Abstract:：How to enhance liquid water transport or removal in gas diffusion layers and gas flow channels is an important problem needs to be carefully considered in the research and design of advanced H2/Air PEMFC (proton exchange membrane fuel cell). In the present work, the FLUENT volume of fluid (VOF) module is employed to simulate and study the dynamic behavior of liquid water droplet formation, detachment and transportation on or from the surface of gas diffusion layer. Water droplets show complex dynamic behavior, which is a result of the combined effect of shearing forces, viscous forces and surface tension. Water droplet detaches from the surface of gas diffusion layer more easily if the contact angle is larger or the gas flow velocity is higher. The effect of contact angle on water droplet dynamic behavior is greater than the gas velocity. A downstream notch on the surface of gas diffusion layer can facilitate the detachment of water droplet. In addition, water droplet dynamic behavior on the anode side is studied as well. It is found that once water droplet forms on the surface of gas diffusion layer, it more possibly sticks on the surface and is hard to be blown away by the H2 flow.
中文标题：H2空气质子交换膜燃料电池气体扩散层表面水滴行为的VOF模拟研究
英文标题：Dynamic Behaviors of Water Droplets on H2/Air PEMFC Gas Diffusion Layer Surface: VOF Simulations
发表时间：2017-08-24
