Experimental study of work exchange with a granular gas: The viewpoint of the Fluctuation Theorem
Laboratoire de Physique de l'École Normale Supérieure de Lyon, Université de Lyon, CNRS 46 Allée d'Italie, 69364 Lyon cedex 7, France, EU
Accepted: 6 December 2011
This article reports on an experimental study of the fluctuations of energy flux between a granular gas and a small driven harmonic oscillator. The DC-motor driving this system is used simultaneously as actuator and probe. The statistics of work fluctuations at controlled forcing, between the motor and the gas are examined from the viewpoint of the Fluctuation Theorem. A characteristic energy Ec of the granular gas, is obtained from this relation between the probabilities of an event and its reversal.
PACS: 05.70.Ln – Nonequilibrium and irreversible thermodynamics / 05.40.-a – Fluctuation phenomena, random processes, noise, and Brownian motion
© EPLA, 2012