Non-Gaussian Velocity Distribution Function in a Vibrating Granular Bed

Details Non-Gaussian Velocity Distribution Function in a Vibrating Granular Bed Non-Gaussian Velocity Distribution Function in a Vibrating Granular Bed

2004-04-27

arxiv.org/abs/cond-mat/0404633v3

Physics

Condensed Matter

Statistical Mechanics

4 pages, 4 figures. to be published in Journal of Physical Society of Japan Vol.73 No.8

Scientific paper

10.1143/JPSJ.73.2037

The simulation of granular particles in a quasi two-dimensional container under the vertical vibration as an experimental accessible model for granular gases is performed. The velocity distribution function obeys an exponential-like function during the vibration and deviates from the exponential function in free-cooling states. It is confirmed that this exponential-like distribution function is produced by Coulomb's friction force. A Langevin equation with Coulomb's friction is proposed to describe the motion of such the system.

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