Randomly driven granular fluids: Large-scale structure

Citation
Tpc. Van Noije et al., Randomly driven granular fluids: Large-scale structure, PHYS REV E, 59(4), 1999, pp. 4326-4341
Citations number
43
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW E
ISSN journal
1063651X → ACNP
Volume
59
Issue
4
Year of publication
1999
Pages
4326 - 4341
Database
ISI
SICI code
1063-651X(199904)59:4<4326:RDGFLS>2.0.ZU;2-7
Abstract
The nonequilibrium steady state of a granular fluid, driven by a random ext ernal force, is demonstrated to exhibit long-range correlations, which beha ve as similar to 1/r in three and similar to 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 si mulations. It is also shown by means of a mode coupling calculation, how th e mean field values for the steady-state temperature and collision frequenc y, as obtained from the Enskog-Boltzmann equation, are renormalized by long wavelength hydrodynamic fluctuations.