Granular Gases in Compartmentalized Systems

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  • Lai Pik-Yin
    Department of Physics, Institute of Biophysics, and Center for Complex Systems, National Central University Institute of Physics, Academia Sinica
  • Hou Meiying
    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
  • Chan Chi-Keung
    Department of Physics, Institute of Biophysics, and Center for Complex Systems, National Central University Institute of Physics, Academia Sinica

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Although both granular gases (GG) and molecular gases (MG) are characterized by random motions of their constituents, phenomena not possible for MG, such as clustering and Maxwell’s demon are reported in GG. The origin of these intriguing phenomena is the dissipative collisions in GG which are coupled to the local density of the GG in a spatially extended or compartmentalized system. Systems with two or more types of grains are especially interesting because the asymmetry in the dissipative collisions between different types of grains can lead to oscillations and even more interesting dynamics. In this article, flux models with different granular temperatures for different types of grains are studied to understand and explore these phenomena.

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