Authors
Albert Compte, Ralf Metzler
Publication date
1997/11/7
Journal
Journal of Physics A: Mathematical and General
Volume
30
Issue
21
Pages
7277
Publisher
IOP Publishing
Description
The Cattaneo equation, which describes a diffusion process with a finite velocity of propagation, is generalized to describe anomalous transport. Three possible generalizations are proposed, each one supported by a different scheme: continuous time random walks, non-local transport theory, and delayed flux-force relation. The properties of these generalizations are studied in both the long-time and the short-time regimes. In the long-time limit, we recover the mean-square displacement which is characteristic for these anomalous processes. As expected, the short-time behaviour is modified in comparison to generalized diffusion equations.
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