Diffusion in Granular Gases of Viscoelastic Particles

Brilliantov NV, Pöschel T (2007)

Publication Type: Conference contribution

Publication year: 2007

Publisher: Springer

Series: Lecture Notes in Physics

City/Town: Berlin, Heidelberg

Book Volume: 557

Pages Range: 107-117

Conference Proceedings Title: Diffusion in Granular Gases of Viscoelastic Particles

ISBN: 9783540410744

DOI: 10.1007/3-540-45396-2_11

Abstract

In most of the literature on granular gases it is assumed that the restitution coefficient ∈, which quantifies the loss of kinetic energy upon a collision is independent on the impact velocity. Experiments as well as theoretical investigations show, however, that for real materials the restitution coefficient depends significantly on the impact velocity. We consider the diffusion process in a homogeneous granular gas, i.e. in a system of dissipatively colliding particles. We show that the mean square displacement of the particles changes drastically if we take the impact velocity dependence of e into account. Under the oversimplifying assumption of a constant coefficient one finds that the particles spread in space logarithmically slow with time, whereas realistic particles spread due to a power law.

Authors with CRIS profile

Thorsten Pöschel

Involved external institutions

Universität Stuttgart DE Germany (DE) Max-Planck-Institut für Kolloid- und Grenzflächenforschung / Max Planck Institute of Colloids and Interfaces DE Germany (DE)

How to cite

APA:

Brilliantov, N.V., & Pöschel, T. (2007). Diffusion in Granular Gases of Viscoelastic Particles. In Jan A. Freund, Thorsten Pöschel (Eds.), Diffusion in Granular Gases of Viscoelastic Particles (pp. 107-117). Berlin, Heidelberg: Springer.

MLA:

Brilliantov, Nikolai V, and Thorsten Pöschel. "Diffusion in Granular Gases of Viscoelastic Particles." Proceedings of the Diffusion in Granular Gases of Viscoelastic Particles Ed. Jan A. Freund, Thorsten Pöschel, Berlin, Heidelberg: Springer, 2007. 107-117.

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