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Injected power and entropy flow in a heated granular gas

P. Visco·A. Puglisi·A. Barrat·E. Trizac·F. van Wijland
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Abstract

Our interest goes to the power injected in a heated granular gas and to the possibility to interpret it in terms of entropy flow. We numerically determine the distribution of the injected power by means of Monte-Carlo simulations. Then, we provide a kinetic theory approach to the computation of such a distribution function. Finally, after showing why the injected power does not satisfy a Fluctuation Relation a la Gallavotti-Cohen, we put forward a new quantity which does fulfill such a relation, and is not only applicable in a variety of frameworks outside the granular world, but also experimentally accessible.

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P. Visco, A. Puglisi, A. Barrat, E. Trizac, F. van Wijland. 2005-09-02. Injected power and entropy flow in a heated granular gas. https://doi.org/10.1209/epl%2Fi2005-10213-1

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