the GDL. The results indicated that the stochastically reconstructed GDL, taking into account the fiber orientation, better demonstrates the mass transport properties of the GDL. |
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Keywords: | Polymer electrolyte membrane fuel cell Gas diffusion layer Lattice Boltzmann method Liquid water transport Fiber orientation |
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