Granular gases: dynamics and collective effects

Alain Barrat 1, Emmanuel Trizac 2, Matthieu H. Ernst 3

Journal of Physics: Condensed Matter 17 (2005) S2429-S2437

We present a biased review of some of the most \'spectacular\' effects appearing in the dynamics of granular gases where the dissipative nature of the collisions leads to a rich phenomenology, exhibiting striking differences with equilibrium gases. Among these differences, the focus here is on the illustrative examples of ``Maxwell Demon\'\'-like experiment, modification of Fourier\'s law, non-equipartition of energy and non-Gaussianity of the velocity distributions. The presentation remains as non technical as possible.

  • 1. Laboratoire de Physique Théorique d'Orsay (LPT),
    CNRS : UMR8627 – Université Paris XI - Paris Sud
  • 2. Laboratoire de Physique Théorique et Modèles Statistiques (LPTMS),
    CNRS : UMR8626 – Université Paris XI - Paris Sud
  • 3. Instituut voor Theoretische Fysica,
    Universiteit Utrecht