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Granular Gas Cooling And Relaxation To The Steady State In Regard To The Overpopulated Tail Of The Velocity Distribution

Author

Listed:
  • THORSTEN PÖSCHEL

    (Charité, Augustenburger Platz, 10439 Berlin, Germany)

  • NIKOLAI V. BRILLIANTOV

    (Institute of Physics, University of Potsdam, Am Neuen Palais 10, 14469 Potsdam, Germany)

  • ARNO FORMELLA

    (Universidad de Vigo, Department of Computer Science, Edificio Politécnico, 32004 Ourense, Spain)

Abstract

We present a universal description of the velocity distribution function of granular gases,f(v), valid for both, small and intermediate velocities wherevis close to the thermal velocity and also for largevwhere the distribution function reveals an exponentially decaying tail. By means of large-scale Monte Carlo simulations and by kinetic theory we show that the deviation from the Maxwell distribution in the high-energy tail leads to small but detectable variation of the cooling coefficient and to extraordinary large relaxation time.

Suggested Citation

  • Thorsten Pöschel & Nikolai V. Brilliantov & Arno Formella, 2007. "Granular Gas Cooling And Relaxation To The Steady State In Regard To The Overpopulated Tail Of The Velocity Distribution," International Journal of Modern Physics C (IJMPC), World Scientific Publishing Co. Pte. Ltd., vol. 18(04), pages 701-711.
    • Handle: RePEc:wsi:ijmpcx:v:18:y:2007:i:04:n:s0129183107010966
    DOI: 10.1142/S0129183107010966
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