摘要
实验发现,微电子器械系统中的流体力学行为与其对应的宏观规律并不相同。该文基于计算流体力学软件-F luent,结合传统燃料电池数学理论,以微型质子交换膜燃料电池(μPEMFC)为研究对象,运用微尺度流体力学,建立了电池的阴极数学模型。该模型根据动量守恒、质量守恒、能量守恒以及电化学、微米/纳米尺度流体力学,分析了阴极扩散层中氧气的摩尔分数分布以及催化层中氧气的反应速率,并与传统燃料电池模型进行了比较,指出了微型燃料电池的特殊性。
It is the micro machinery system that shows different fluidic characters with its traditional macroscopical rules. Based on CFD software - Fluent, a cathode mathematical model of μPEMFC is introduced according to the traditional fuel cells＇ theories and the micro fluids. With momentum conservation, mass conservation, energy conservation, electrochemistry and micro/nano fluidics, the O2 mole fraction distribution in the diffuser and the reaction rate in the catalyst layer are studied. The characteristics of micro fuel cells are analyzed after the comparison with the traditional fuel cells.
出处
《计算机仿真》
CSCD
2006年第8期204-206,共3页
Computer Simulation
