Velocity Fluctuations in Electrostatically Driven Granular Media

Details Velocity Fluctuations in Electrostatically Driven Granular Media Velocity Fluctuations in Electrostatically Driven Granular Media

2001-10-29

arxiv.org/abs/cond-mat/0110607v2

Physics

Condensed Matter

Statistical Mechanics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevE.66.061302

We study experimentally the particle velocity fluctuations in an electrostatically driven dilute granular gas. The experimentally obtained velocity distribution functions have strong deviations from Maxwellian form in a wide range of parameters. We have found that the tails of the distribution functions are consistent with a stretched exponential law with typical exponents of the order 3/2. Molecular dynamic simulations shows qualitative agreement with experimental data. Our results suggest that this non-Gaussian behavior is typical for most inelastic gases with both short and long range interactions.

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