Dynamics of Freely Cooling Granular Gases

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dc.creatorNie, Xiaobo
dc.creatorBen-Naim, Eli
dc.creatorChen, Shiyi
dc.date2002-09-17
dc.date.accessioned2026-07-07T02:47:18Z
dc.date.available2026-07-07T02:47:18Z
dc.descriptionWe study dynamics of freely cooling granular gases in two-dimensions using large-scale molecular dynamics simulations. We find that for dilute systems the typical kinetic energy decays algebraically with time, E(t) ~ t^{-1}, in the long time limit. Asymptotically, velocity statistics are characterized by a universal Gaussian distribution, in contrast with the exponential high-energy tails characterizing the early homogeneous regime. We show that in the late clustering regime particles move coherently as typical local velocity fluctuations, Delta v, are small compared with the typical velocity, Delta v/v ~ t^{-1/4}. Furthermore, locally averaged shear modes dominate over acoustic modes. The small thermal velocity fluctuations suggest that the system can be heuristically described by Burgers-like equations.
dc.description4 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0209412
dc.identifierhttp://arxiv.org/abs/cond-mat/0209412
dc.identifierPhys. Rev. Lett. 89, 204301 (2002)
dc.identifierdoi:10.1103/PhysRevLett.89.204301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/19961
dc.subjectStatistical Mechanics
dc.subjectSoft Condensed Matter
dc.titleDynamics of Freely Cooling Granular Gases
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