Velocity distributions of granular gases with drag and with long-range interactions

K. Kohlstedt*, A. Snezhko, M. V. Sapozhnikov, I. S. Aranson, J. S. Olafsen, E. Ben-Naim

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

58 Scopus citations


We study velocity statistics of electrostatically driven granular gases. For two different experiments, (i) nonmagnetic particles in a viscous fluid and (ii) magnetic particles in air, the velocity distribution is non-Maxwellian, and its high-energy tail is exponential, P(v)∼exp (-|v|). This behavior is consistent with the kinetic theory of driven dissipative particles. For particles immersed in a fluid, viscous damping is responsible for the exponential tail, while for magnetic particles, long-range interactions cause the exponential tail. We conclude that velocity statistics of dissipative gases are sensitive to the fluid environment and to the form of the particle interaction.

Original languageEnglish (US)
Article number068001
JournalPhysical review letters
Issue number6
StatePublished - Aug 5 2005

ASJC Scopus subject areas

  • General Physics and Astronomy


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