Length scales of convection-dispersion approaches to flow and transport in porous media

被引：16

作者：

Germann, Peter F. ^{[1
]}

机构：

[1] Department of Soils and Crops, Cook College/NJAES, Rutgers, The State University of New Jersey, P.O. Box 231, New Brunswick, NJ 08903, U.S.A.

来源：

Journal of Contaminant Hydrology | 1991年 / 7卷 / 1-2期

关键词：

Flow of Fluids - Transport Properties - Heat Transfer - Convection - Hydrodynamics - Diffusion - Soils - Moisture;

D O I：

10.1016/0169-7722(91)90037-2

中图分类号：

学科分类号：

摘要：

Two length scales of one-dimensional transient flow and transport in porous media are the width of hydrodynamic spread, ls. The macroscopic path length, lc, in the medium causing hydrodynamic dispersion has to exceed markedly both lm and ls if the parameters derived from the application of convection-dispersion equations should be of predictive value. The length scales are derived and discussed. Particular attention is given to the hydrodynamic dispersion of soil moisture and its potential energy.

引用

页码：39 / 49