Diffusion on two length scales
- 1 January 1981
- journal article
- letter
- Published by AIP Publishing in Physics of Fluids
- Vol. 24 (8) , 1584
- https://doi.org/10.1063/1.863575
Abstract
One‐dimensional diffusion is considered for a system in which the diffusion coefficient D has a rapid oscillation in the spatial variable as well as a slow variation. For long times, the distribution function evolves diffusively with an effective diffusion coefficient given by averaging 1/D.Keywords
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