Random walks and anomalous diffusion in two-component random media.
The diffusion process in a random media consisting of two different components is studied by a random walk model. The latter is described by three parameters, namely, the fraction p of components, the ratio h of the diffusion coefficients in two components, and the parameter x defining a walker's jumps at the boundary. Depending on the values of these parameters the diffusion can be confined, normal, or anomalous (subdiffusion). The subdiffusion occurs, in particular, for h=0 (trapping model) and for x=0 (excluded volume model).
Arinstein
A E
AE
Department of Physics, Bar-Ilan University, Ramat-Gan 42900, Israel.
Gitterman
M
M
D000465:Algorithms; D045424:Complex Mixtures / Q000032:analysis / Q000737:chemistry*; D003198:Computer Simulation; D004058:Diffusion; D008954:Models, Biological; D008956:Models, Chemical; D015233:Models, Statistical; D016138:Walking
D045424:Complex Mixtures