非饱和土水气两相渗流有限元数值模型

Finite element modeling of twophase seepage in unsaturated soil

根据非饱和土水气两相渗流理论,用Galerkin法建立了用以计算非饱和土水气两相渗流流场的有限元计算模型,编制了三维有限元计算程序,并介绍了该计算模型在可挥发污染物抽气曝气组合清除法中的应用。

On basis of the twophase seepage theory in unsaturated soil, a computational model, which can be used to calculate the twophase flows of compressible air and incompressible water in porous media, is proposed using the Galerkin finite element technique. A new threedimensional program is developed. The program is verified by applying it to an example of insitu air sparging and soil vapor extraction facility to remedy sites contaminated by volatile hydrocarbons.