Self-diffusion in granular gases

Details Self-diffusion in granular gases Self-diffusion in granular gases

1998-03-31

arxiv.org/abs/cond-mat/9803387v2

Phys. Rev. E, Vol. 61, 1716 (2000)

Physics

Condensed Matter

Statistical Mechanics

6 pages, no figures

Scientific paper

10.1103/PhysRevE.61.1716

The coefficient of self-diffusion for a homogeneously cooling granular gas changes significantly if the impact-velocity dependence of the restitution coefficient $\epsilon$ is taken into account. For the case of a constant $\epsilon$ the particles spread logarithmically slow with time, whereas the velocity dependent coefficient yields a power law time-dependence. The impact of the difference in these time dependences on the properties of a freely cooling granular gas is discussed.

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