TY - JOUR

T1 - Homogeneous cooling of rough, dissipative particles

T2 - Theory and simulations

AU - Luding, S.

AU - Huthmann, M.

AU - McNamara, S.

AU - Zippelius, A.

PY - 1998/1/1

Y1 - 1998/1/1

N2 - We investigate freely cooling systems of rough spheres in two and three dimensions. Simulations using an event-driven algorithm are compared with results of an approximate kinetic theory, based on the assumption of a generalized homogeneous cooling state. For short times [Formula Presented] translational and rotational energy are found to change linearly with [Formula Presented] For large times both energies decay like [Formula Presented] with a ratio independent of time, but not corresponding to equipartition. Good agreement is found between theory and simulations, as long as no clustering instability is observed. System parameters, i.e., density, particle size, and particle mass can be absorbed in a rescaled time, so that the decay of translational and rotational energy is solely determined by normal restitution and surface roughness.

AB - We investigate freely cooling systems of rough spheres in two and three dimensions. Simulations using an event-driven algorithm are compared with results of an approximate kinetic theory, based on the assumption of a generalized homogeneous cooling state. For short times [Formula Presented] translational and rotational energy are found to change linearly with [Formula Presented] For large times both energies decay like [Formula Presented] with a ratio independent of time, but not corresponding to equipartition. Good agreement is found between theory and simulations, as long as no clustering instability is observed. System parameters, i.e., density, particle size, and particle mass can be absorbed in a rescaled time, so that the decay of translational and rotational energy is solely determined by normal restitution and surface roughness.

UR - http://www.scopus.com/inward/record.url?scp=0001386809&partnerID=8YFLogxK

U2 - 10.1103/PhysRevE.58.3416

DO - 10.1103/PhysRevE.58.3416

M3 - Article

AN - SCOPUS:0001386809

VL - 58

SP - 3416

EP - 3425

JO - Physical review E: covering statistical, nonlinear, biological, and soft matter physics

JF - Physical review E: covering statistical, nonlinear, biological, and soft matter physics

SN - 2470-0045

IS - 3

ER -