Investigation into the formation and transport of liquid water in proton exchange membrane fuel cells (PEMFCs) is the key to fuel cell water management. A three-dimensional gas/liquid two-phase flow and heat transfer model is developed based on the multiphase mixture theory. The reactant gas flow, diffusion, and chemical reaction as well as the liquid water transport and phase change process are modeled. Numerical simulations on liquid water distribution and its effects on the performance of a PEMFC are conducted. Results show that liquid water distributes mostly in the cathode, and predicted cell performance decreases quickly at high current density due to the obstruction of liquid water to oxygen diffusion. The simulation results agree well with experimental data.
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Zhuge, W., Zhang, Y., Ming, P. et al. Numerical simulation of three-dimensional gas/liquid two-phase flow in a proton exchange membrane fuel cell. Front. Energy Power Eng. China 1, 305–310 (2007). https://doi.org/10.1007/s11708-007-0044-4
- water management
- two-phase flow
- numerical simulation