Title

Concentration gradient, diffusion, and flow through open porous medium near percolation threshold via computer simulations

Document Type

Article

Publication Date

11-1-2001

Department

Physics and Astronomy

Abstract

The interacting lattice gas model is used to simulate fluid flow through an open percolating porous medium with the fluid entering at the source-end and leaving from the opposite end. The shape of the steady-state concentration profile and therefore the gradient field depends on the porosity (p). The root mean square (rms) displacements of fluid and its constituents (tracers) show a drift power-law behavior, R proportional to t in the asymptotic regime (t --> infinity). The flux current density (j) is found to scale with the porosity according to, j proportional to (Deltap)(beta) with Deltap = p - p(c) and beta similar or equal to 1.7. (C) 2001 Published by Elsevier Science B.V.

Publication Title

PHYSICA A

Volume

300

Issue

1-2

First Page

1

Last Page

12