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Effect of Gas Diffusion Layer Deformation on Liquid Water Transport in Proton Exchange Membrane Fuel Cell

机译:质子交换膜燃料电池气体扩散层变形对液态水传输的影响

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AbstractIn this study, a three-dimensional numerical model, based on the volume-of-fluid (VOF) method, was developed to investigate the water transport characteristics in the cathode of a proton exchange membrane fuel cell (PEMFC) taking into account the deformation of the gas diffusion layer (GDL). Simulations are carried out with different inlet flow rates, amount of liquid water in the GDL, positions of water droplet in the flow channel, and contact angles of the GDL and flow channel surfaces. Two mechanisms of liquid water droplet leaving the GDL are observed. One is driven by the surface tension when the gas flow rate is low, whereas the other is driven by the gas flow at high gas flow rates. Meanwhile, the deformation of the GDL and other factors highly influence the water droplet dynamics.
机译:摘要在这项研究中,建立了基于流体体积(VOF)方法的三维数值模型,以研究考虑了变形的质子交换膜燃料电池(PEMFC)阴极中的水传输特性。气体扩散层(GDL)的厚度。使用不同的入口流速,GDL中的液态水量,流道中水滴的位置以及GDL与流道表面的接触角进行模拟。观察到了水滴离开GDL的两种机理。当气体流速低时,一种由表面张力驱动,而另一种由高气体流速下的气流驱动。同时,GDL的变形和其他因素严重影响了水滴的动力学。

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