Molecular Dynamics Simulation of Heat-Conducting Near-Critical Fluids
Statistical Mechanics
2009-11-10 v3
Abstract
Using molecular dynamics simulations, we study supercritical fluids near the gas-liquid critical point under heat flow in two dimensions. We calculate the steady-state temperature and density profiles. The resultant thermal conductivity exhibits critical singularity in agreement with the mode-coupling theory in two dimensions. We also calculate distributions of the momentum and heat fluxes at fixed density. They indicate that liquid-like (entropy-poor) clusters move toward the warmer boundary and gas-like (entropy-rich) regions move toward the cooler boundary in a temperature gradient. This counterflow results in critical enhancement of the thermal conductivity.
Keywords
Cite
@article{arxiv.cond-mat/0405289,
title = {Molecular Dynamics Simulation of Heat-Conducting Near-Critical Fluids},
author = {Toshiyuki Hamanaka and Ryoichi Yamamoto and Akira Onuki},
journal= {arXiv preprint arXiv:cond-mat/0405289},
year = {2009}
}