Self-diffusion in granular gases

Abstract

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.

6 pages, no figures

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• Diffusion of impurities in a granular gas
• Diffusion in a Granular Fluid - Theory
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• Models of fluidized granular materials: examples of non-equilibrium stationary states
• Kinetic Integrals in the Kinetic Theory of dissipative gases
• Energy and number of collisions fluctuations in inelastic gases
• Uniform self-diffusion in a granular gas
• Blow up Analysis for Anomalous Granular Gases
• Anomalous diffusion of scaled Brownian tracers
• Underdamped scaled Brownian motion: (non-)existence of the overdamped limit in anomalous diffusion
• Asymptotic Analysis of the Green-Kubo Formula