Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2004-11-09
Rarefied Gas Dynamics: 24th International Symposium on Rarefied Gas Dynamics, M. Capitelli, ed. (AIP Conference Proceedings, 2
Physics
Condensed Matter
Statistical Mechanics
6 pages, 4 figures; to appear in Rarefied Gas Dynamics: 24th International Symposium (AIP Conference Proceedings)
Scientific paper
10.1063/1.1941632
A method based on the simple shear flow modified by the introduction of a deterministic non-conservative force and a stochastic process is proposed to measure the Navier-Stokes shear viscosity in a granular fluid described by the Enskog equation. The method is implemented in DSMC simulations for a wide range of values of dissipation and density. It is observed that, after a certain transient period, the system reaches a hydrodynamic stage which tends to the Navier-Stokes regime for long times. The results are compared with theoretical predictions obtained from the Chapman-Enskog method in the leading Sonine approximation, showing quite a good agreement, even for strong dissipation.
Garzo Vicente
Montanero Jose M.
Santos Andrés
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