title: A fractional diffusion equation for a marker in porous media.
abstract: 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.
authors.affiliation: Centre de Physique Theorique, CNRS Luminy, Case 907, F-13288 Marseille, Cedex 9, France.
authors.forename: G.
authors.initials: G
authors.lastname: Erochenkova
authors.forename: R.
authors.initials: R
authors.lastname: Lima