The effect of image resolution on gas permeability through the x-ray reconstructed carbon paper gas diffusion layer (GDL) of a polymer electrolyte fuel cell (PEFC) was examined in this paper. The 3D models of the GDL at 6 different resolutions were obtained by the x-ray computed tomography imaging technique. Each GDL image was then characterized its gas permeability through the lattice Boltzmann (LB) numerical method. The results suggest that the image resolution has a great impact on gas permeability in both principal and off-principal flow directions. The coarser resolutions can contribute to significant changes in the resulting permeability. However, it can reduce calculation time to a great extent. The results also indicate that the GDL image at the resolution of 2.72 m provides a good compromise between computation time and accuracy.
History
School
Aeronautical, Automotive, Chemical and Materials Engineering
Department
Aeronautical and Automotive Engineering
Published in
13TH INTERNATIONAL CONFERENCE ON ADVANCED BATTERIES, ACCUMULATORS AND FUEL CELLS (ABAF 2012)
Volume
48
Issue
1
Pages
93 - 101 (9)
Citation
JINUNTUYA, F. ... et al., 2014. The impacts of image resolution on permeability simulation of gas diffusion layer using lattice Boltzmann method. ECS Transactions, 48(1), pp.93-101.
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