Heat transport through a solid-solid junction : The interface as an autonomous thermodynamic system
Rurali, Riccardo (Institut de Ciència de Materials de Barcelona)
Colombo, Luciano (Institut Català de Nanociència i Nanotecnologia)
Cartoixà Soler, Xavier (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
Øivind, Wilhelmsen (SINTEF Energy Research)
Trinh, Thuat T. (Norwegian University of Science and Technology. Department of Chemistry)
Bedeaux, Dick (Norwegian University of Science and Technology. Department of Chemistry)
Kjelstrup, Signe (Norwegian University of Science and Technology. Department of Chemistry)

Date:	2016
Abstract:	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.
Grants:	Ministerio de Economía y Competitividad FIS2012-37549-C05-02 Ministerio de Economía y Competitividad MAT2013-40581-P Ministerio de Economía y Competitividad TEC2012-31330 Ministerio de Economía y Competitividad TEC2015-67462-C2-1-R Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-301 Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-384 Ministerio de Economía y Competitividad SEV-2013-0295 Ministerio de Economía y Competitividad SEV-2015-0496
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Published in:	Physical chemistry chemical physics, Vol. 18, Issue 20 (May 2016) , p. 13741-13745, ISSN 1463-9076

DOI: 10.1039/c6cp01872f

5 p, 1.9 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles