Simulation of Oxygen and Water Mass Fraction in the Cathode for the PEM Fuel Cell

It is helpful to highlight the performance of PEM(Proton Exchange Membrane) fuel cell that understanding of mass fraction inside PEM fuel cell. It is simulation of species mass fraction in this paper. Model was set up by three conservation equations, and it was considered the Gravity in source item. The modeling domain consists of the membrane, two catalyst layers, two diffusion layers, and two channels. The results of simulation were accorded with experimental datum, and drawn six pictures. On analyzing of pictures, it got conclusion as follow: water mass fraction is increase along the flow channel and oxygen mass fraction is decrease along the flow channel. The comparison of mass fraction between cathode-upward and anode-upward when consider the effect of gravity: Oxygen mass fraction in cathode of fuel cell with cathode-upward is higher than that with anode-upward; Water mass fraction in cathode of fuel cell with anode-upward is higher than that with cathode-upward.