4th International workshop on nonequilibrium thermodynamics and complex fluids

	IWNET 2006	4th International workshop on nonequilibrium thermodynamics and complex fluids 3-7 september 2006, Rhodes, Greece

Home Scope Location Speakers Program Abstracts Author index Organizing Committee Scientific Committee Venue & Accomodation Registration News Contact		ORAL PRESENTATION Session: 5 Non-equilibrium thermodynamics: Approaches and formalisms (scheduled: Wednesday, 10:45 ) On a possible difference between the barycentric velocity and the velocity that gives translational momentum in fluids D. Bedeaux¹, S. Kjelstrup¹, H.C. Öttinger² ¹ Dept. of Chem, Norw. Univ. of Sc. and Techn, Trondheim, Norway ² ETH Zürich, Dept. of Materials, Polymer Physics, Switzerland This contribution explores the rather controversial proposal by Howard Brenner that the velocities that follow from the mass flux and from the translational momentum in a fluid are not equal. We show that standard non-equilibrium thermodynamics can be formulated such that it is in full agreement with this proposal. We argue that the merits of the proposal must be based on the physics of the problem. It cannot be dismissed as being in contradiction with non-equilibrium thermodynamics. We show that Brenner's proposal gives a separation in a binary mixture beyond that of the Soret equilibrium, due to a gradient in the pressure divided by the temperature. Experiments to verify this are proposed. © IWNET 2006

		© and Kleanthi for IWNET 2006