The Hatano-Sasa equality: transitions between steady states in a granular gas. - Archive ouverte HAL Access content directly
Journal Articles Year :

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

(1) , (1)
1
Anne Mounier
• Function : Author
Antoine Naert
• Function : Author
• PersonId : 906109

#### 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.

### Dates and versions

ensl-00724058 , version 1 (16-08-2012)
ensl-00724058 , version 2 (10-10-2012)

### Identifiers

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

### Cite

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

### Export

BibTeX TEI Dublin Core DC Terms EndNote Datacite

315 View