Oscillatory instability in a driven granular gas

E. Khain*, B. Meerson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


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-dynamics 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.

Original languageAmerican English
Pages (from-to)193-199
Number of pages7
JournalEurophysics Letters
Issue number2
StatePublished - Jan 2004


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