含湿毛细多孔介质湿区相变传热传质干燥三方程模型  

A THREE-EQUATION MODEL FOR HEAT AND MASS TRANSFER WITH PHASE CHANGE IN WET REGION OF CAPILLARY POROUS MEDIA DURING DRYING

作　　者：卢涛[1] 沈胜强[1] 葛玉林[1] 

机构地区：[1]大连理工大学动力工程系,大连116024

出　　处：《太阳能学报》2003年第5期644-648,共5页Acta Energiae Solaris Sinica

摘　　要：含湿毛细多孔介质的干燥过程是复杂的相变传热传质过程。该过程涉及渗流、扩散、传热、毛细效应和相变等机理,建立了含湿毛细多孔介质湿区干燥过程相变传热传质数学模型,采用全隐式有限差分方法对一维模型进行了数值计算。得到了含湿毛细多孔介质湿区干燥过程中的液相饱和度、温度和混合气体压力的变化,并分析了该计算结果。A Three^equation model is established to describe the drying process of a wet capillary porous media,which is a complicated process of heat and mass transfer with phase change supported by various theories such as osmosis,diffusion,heat transfer,capillary and phase change. This article demonstrates a model of three non^linear coupled partial differential equations,which predict the variation of saturation,temperature,and mixture gas pressure in wet region during drying.The numerical solution technique employed to solve the one^dimension model is the fully implicit time finite difference.The changes of three parameters were simulated and the numerical results were analyzed.

关 键 词：多孔介质 干燥 传热传质 

分 类 号：TK512.4[动力工程及工程热物理—热能工程]