Numerical simulation of vibrated granular gases under realistic boundary conditions

TL;DR

This paper uses a modified Direct Simulation Monte Carlo method to study vibrated granular gases in 2D and 3D, analyzing effects of density, restitution, and boundary conditions, with results aligning with experimental data.

Contribution

It introduces a simulation approach for granular gases under realistic vibrating boundary conditions, highlighting the impact of energy injection and clustering phenomena.

Findings

Simulation results agree with experimental data

Clustering transition observed with increasing density

Behavior of pressure and energy injection discussed

Abstract

A variant of the Direct Simulation Monte Carlo method is used to study the behavior of a granular gas, in two and three dimensions, under varying density, restitution coefficient, and inelasticity regimes, for realistic vibrating wall conditions. Our results agree quite well with recent experimental data. The role of the energy injection mechanism is discussed, as well as the behavior of state-functions, such as pressure, under realistic boundary conditions. Upon a density increase, we find signals of a clustering transition.