Coefficient of normal restitution of viscous particles and cooling rate of granular gases

TL;DR

This paper studies how velocity-dependent restitution coefficients affect the cooling rate of granular gases, revealing slower cooling compared to constant restitution, which impacts clustering and structure formation.

Contribution

It introduces the effect of velocity-dependent restitution coefficients on the cooling dynamics of granular gases, highlighting their influence on clustering behavior.

Findings

Cooling rate is slower with velocity-dependent restitution.

Velocity dependence significantly affects clustering processes.

Material cooling dynamics are altered by restitution variability.

Abstract

We investigate the cooling rate of a gas of inelastically interacting particles. When we assume velocity dependent coefficients of restitution the material cools down slower than with constant restitution. This behavior might have large influence to clustering and structure formation processes.