# The Hatano-Sasa equality: transitions between steady states in a granular gas.

Abstract : An experimental study is presented, about transitions between Non-Equilibrium Steady States (NESS) in a dissipative medium. The core device is a small rotating blade that imposes cycles of increasing and decreasing forcings to a granular gas, shaken independently. The velocity of this blade is measured, subject to the transitions imposed by the periodic torque variation. \\ The Hatano-Sasa equality, that generalises the second principle of thermodynamics to NESS, is verified with a high accuracy (a few $10^{-3}$), at different variation rates. \\ Besides, it is observed that the fluctuating velocity at fixed forcing follows a generalised Gumbel distribution. A rough evaluation of the mean free path in the granular gas suggests that it might be a correlated system, at least partially.
Type de document :
Article dans une revue
2012, pp.6

Littérature citée [7 références]

https://hal-ens-lyon.archives-ouvertes.fr/ensl-00724058
Contributeur : Antoine Naert <>
Soumis le : mercredi 10 octobre 2012 - 22:56:25
Dernière modification le : jeudi 19 avril 2018 - 14:54:03
Document(s) archivé(s) le : vendredi 11 janvier 2013 - 03:42:52

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• HAL Id : ensl-00724058, version 2
• ARXIV : 1208.4039

### Citation

Anne Mounier, Antoine Naert. The Hatano-Sasa equality: transitions between steady states in a granular gas.. 2012, pp.6. 〈ensl-00724058v2〉

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