Soret motion in non-ionic binary molecular mixtures
Langue
en
Article de revue
Ce document a été publié dans
Journal of Chemical Physics. 2011-08-01, vol. 135, n° 5, p. 054102
American Institute of Physics
Résumé en anglais
We study the Soret coefficient of binary molecular mixtures with dispersion forces. Relying on standard transport theory for liquids, we derive explicit expressions for the thermophoretic mobility and the Soret coefficient. ...Lire la suite >
We study the Soret coefficient of binary molecular mixtures with dispersion forces. Relying on standard transport theory for liquids, we derive explicit expressions for the thermophoretic mobility and the Soret coefficient. Their sign depends on composition, the size ratio of the two species, and the ratio of Hamaker constants. Our results account for several features observed in experiment, such as a linear varition with the composition; they confirm the general rule that small molecules migrate to the warm, and large ones to the cold.< Réduire
Mots clés en anglais
thermal diffusion
Soret effect
molecular mixtures
polymer thermophoresis
Origine
Importé de halUnités de recherche