Self-diffusion in granular gases: An impact of particles' roughness

Anna Bodrova, Nikolai Brilliantov

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

An impact of particles' roughness on the selfdiffusion coefficient D in granular gases is investigated. For a simplified collision model where the normal, ε, and tangential, β, 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 selfdiffusion coefficient on ε and β. Our theoretical results are in a good agreement with the simulation data.

Original languageEnglish
Pages (from-to)85-90
Number of pages6
JournalGranular Matter
Volume14
Issue number2
DOIs
Publication statusPublished - Apr 2012
Externally publishedYes

Keywords

  • Granular gases
  • Rough particles
  • Self-diffusion

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