Mesoscopic Theory of Granular Fluids

Details Mesoscopic Theory of Granular Fluids Mesoscopic Theory of Granular Fluids

1997-06-09

arxiv.org/abs/cond-mat/9706079v1

Phys. Rev. Lett. 79, 411 1997

Physics

Condensed Matter

Statistical Mechanics

4 pages with 3 figures, Latex. To be published in Phys.Rev.Lett

Scientific paper

10.1103/PhysRevLett.79.411

Using fluctuating hydrodynamics we describe the slow build-up of long range spatial correlations in a freely evolving fluid of inelastic hard spheres. In the incompressible limit, the behavior of spatial velocity correlations (including $r^{-d}$-behavior) is governed by vorticity fluctuations only and agrees well with two-dimensional simulations up to 50 to 100 collisions per particle. The incompressibility assumption breaks down beyond a distance that diverges in the elastic limit.

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