Micro-Transport Phenomena of Heat and Mass Transfer in Porous Media

为了研究燃料电池多孔介质表面的传热传质，我们对多孔介质中的流体流动和传热传质进行了实验和数值研究，得到了以下结果：用激光多普勒测速仪测量了多孔介质的孔内流动速度，得到了多孔介质的孔内流动与表面流动的关系。将晶格玻尔兹曼方法应用于不同孔隙率的多孔介质中流动和传热的模拟，发现了孔隙率对流动和传热的影响。用电化学方法测定了流体与多孔介质之间的传质系数。采用晶格玻尔兹曼法对多孔介质中的传热传质进行了数值模拟，得到了多孔介质的局部传热传质系数。

In order to study the heat and mass transfer at the surface of porous media for fuel cell, we investigated experimentally and numerically fluid flow and heat and mass transfer in porous media and obtained the following results :1.The flow velocities in pore of porous media are measured by the laser Doppler velocimeter and the relation between the flow in the porous media and the flow along the surface is found.2.The lattice Boltzmann method is applied to simulations of flow and heat transfer in porous media with various porosity and the effect of the porosity on the flow and heat transfer is found.3.The mass transfer coefficients between the fluid and the porous media are measured by the electrochemical method.4.The lattice Boltzmann method is used for simulations of heat and mass transfer in porous media and the local heat and mass transfer coefficients are obtained.