TY - JOUR
T1 - Nonlocal effects and second sound in a nonequilibrium steady state
AU - Cimmelli, V. A.
AU - Sellitto, A.
AU - Jou, D.
PY - 2009/1/5
Y1 - 2009/1/5
N2 - The influence of weakly nonlocal effects on the speed of second sound along or against the direction of a nonvanishing average heat flow is explored in a formalism based on a dynamical nonequilibrium temperature. The restrictions from the second law of thermodynamics on the nonlocal evolution equation of this temperature are studied from a gradient extension of classical Liu procedure, and the corresponding form of the entropy is derived. Stability requirements obtained from the second differential of the entropy are seen to restrict a nonlinear dependence of the thermal conductivity on the temperature gradient. © 2009 The American Physical Society.
AB - The influence of weakly nonlocal effects on the speed of second sound along or against the direction of a nonvanishing average heat flow is explored in a formalism based on a dynamical nonequilibrium temperature. The restrictions from the second law of thermodynamics on the nonlocal evolution equation of this temperature are studied from a gradient extension of classical Liu procedure, and the corresponding form of the entropy is derived. Stability requirements obtained from the second differential of the entropy are seen to restrict a nonlinear dependence of the thermal conductivity on the temperature gradient. © 2009 The American Physical Society.
UR - https://www.scopus.com/pages/publications/59249088313
U2 - 10.1103/PhysRevB.79.014303
DO - 10.1103/PhysRevB.79.014303
M3 - Article
SN - 1098-0121
VL - 79
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
M1 - 014303
ER -