Linear stability analysis of infiltration, analytical and numerical solution

被引：9
|
作者：
Ursino, N [1 ]
机构：
[1] ETH Zurich, Inst Terr Ecol Soil Phys, CH-8952 Schlieren, Switzerland
来源：
TRANSPORT IN POROUS MEDIA | 2000年 / 38卷 / 03期
关键词：
fingering; linear stability analysis; quasi-linear hypothesis; preferential flow;
D O I：
10.1023/A:1006688232755
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Linear stability analysis is applied to the Richards equation by perturbing the pressure field. An analytical solution of the stability problem of flow through stratified media is presented. It is obtained under two simplifying assumptions: the quasi-steady hypothesis and the quasi-linear hypothesis. Flow is found to be unconditionally stable. A numerical experiment and the comparison with published data supports the conclusion that upscaling capillary phenomena is crucial in order to capture the essence of finger flow by continuum models.
引用
收藏
页码：261 / 271
页数：11
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