A fractional diffusion equation for a marker in porous media.
To study the properties of the flow of a marker through an irregular packed bed, porosity is described by stochastic processes with exponentially decaying correlation functions. We show that the ensemble average concentration of the marker satisfies a fractional diffusion equation. (c) 2001 American Institute of Physics.
Erochenkova
G.
G
Centre de Physique Theorique, CNRS Luminy, Case 907, F-13288 Marseille, Cedex 9, France.
Lima
R.
R