Is Soret equilibrium a non-equlibrium effect?
Langue
en
Article de revue
Ce document a été publié dans
Comptes Rendus Mécanique. 2013-02-23, vol. 341, p. 438-448
Elsevier
Résumé en anglais
Recent thermophoretic experiments on colloidal suspensions revived an old debate, namely whether the Soret effect is properly described by thermostatics, or necessarily requires nonequilibrium thermodynamics. Based on ...Lire la suite >
Recent thermophoretic experiments on colloidal suspensions revived an old debate, namely whether the Soret effect is properly described by thermostatics, or necessarily requires nonequilibrium thermodynamics. Based on colloidal transport theory and the entropy production of the related viscous flow, our analysis leads to the conclusion that the equilibrium approach may work for small ions, yet fails for colloidal particles and polymers. Regarding binary molecular mixtures, our results shed some doubt on the validity of thermostatic approaches that derive the Soret coefficient from equilibrium potentials.< Réduire
Mots clés en anglais
Thermal diffusion
Soret coefficient
Non-equilibrium thermodynamics
Out-of-equilibrium systems
Onsager theory
Origine
Importé de halUnités de recherche