Non-Gaussian velocity distributions in excited granular matter in the absence of clustering

Details Non-Gaussian velocity distributions in excited granular matter in the absence of clustering Non-Gaussian velocity distributions in excited granular matter in the absence of clustering

2000-01-17

arxiv.org/abs/cond-mat/0001233v1

Phys. Rev. E 62, R1489 (2000)

Physics

Condensed Matter

Statistical Mechanics

4 pages, 5 figures. Additional information at http://physics.clarku.edu/~akudrolli/nls.html

Scientific paper

10.1103/PhysRevE.62.R1489

The velocity distribution of spheres rolling on a slightly tilted rectangular two dimensional surface is obtained by high speed imaging. The particles are excited by periodic forcing of one of the side walls. Our data suggests that strongly non-Gaussian velocity distributions can occur in dilute granular materials even in the absence of significant density correlations or clustering. When the surface on which the particles roll is tilted further to introduce stronger gravitation, the collision frequency with the driving wall increases and the velocity component distributions approach Gaussian distributions of different widths.

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