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ISSN Online: 2377-424X

International Heat Transfer Conference 12
August, 18-23, 2002, Grenoble, France

On the Soret effect of a simple binary mixture in bulk fluid and in porous medium, a NonEquilibrium Molecular Dynamics approach

Get access (open in a dialog) DOI: 10.1615/IHTC12.4000
6 pages

Abstract

The aim of this study is to gain a better understanding of the thermal diffusion process on a microscopic scale. A NonEquilibrium Molecular Dynamics (NEMD) program was created in order to compute values of this cross transport property for binary mixtures of Lennard-Jones (LJ) spheres. Firstly, the separate influence of various parameters ratios in bulk fluid mixtures has been studied, these parameters being the mass, the atomic diameter and the interaction strength. Simple laws which correlate with the results have been established. Then, the influence of two porous geometries on thermal diffusion has been studied, namely the slit pore and the composite spheres. Results indicate that, mainly for the thinnest pores, thermal diffusion is reduced.