Analysis of a class of granular motors in the brownian limit.
We analyze the dynamics of heterogeneous granular particles immersed in a bath of thermalized particles, which are candidates for granular motors, with a mechanical approach. We first apply the method to the previously introduced asymmetric piston and show that it gives the exact drift velocity in the brownian limit. We also obtain results for the efficiency of the motor and compare with numerical simulations. Finally, we introduce a chiral rotor model and discuss opportunities for observing a real granular motor.
Talbot
Julian
J
Laboratoire de Physique Théorique de la Matière Condensée, Université Pierre et Marie Curie, UMR 7600 CNRS, 4 Place Jussieu, 75252 Paris Cedex 05, France.
Burdeau
Alexis
A
Viot
Pascal
P