2010/05/22 by Giulio Costantini, Andrea Puglisi
Engineering · Materials Science · Mathematics · Physics and Astronomy · #Amplitude #Direct simulation Monte Carlo #Dissipation #Dynamic Monte Carlo method #Granular flow and fluidized beds #Homogeneous #Kinetic Monte Carlo #Markov chain Monte Carlo #Material Dynamics and Properties #Mathematics #Monte Carlo method #Monte Carlo molecular modeling #Noise (video) #Phase Equilibria and Thermodynamics #Physics #Quantum mechanics #Statistical physics #Thermodynamics #cond-mat.soft
paper · pdf · doi:10.1103/physreve.82.011305
published as Phys. Rev. E 82, 011305 (2010) · 10 pages, 7 figures, submitted for publication
arxiv created 2010/05/22 · openalex publication_date 2010/07/26 · arxiv updated 2010/09/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.