Thermalization of an anisotropic granular particle

Details Thermalization of an anisotropic granular particle Thermalization of an anisotropic granular particle

2003-11-11

arxiv.org/abs/cond-mat/0311255v2

Physics

Condensed Matter

Statistical Mechanics

7 pages, 6 Figures, submitted to PRE. Revised version (Fig1, Fig5 and Fig6 corrected + minor typos)

Scientific paper

10.1103/PhysRevE.69.051106

We investigate the dynamics of a needle in a two-dimensional bath composed of thermalized point particles. Collisions between the needle and points are inelastic and characterized by a normal restitution coefficient $\alpha<1$. By using the Enskog-Boltzmann equation, we obtain analytical expressions for the translational and rotational granular temperatures of the needle and show that these are, in general, different from the bath temperature. The translational temperature always exceeds the rotational one, though the difference decreases with increasing moment of inertia. The predictions of the theory are in very good agreement with numerical simulations of the model.

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