第一类边界条件下板状多孔物质中分子扩散型传质时升华问题的摄动解  

Perturbation Solution of Sublimation Problem of A Fick's Porous Slab under The First Boundary Condition

作　　者：彭仕文[1] 程尚模[1] 

机构地区：[1]华中理工大学

出　　处：《化工学报》1991年第2期231-235,共5页CIESC Journal

基　　金：国家自然科学基金资助项目

摘　　要：本文用摄动方法分析了板状多孔介质在第一类边界条件下Fick分子扩散传质时的升华干燥问题.基于对问题本质特征的分析,提出了运动界面处边界条件的处理的新方法,得到了无量纲形式的温度、浓度及运动界面位置的解析表达式.理论与实验结果的比较表明,摄动解比准稳态解更接近于实验结果.The heat and mass transfer in the sublimation problem of a Fick's porous slab under the first boundary condition was studied by the use of perturbation method. From a new treatment of the boundary conditions at the moving interface proposed by the authors, the analytical expressions of the dimension-less temperature, concentration and the position of moving interface could be developed. The pertur bation solution approached the experimental results better than the quasi-steady model.

关 键 词：冻结干燥 数学物理模型 

分 类 号：TQ028.63[化学工程]