Numerical solution for a non-Fickian diffusion in a periodic potential

Details Numerical solution for a non-Fickian diffusion in a periodic potential Numerical solution for a non-Fickian diffusion in a periodic potential

2011-09-11

arxiv.org/abs/1109.2344v1

Physics

Computational Physics

Scientific paper

Numerical solutions of a non-Fickian diffusion equation belonging to a hyperbolic type are presented in one space dimension. The Brownian particle modelled by this diffusion equation is subjected to a symmetric periodic potential whose spatial shape can be varied by a single parameter. We consider a numerical method which consists of applying Laplace transform in time; we then obtain an elliptic diffusion equation which is discretized using a finite difference method. We analyze some aspects of the convergence of the method. Numerical results for particle density, flux and mean-square-displacement (covering both inertial and diffusive regimes) are presented.

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