Granular Gases - the early stage

Details Granular Gases - the early stage Granular Gases - the early stage

2002-03-20

arxiv.org/abs/cond-mat/0203401v1

In: D. Reguera, L.L. Bonilla, M. Rubi (Eds.): Coherent Structures in Complex Systems, Lecture Notes in Physics, Springer (2001

Physics

Condensed Matter

Statistical Mechanics

12 pages, 3 figures

Scientific paper

We investigate the evolution of the velocity distribution function of a granular gas composed of viscoelastic particles in the homogeneous cooling state, i.e. before clustering occurs. The deviation of the velocity distribution function from the Maxwellian distribution is quantified by a Sonine polynomials expansion. The first non-vanishing Sonine coefficient a_2(t), reveals a complex time dependence which allows to assign the granular gas the property of an age. We discuss the possibility to measure the age of a granular gas.

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