Diffusion in disordered media

1987/01/01 by Shlomo Havlin, Daniel Ben-Avraham, Daniel ben‐Avraham · 37 citations
Physics and Astronomy · Materials Science · Mathematics · #Theoretical and Computational Physics #Material Dynamics and Properties #Stochastic processes and statistical mechanics

paper · doi:10.1080/00018738700101072

Abstract

Abstract Diffusion in disordered systems does not follow the classical laws which describe transport in ordered crystalline media, and this leads to many anomalous physical properties. Since the application of percolation theory, the main advances in the understanding of these processes have come from fractal theory. Scaling theories and numerical simulations are important tools to describe diffusion processes (random walks: the ‘ant in the labyrinth’) on percolation systems and fractals. Different types of disordered systems exhibiting anomalous diffusion are presented (the incipient infinite percolation cluster, diffusion-limited aggregation clusters, lattice animals, and random combs), and scaling theories as well as numerical simulations of greater sophistication are described. Also, diffusion in the presence of singular distributions of transition rates is discussed and related to anomalous diffusion on disordered structures.

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