منابع مشابه
Solute Transport in Heterogeneous Porous Media
Solute mass transport in porous media is strongly correlated with pore fluid flow. The analysis of solute transport is an effective means for studying medium heterogeneities. In this study, we discuss the effects of heterogeneity on the tracer transport. Assuming steady fluid flow, we have simulated tracer transport in various permeability heterogeneities. The results show that the tracer distr...
متن کاملEffective Macrodiffusion in Solute Transport through Heterogeneous Porous Media
Homogenization method is used to analyse the equivalent behavior of transient flow of a passive solute through highly heterogeneous porous media. The flow is governed by a coupled system which includes an elliptic equation and a linear convection-diffusion concentration equation with a diffusion term small with respect to the convection, i.e. a high Peclet number is considered. Asymptotic expan...
متن کاملStochastic analysis of solute transport in heterogeneous, dual-permeability media
[1] A Eulerian perturbation method is applied to study the influence of medium heterogeneity on nonreactive chemical transport in a saturated, fractured porous medium under steady state flow conditions. A dual-permeability model is used to describe the flow and solute transport in the fractured medium [Gerke and van Genuchten, 1993a, 1993b]. The model involves two overlaying continua at the mac...
متن کاملNonergodic solute transport in three-dimensional heterogeneous isotropic aquifers
The general expressions for the time-dependent ensemble averages of the second spatial moments ^A& and the effective dispersivities g, defined as (1/ 2m)(d^A&/dt) where m is the magnitude of the mean flow velocity m, are evaluated in order to study the effect of initial plume size on ^A& and g in three-dimensional heterogeneous isotropic aquifers under the first-order approximation to the parti...
متن کاملInverse Estimation of Soil Hydraulic and Solute Transport Parameters from Transient Field Experiments: Heterogeneous Soil
While inverse parameter estimation techniques for determining key parameters affecting water flow and solute transport are becoming increasingly common in saturated and unsaturated zone studies, their application to practical problems, such as irrigation, have received relatively little attention. In this article, we used the Levenberg–Marquardt optimization algorithm in combination with the HY...
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ژورنال
عنوان ژورنال: Journal of Hydrologic Engineering
سال: 1999
ISSN: 1084-0699,1943-5584
DOI: 10.1061/(asce)1084-0699(1999)4:3(293)