Improved pseudopotential lattice Boltzmann model for liquid water transport inside gas diffusion layers

Liquid water transport inside the gas diffusion layers (GDLs) plays a vital role in management of proton exchange membrane fuel cells (PEMFCs). In this study, an improved pseudopotential multiphase lattice Boltzmann model is firstly developed to realize actual density and viscosity ratios porous media. The proposed based on non-orthogonal multiple-relaxation-time (MRT) LB new wettability boundary condition. terms relationship between capillary pressure Pc saturation s, shows good agreement with experimental data. Using validated model, effects pressures contact angles mixed liquid invasion process for Toray-090 GDLs two Polytetrafluoroethylene (PTFE) contents (10 wt% 20 wt%) are studied. It found that fingering behaviors profiles along through-plane direction become more non-uniform increasing angle PTFE.