The controls of the physical variables on different cross sections provide insights into the multiphysical processes within PEMFC layers. The performance of PEMFC is improved upon an increase in the inlet temperature, system pressure or flow rate, which is precisely captured by the CFD fuel cell model. Moreover, the concentration polarization caused by the insufficient supply of fuel gas can be also simulated as a high-temperature PEMFC is operated at a higher current density. These characteristics include the fuel gas distribution, temperature variation, liquid water saturation distribution, and membrane conductivity