Fluctuating hydrodynamics for dilute granular gases: a Monte Carlo study
Soft Condensed Matter
2010-09-27 v1
Abstract
We investigate hydrodynamic noise in a dilute granular gas during the homogeneous cooling state, by means of a proper application of the Direct Simulation Monte Carlo (DSMC) algorithm. The DSMC includes a source of randomization which is not present in Molecular Dynamics (MD) for inelastic hard disks. Notwithstanding this difference, a fair quantitative agreement is found, including a violation of the fluctuation-dissipation relation for the noise amplitude of the same order observed in MD. This study suggests that deterministic collision dynamics is not an essential ingredient to reproduce, up to a good degree of approximation, hydrodynamic fluctuations in dilute granular gases.
Cite
@article{arxiv.1005.4108,
title = {Fluctuating hydrodynamics for dilute granular gases: a Monte Carlo study},
author = {Giulio Costantini and Andrea Puglisi},
journal= {arXiv preprint arXiv:1005.4108},
year = {2010}
}
Comments
10 pages, 7 figures, submitted for publication