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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-421-2

International Heat Transfer Conference 15
August, 10-15, 2014, Kyoto, Japan

Molecular Dynamics Study on Influences of Surface Structural Characteristics on Thermal Energy Transport over Liquid-Solid Interfaces

Get access (open in a dialog) DOI: 10.1615/IHTC15.mlt.008513
pages 4973-4986

Résumé

Non-equilibrium classical molecular dynamics simulations were used to directly investigate the influence of adherent channel structures at the nanometer scale (nanochannel) on the thermal resistance at a liquid-solid interface, the interfacial local non-equilibrium characteristics of liquid molecules and the energy transport mechanism at the liquid-solid interface. A liquid molecular region confined between parallel solid walls was employed as a calculation system, using Lennard-Jones or SPC/E models for the interparticle potential. The adherent nanochannel width was treated as one of the calculation parameters. The interfacial thermal resistance and the energy transport mechanism at the liquid-solid interface are found to vary depending on the nanochannel width under the conditions used in the calculation. There is a certain relationship between the interfacial thermal resistance and the degree of local non-equilibrium characteristics of liquid molecules evaluated by the difference between temperature averaged over all degrees of freedom of liquid molecules and that of specific degrees of freedom at the liquid-solid interface. The variation of the energy transport mechanism at the liquid-solid interface is found to be related to variations in the interfacial thermal resistance and the local non-equilibrium characteristics at the liquid-solid interface, regardless of the liquid molecular models employed.