%0 Conference Paper %A Jinuntuya, Fontip %A Chen, Rui %A Ostadi, Hossein %A Jiang, Kyle %A Gao, Yuan %A Zhang, Xiaoxian %D 2014 %T The impacts of image resolution on permeability simulation of gas diffusion layer using lattice Boltzmann method %U https://repository.lboro.ac.uk/articles/conference_contribution/The_impacts_of_image_resolution_on_permeability_simulation_of_gas_diffusion_layer_using_lattice_Boltzmann_method/9221951 %2 https://repository.lboro.ac.uk/ndownloader/files/16801235 %K Lattice Boltzmann method %K X-ray tomography %K Gas diffusion layer %K Engineering not elsewhere classified %X 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) is examined in this paper. The 3D models of the GDL at six different resolutions are obtained by the x-ray tomography imaging technique. Each GDL image is 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 computational time to a great extent. The results also indicate that the GDL image at the resolution of 2.72 μm provides a good compromise between computational time and accuracy. %I Loughborough University