Concentration gradient, diffusion, and flow through open porous medium near percolation threshold via computer simulations
Physics and Astronomy
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.
Pandey, R. B.,
(2001). Concentration gradient, diffusion, and flow through open porous medium near percolation threshold via computer simulations. PHYSICA A, 300(1-2), 1-12.
Available at: http://aquila.usm.edu/fac_pubs/3748