Self-diffusion in granular gases: An impact of particles' roughness
Statistical Mechanics
2012-01-19 v2 Soft Condensed Matter
Abstract
An impact of particles' roughness on the self-diffusion coefficient in granular gases is investigated. For a simplified collision model where the normal and tangential restitution coefficients are assumed to be constant we develop an analytical theory for the diffusion coefficient, which takes into account non-Maxwellain form of the velocity-angular velocity distribution function. We perform molecular dynamics simulations for a gas in a homogeneous cooling state and study the dependence of the self-diffusion coefficient on restitution coefficients. Our theoretical results are in a good agreement with the simulation data.
Keywords
Cite
@article{arxiv.1201.3524,
title = {Self-diffusion in granular gases: An impact of particles' roughness},
author = {Anna Bodrova and Nikolai Brilliantov},
journal= {arXiv preprint arXiv:1201.3524},
year = {2012}
}