A novel method to determine effective thermal conductivity of porous materials  

作　　者：QIAN Jiyu LI Qiang YU Kai XUAN Yimin 

机构地区：[1]School of Power Engineering,Nanjing University of Science and Technology,Nanjing 210094,China

出　　处：《Science China(Technological Sciences)》2004年第6期716-724,共9页中国科学（技术科学英文版）

基　　金：the National Natural Science Foundation of China (Grant No. 50306007).

摘　　要：A 2D Lattice-Boltzmann (LB) model is proposed for analyzing the heat conduction process in the porous media. The effective thermal conductivities of several porous materials are calculated by means of this model. The calculated results are found to be in excellent agreement with the experimental data of the existing references. The factors affecting the effective thermal conductivity of porous materials are discussed. The results show that the effective thermal conductivity is strongly dependent upon the porosity and the pore structure and only has imperceptible dependence on the pore density. Then the correlation for estimating the effective thermal conductivity of the porous material is established. This LB model can be used conveniently to calculate and analyze the heat conduction problems of porous media or other materials with complex geometry boundary in pore scale. Keywords Lattice-Boltzann - porous media - effective thermal conductivity

关 键 词：Lattice-Boltzann porous media effective thermal conductivity 

分 类 号：TH[机械工程]