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Randomly Driven Granular Fluids: large scale structure | | T.P.C. van Noije
; M.H. Ernst
; E. Trizac
; I. Pagonabarraga
; | | Date: |
20 Oct 1998 | | Journal: | Phys. Rev. E 59, 4326 (1999). | | Subject: | Statistical Mechanics | cond-mat.stat-mech | | Affiliation: | Universiteit Utrecht), E. Trizac, I. Pagonabarraga (AMOLF, Amsterdam | | Abstract: | The nonequilibrium steady state of a granular fluid, driven by a random external force, is demonstrated to exhibit long range correlations, which behave as $sim 1/r$ in three and $sim ln(L/r)$ in two dimensions. We calculate the corresponding structure factors over the whole range of wave numbers, and find good agreement with two-dimensional molecular dynamics simulations. It is also shown by means of a mode coupling calculation, how the mean field values for the steady state temperature and collision frequency, as obtained from the Enskog-Boltzmann equation, are renormalized by long wavelength hydrodynamic fluctuations. | | Source: | arXiv, cond-mat/9810251 | | Services: | Forum | Review | PDF | Favorites | |
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