Volume 60, Number 6, December 2002
|Page(s)||854 - 860|
|Section||Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics|
|Published online||01 December 2002|
Rotationally driven gas of inelastic rough spheres
PMMH, École Supérieure de Physique
et de Chimie Industrielles (ESPCI)
10 rue Vauquelin, 75251 Paris Cedex 05, France
2 Institute for Computer Applications 1 Pfaffenwaldring 27, 70569 Stuttgart, Germany
3 Particle Technology, DelftChemTech, TU Delft Julianalaan 136, 2628 CJ Delft, The Netherlands
Accepted: 3 October 2002
We study a gas of inelastic rough spheres confined on a 2D plane, driven on the rotational degrees of freedom. Event-driven molecular dynamics (MD) simulations are compared to mean-field (MF) predictions with surprisingly good agreement for strong coupling of rotational and translational degrees of freedom —even for very strong dissipation in the translational degrees. Although the system is spatially homogeneous, the rotational velocity distribution is essentially Maxwellian. Surprisingly, the distribution of tangential velocities is strongly deviating from a Maxwellian. An interpretation of these results is proposed, as well as a setup for an experiment.
PACS: 45.70.-n – Granular systems / 51.10.+y – Kinetic and transport theory of gases / 47.11.+j – Computational methods in fluid dynamics
© EDP Sciences, 2002
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