Impact of high-energy tails on granular gas properties

Abstract

The velocity distribution function of granular gases in the homogeneous cooling state as well as some heated granular gases decays for large velocities as $f\propto \exp (-const.v)$. That is, its high-energy tail is overpopulated as compared with the Maxwell distribution. At the present time, there is no theory to describe the influence of the tail on the kinetic characteristics of granular gases. We develop an approach to quantify the overpopulated tail and analyze its impact on granular gas properties, in particular on the cooling coefficient. We observe and explain anomalously slow relaxation of the velocity distribution function to its steady state.

5 pages, 5 figures

Cited by in corpus (8)

• Velocity distribution of a homogeneously driven two-dimensional granular gas
• Universal velocity distributions in an experimental granular fluid
• Velocity Distribution of a Homogeneously Cooling Granular Gas
• Partitioning of energy in highly polydisperse granular gases
• High-energy velocity tails in uniformly heated granular materials
• Granular Gas Cooling and Relaxation to the Steady State in Regard to the Overpopulated Tail of the Velocity Distribution
• A note on the violation of the Einstein relation in a driven moderately dense granular gas
• Translational and rotational non-Gaussianities in homogeneous freely evolving granular gases