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Experimental study of energy transport between two granular gas thermostats.

Abstract : We report on the energy transport between two coupled probes in contact with granular thermostats at different temperatures. In our experiment, two identical blades, which are electromechanically coupled, are immersed in two granular gases maintained in different non-equilibrium stationary states, characterized by different temperatures. First, we show that the energy flux from one probe to another is, in temporal average, proportional to the temperature difference, as in the case of equilibrium thermostats. Second, we observe that the instantaneous flux is highly intermittent and that fluctuations exhibit an asymmetry which increases with the temperature difference. Interestingly, this asymmetry, related to irreversibility, is correctly accounted for by a relation strongly evoking the Fluctuation Theorem. As is, our experiment is a simple macroscopic realisation, suitable for the study of energy exchanges between systems in non-equilibrium steady states.
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Contributor : Antoine Naert Connect in order to contact the contributor
Submitted on : Thursday, September 25, 2014 - 2:21:48 PM
Last modification on : Wednesday, November 20, 2019 - 3:11:45 AM
Long-term archiving on: : Friday, April 14, 2017 - 12:00:40 PM


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  • HAL Id : ensl-00995592, version 3
  • ARXIV : 1405.6148



Charles-Édouard Lecomte, Antoine Naert. Experimental study of energy transport between two granular gas thermostats.. 2014. ⟨ensl-00995592v3⟩



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