Two Phase Flow Simulation of Gas and Liquid in the Porous Structures and the Channels of PEM Fuel Cells

本研究开发了PEM燃料电池内两相流动的三维格子Boltzmann模拟程序。其目的是评估复杂的多孔结构中的气体和液体的行为，并提出最佳的单元结构。开发的程序阐明了气体扩散层的润湿性对冷凝水排放行为的影响。模拟还表明，分离器亲水肋板改善了气体扩散层的排水性能。

This study developed the three dimensional lattice Boltzmann simulation code of the two phase flow in a PEM fuel cell. The objective is to evaluate the gas and liquid behavior in the complicated porous structures and to present optimum cell structures. The developed code clarified the effects of wettability of gas diffusion layer on the drain behavior of condensed water. The simulation also indicated that hydrophilic ribs of separator improves the drainage performance of the gas diffusion layer.