Numerical simulation of an unsaturated flow equation  

作　　者：谢正辉 曾庆存 戴永久 王斌 

出　　处：《Science China Earth Sciences》1998年第4期429-436,共8页中国科学（地球科学英文版）

基　　金：theNationalKeyProjectofFundamentalResearch"ClimateDynamicsandClimatePredictionTheory"andChinaPostdoctoralScienceFoundation

摘　　要：A numerical model for an unsaturated flow problem by using the finite element method is established in order to simulate liquid moisture flow in an unsaturated zone with homogeneous soil and deep subsurface water, and with different initial and boundary conditions. For infiltration or evaporation problems, a traditional method usually yields oscillatory non-physics profiles. However, nonoscillatory solutions are obtained and non-physics solutions for these problems are evaded by using the mass-lumped finite element method. Moreover, the kind of boundary condition is handled very well.A numerical model for an unsaturated flow problem by using the finite element method is established in order to simulate liquid moisture flow In an unsaturated zone with homogeneous soil and deep subsurface water, and with different initial and boundary conditions. For infiltration or evaporation problems, a traditional method usually yields oscillatory non-physics profiles. However, nonoscillatory solutions are obtained and non-physics solutions for these problems are evaded by using the mass-lumped finite element method. Moreover, the kind of boundary condition is handled very well.

关 键 词：UNSATURATED flow FINITE ELEMENT MASS LUMPING NUMERICAL simulation. 

分 类 号：P433[天文地球—大气科学及气象学]