Oscillatory instability in a driven granular gas
软凝聚态物质
2009-11-10 v1 混沌动力学
摘要
We discovered an oscillatory instability in a system of inelastically colliding hard spheres, driven by two opposite "thermal" walls at zero gravity. The instability, predicted by a linear stability analysis of the equations of granular hydrodynamics, occurs when the inelasticity of particle collisions exceeds a critical value. Molecular dynamic simulations support the theory and show a stripe-shaped cluster moving back and forth in the middle of the box away from the driving walls. The oscillations are irregular but have a single dominating frequency that is close to the frequency at the instability onset, predicted from hydrodynamics.
引用
@article{arxiv.cond-mat/0311303,
title = {Oscillatory instability in a driven granular gas},
author = {Evgeniy Khain and Baruch Meerson},
journal= {arXiv preprint arXiv:cond-mat/0311303},
year = {2009}
}
备注
7 pages, 4 figures, to appear in Europhysics Letters