多孔介质热导率的数值计算  

NUMERICAL STUDY ON EFFECTIVE THERMAL CONDUCTIVITY OF POROUS MEDIA

作　　者：李小川[1] 施明恒[1] 

机构地区：[1]东南大学能源与环境学院,江苏南京210096

出　　处：《工程热物理学报》2008年第2期291-293,共3页Journal of Engineering Thermophysics

基　　金：高等学校博士点基金(No.20040286029)

摘　　要：通过数值模拟得出面积分形维数和孔隙率相同,而孔隙结构不同的分形多孔介质的导热特性是不相同的.说明仅仅依靠孔隙率和分形维数两个参数无法有效确定多孔介质的热物理性质,寻找新的表征孔隙结构的参数是必要的.同时也说明了前人所得出的关于多孔介质的热物性的解析表达式具有一定的局限性和不确定性.Results of numerical simulation show that thermal characteristics of fractal porous media which have the same area fractal dimension and porosity, different porous structure are different. Thermal properties of fractal porous media can not be decided by single two parameters： porosity and fractal dimension. It is necessary to find new parameters to describe the structure of porous media. It also shows that some analytical expressions obtained by former scholars are limited and indefinite.

关 键 词：多孔介质 导热 SIERPINSKI地毯 分形 

分 类 号：TK124.1[动力工程及工程热物理—工程热物理]