A transient

three-dimensional

non-isothermal and two-phase mathematical model based on computation fluid dynamics was developed to describe the dynamic process of PEMFC.The developed model was used to simulate a serpentine flow field PEMFC

and the dynamic characteristic parameters such as membrane surface temperature at cathode side and current density during the start-up process of fuel cell were computed.The dynamic response of fuel cell characteristics after step change of cathode inlet velocity

humidity and cell voltage was analyzed.It was found that the start-up and step response time of PEM fuel cell was in the order of seconds

which was similar to the simulation results of most presently used models.