Frictional Cooling of Granular Gases: A Molecular Dynamics Study

Prasenjit Das, Moshe Schwartz, Sanjay Puri

Research output: Contribution to journalConference articlepeer-review

Abstract

We study the free evolution of frictional granular gases using large scale molecular dynamics simulation in three dimensions. The system cools due to solid friction among the interacting particles. At early stages of evolution, the density field remains homogeneous and the velocity field follows the Maxwell-Boltzmann (MB) distribution. However, at later times, the density field shows clustering and the velocity field shows local ordering. The ordering in the velocity field is studied by invoking analogy from phase ordering systems. The equal-time correlation function of velocity field follows dynamical scaling. The correlation length of velocity field, Lv (t), exhibits power law growth: Lv (t) ~ t 1/3.

Original languageEnglish
Article number012035
JournalJournal of Physics: Conference Series
Volume905
Issue number1
DOIs
StatePublished - 7 Nov 2017
Event28th Annual IUPAP Conference on Computational Physics, CCP 2016 - Pretoria, South Africa
Duration: 10 Jul 201614 Jul 2016

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