Heat transport through a solid-solid junction: The interface as an autonomous thermodynamic system

Riccardo Rurali, Luciano Colombo, Xavier Cartoixà, W. >Øivind, Thuat T. Trinh, Dick Bedeaux, Signe Kjelstrup

Research output: Contribution to journalArticleResearchpeer-review

14 Citations (Scopus)

Abstract

© The Owner Societies 2016. We perform computational experiments using nonequilibrium molecular dynamics simulations, showing that the interface between two solid materials can be described as an autonomous thermodynamic system. We verify the local equilibrium and give support to the Gibbs description of the interface also away from the global equilibrium. In doing so, we reconcile the common formulation of the thermal boundary resistance as the ratio between the temperature discontinuity at the interface and the heat flux with a more rigorous derivation from nonequilibrium thermodynamics. We also show that thermal boundary resistance of a junction between two pure solid materials can be regarded as an interface property, depending solely on the interface temperature, as implicitly assumed in some widely used continuum models, such as the acoustic mismatch model. Thermal rectification can be understood on the basis of different interface temperatures for the two flow directions.
Original languageEnglish
Pages (from-to)13741-13745
JournalPhysical Chemistry Chemical Physics
Volume18
Issue number20
DOIs
Publication statusPublished - 1 Jan 2016

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