多孔介质溶质运移边界层理论初探  

A PRELIMINARY STUDY OF BOUNDARY-LAYER THEORY OF SOLUTE TRANSI-ORT IN POROUS MATERIALS

作　　者：刘春平[1] 邵明安[2] 

机构地区：[1]湖南师范大学资环系,湖南长沙410006 [2]中国科学院水利部水土保持研究所,陕西杨凌712100

出　　处：《土壤学报》2001年第2期256-264,共9页Acta Pedologica Sinica

基　　金：国家自然科学基金强化项目(批准号:59879026)

摘　　要：研究了溶质运移边界层条件和边界层运动方程。采用一个小的运移通量脉冲定义边界层应满足的特征值。应用加Ｌａｐｌａｃｅ变换方法求解边界层问题的浓度解，并推导出边界层运动方程。边界层问题浓度解与精确解比较表明在计算浓度方面误差很小。边界层运动方程的一个重要应用是估算溶质运移参数。这个估算参数的新方法是应用边界层随时间运动的观测信息。这个方法简单，节省时间，并能充分利用边界层运动观测资料。The boundary layer condition and describing equation of boundary layer for solute transport are studied in this paper. A small flux is defined as the representive value of boundary layer. Laplace transister method is used to solve the concentration of boundary-layer problem (CSBL). The comperison of CSBL with the exact solution is conducted. Results show that the CSBL is in good agreement with the exact solution. An important application of the theory is the estimation of transport parameters of solute transporting through porous materials. This leads to a new method for the estimation of parameters by using the observation imformation of the advance of the boundary-layer with time. This new method is simple, saving time and can suffieiently utilize the observation data of boundary layer transport.

关 键 词：多孔介质 溶质运移 边界层理论 估计参数 土壤污染 

分 类 号：S153.5[农业科学—土壤学] X53[农业科学—农业基础科学]