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Moment Equations for a Granular Material in a Thermal Bath

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Abstract

We compute the moment equations for a granular material under the simplifying assumption of pseudo-Maxwellian particles approximating dissipative hard spheres. We obtain the general moment equations of second and third order and the isotropic moment equations of any order. Our equations describe, in the space homogeneous case, the granular system described by a Boltzmann-like collision term and subject to a Brownian motion due to the interaction with a bath, described by a Fokker–Planck term. The trend to equilibrium is studied in detail.

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Bobylev, A.V., Cercignani, C. Moment Equations for a Granular Material in a Thermal Bath. Journal of Statistical Physics 106, 547–567 (2002). https://doi.org/10.1023/A:1013754205008

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  • DOI: https://doi.org/10.1023/A:1013754205008

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