Energy non-equipartition in systems of inelastic, rough spheres

Details Energy non-equipartition in systems of inelastic, rough spheres Energy non-equipartition in systems of inelastic, rough spheres

1998-05-20

arxiv.org/abs/cond-mat/9805257v1

Physics

Condensed Matter

Statistical Mechanics

4 pages latex, 4 embedded eps figures, accepted by Phys Rev E

Scientific paper

10.1103/PhysRevE.58.2247

We calculate and verify with simulations the ratio between the average translational and rotational energies of systems with rough, inelastic particles, either forced or freely cooling. The ratio shows non-equipartition of energy. In stationary flows, this ratio depends mainly on the particle roughness, but in nonstationary flows, such as freely cooling granular media, it also depends strongly on the normal dissipation. The approach presented here unifies and simplifies different results obtained by more elaborate kinetic theories. We observe that the boundary induced energy flux plays an important role.

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