Two-phase flow modeling for the cathode side of a polymer electrolyte fuel cell

► A two-phase flow model for the cathode side of a PEFC is presented. ► The gas channel (GC) is assumed to be a structured porous medium. ► Two-phase Darcys law is applied everywhere. ► The effect of immobile saturation (IS) in the diffusion layer (DL) is included. ► Neglecting the GC flooding leads to an overestimation the cell performance. ► Considering the IS leads to a higher liquid water saturation level in the DL.