title: Soret coefficient of the n-dodecane-n-hexane binary mixture under high pressure.
abstract: In the present work, the Soret coefficient has been determined at high pressure for a binary hydrocarbon mixture by combining the thermogravitational column and the dynamic near-field imaging techniques. The analyzed mixture is an iso-massic n -dodecane-n -hexane mixture at 298.15K. The molecular diffusion coefficient has been measured up to 20MPa by means of the dynamic analysis of the light scattered by non-equilibrium concentration fluctuations. With a cylindrical thermogravitational column the thermodiffusion coefficient was determined from 0.1MPa to 10MPa. Density, as well as, mass expansion and thermal expansion have been measured with a high pressure densimeter. Dynamic viscosity at up to 20MPa has been determined with a high pressure viscometer. This work shows the decreasing tendency of both the molecular diffusion and the thermodiffusion coefficient with increasing pressure.
authors.affiliation: MGEP Mondragon Goi Eskola Politeknikoa, Mechanical and Industrial Manufacturing Department, Loramendi 4, Apartado 23, 20500, Mondragon, Spain.
authors.forename: Ion
authors.initials: I
authors.lastname: Lizarraga
authors.affiliation: Univ. Pau & Pays Adour, CNRS, TOTAL, LFCR-IPRA, UMR5150, 1 allée du Parc Montaury, 64600, Anglet, France.|CNES Centre National d'Études Spatiales, 2 place Maurice Quentin, 75 039, Paris Cedex 01, France.
authors.forename: Fabrizio
authors.initials: F
authors.lastname: Croccolo
authors.affiliation: Univ. Pau & Pays Adour, CNRS, TOTAL, LFCR-IPRA, UMR5150, 1 allée du Parc Montaury, 64600, Anglet, France.
authors.forename: Henri
authors.initials: H
authors.lastname: Bataller
authors.affiliation: MGEP Mondragon Goi Eskola Politeknikoa, Mechanical and Industrial Manufacturing Department, Loramendi 4, Apartado 23, 20500, Mondragon, Spain. mbouali@mondragon.edu.
authors.forename: M
authors.initials: M
authors.lastname: Mounir Bou-Ali
keywords: Topical Issue: Non-isothermal transport in complex fluids