Effective temperatures of a driven system near jamming.
Fluctuations in a model of a sheared, zero-temperature foam are studied numerically. Five different quantities that independently reduce to the true temperature in an equilibrium thermal system are calculated. One of the quantities is calculated up to an unknown coefficient. The other four quantities have the same value and all five have the same shear-rate dependence. These results imply that statistical mechanics is useful for the system even though it is far from thermal equilibrium.
Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, USA.
Ian K
IK
Ono
Corey S
CS
O'Hern
D J
DJ
Durian
Stephen A
SA
Langer
Andrea J
AJ
Liu
Sidney R
SR
Nagel