Numerical modelling of the one-dimensional diffusion by random walkers
Keywords:
diffusion, cellular automata, continuous macroscopic descriptionAbstract
In this paper we describe a numerical method of cellular automaton type to study the diffusion processes. The macroscopic diffusive behavior of a set of microscopic particles is obtained by the numerical simulation of particles motion as random walkers. We derive the averaging space-time scale needed for a macroscopical description of the diffusion process with a given precision. As an application we estimate the evacuation time by diffusion of a given number of particles from a fluid layer.
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Copyright (c) 2015 Journal of Numerical Analysis and Approximation Theory
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