Velocity distributions in dissipative granular gases

Details Velocity distributions in dissipative granular gases Velocity distributions in dissipative granular gases

2003-07-25

arxiv.org/abs/cond-mat/0307644v2

Physics

Condensed Matter

Soft Condensed Matter

5 figures

Scientific paper

10.1103/PhysRevLett.93.038001

Motivated by recent experiments reporting non-Gaussian velocity distributions in driven dilute granular materials, we study by numerical simulation the properties of 2D inelastic gases. We find theoretically that the form of the observed velocity distribution is governed primarily by the coefficient of restitution $\eta$ and $q=N_H/N_C$, the ratio between the average number of heatings and the average number of collisions in the gas. The differences in distributions we find between uniform and boundary heating can then be understood as different limits of $q$, for $q \gg 1$ and $q \lesssim 1$ respectively.

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