ROBUST NUMERICAL-METHODS FOR SATURATED-UNSATURATED FLOW WITH DRY INITIAL CONDITIONS IN HETEROGENEOUS MEDIA

被引：161

作者：

FORSYTH, PA

WU, YS

PRUESS, K

机构：

[1] Department of Computer Science, University of Waterloo, Waterloo

[2] HydroGeoLogic, Herndon

[3] Earth Sciences Division, Lawrence Berkeley Laboratory, University of California, Berkeley

来源：

ADVANCES IN WATER RESOURCES | 1995年 / 18卷 / 01期

关键词：

SATURATED UNSATURATED FLOW; DRY CONDITIONS; VARIABLE SUBSTITUTION; MONOTONICITY;

D O I：

10.1016/0309-1708(95)00020-J

中图分类号：

TV21 [水资源调查与水利规划];

学科分类号：

081501 ;

摘要：

A robust numerical method for saturated-unsaturated flow is developed which uses a monotone discretization and variable substitution. This method is compared to a conventional formulation and to a two phase (active air phase) model. On some published test examples of infiltration into dry media, the variable substitution method shows an order of magnitude improvement (in terms of nonlinear iterations) compared to the conventional pressure based method. One, two and three dimensional computations using both finite element and finite volume discretizations are presented.

引用

页码：25 / 38

页数：14

共 37 条

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