Velocity Distributions & Density Fluctuations in a 2D Granular Gas

Details Velocity Distributions & Density Fluctuations in a 2D Granular Gas Velocity Distributions & Density Fluctuations in a 2D Granular Gas

1999-05-12

arxiv.org/abs/cond-mat/9905173v2

Physics

Condensed Matter

Soft Condensed Matter

Corrected mistake in legend of Figure 3. 10 pages revtex, 6 figures, submitted to Phys Rev E

Scientific paper

10.1103/PhysRevE.60.R2468

Velocity distributions in a vibrated granular monolayer are investigated experimentally. Non-Gaussian velocity distributions are observed at low vibration amplitudes but cross over smoothly to Gaussian distributions as the amplitude is increased. Cross-correlations between fluctuations in density and temperature are present only when the velocity distributions are strongly non-Gaussian. Confining the expansion of the granular layer results in non-Gaussian velocity distributions that persist to high vibration amplitudes.

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