含湿毛细多孔介质干燥过程相变传热传质分析  

ANALYSIS ON HEAT AND MASS TRANSFER WITH PHASE CHANGE IN WET 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,辽宁大连116024

出　　处：《工程热物理学报》2003年第1期100-102,共3页Journal of Engineering Thermophysics

基　　金：辽宁省科学技术基金资助项目(No.9522055)

摘　　要：分析了含湿毛细多孔介质干燥过程的主要机理,建立了以液相饱和度、温度和气体压力为参数的一维数学模型, 采用全隐式有限差分方法对该模型进行了数值计算。计算结果表明,干燥过程可分为两个阶段:不稳定阶段和稳定阶段。 在不稳定阶段,模拟参数变化剧烈,而在稳定阶段,模拟参数变化平稳。The primary mechanisms affecting drying process of wet capillary porous media were analyzed and a one-dimension model was established to predict the variations of saturation, temperature, and gas pressure in porous media during drying. The numerical technique was employed to solve the one-dimensional model with implicit finite difference method. Numerical results present that the drying process could be divided into two periods: unstable and stable. The simulation parameters change acutely in unstable period but they change smoothly in stable one.

关 键 词：多孔介质 相变 干燥 传热传质 

分 类 号：TK124[动力工程及工程热物理—工程热物理]