Dynamics of clustering in freely cooling granular fluid
Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research - Jakkur P.O, Bangalore 560064, India
Received: 30 September 2014
Accepted: 1 December 2014
Via the event-driven molecular-dynamics simulations, we have studied the structure and dynamics in a model granular fluid of hard discs in space dimension d = 2. Inelastic collisions among these discs lead to clustering, resembling the kinetics in a vapor-liquid phase transition. The structural growth of these clusters are quantified via an application of finite-size scaling theory. We also present results for the decay of the kinetic energy. Discussion on the validity of a scaling argument, connecting the latter with the time dependence of clustering, is provided. Further, a striking difference in the finite-size effects of the kinetics with those of the phase transition dynamics is pointed out.
PACS: 64.60.Ht – Dynamic critical phenomena / 64.70.Ja – Liquid-liquid transitions / 45.70.Mg – Granular flow: mixing, segregation and stratification
© EPLA, 2014