Non-Equilibrium Thermodynamic Description of the Coupling between Structural and Entropic Modes in Supercooled Liquids
Disordered Systems and Neural Networks
2009-11-07 v1 Statistical Mechanics
Abstract
The density response of supercooled glycerol to an impulsive stimulated thermal grating (q=0.63 micron^-1) has been studied in the temperature range (T=200-340 K) where the structure rearrangement (alpha-relaxation) and thermal diffusion occur on the same time scale. A strong interaction between the two modes occurs giving rise to a dip in the T-dependence of the apparent thermal conductivity and a flattening of the apparent alpha-relaxation time upon cooling. A non-equilibrium thermodynamic (NET) model for the long time response of relaxing fluids has been developed. The model is capable to reproduce the experimental data and to explain the observed phenomenology.
Keywords
Cite
@article{arxiv.cond-mat/0211377,
title = {Non-Equilibrium Thermodynamic Description of the Coupling between Structural and Entropic Modes in Supercooled Liquids},
author = {R. Di Leonardo and A. Taschin and M. Sampoli and R. Torre and G. Ruocco},
journal= {arXiv preprint arXiv:cond-mat/0211377},
year = {2009}
}
Comments
to be published in PRE Rapid Commun