https://doi.org/10.1140/epje/i2014-14107-1
Regular Article
High-pressure mass transport properties measured by dynamic near-field scattering of non-equilibrium fluctuations
Laboratoire des Fluides Complexes et leurs Réservoirs, UMR 5150, Université de Pau et des Pays de l’Adour, 64600, Anglet, France
* e-mail: henri.bataller@univ-pau.fr
Received:
19
September
2014
Revised:
21
October
2014
Accepted:
22
October
2014
Published online:
19
November
2014
High-pressure mass diffusion and Soret coefficients of the equimassic 1,2,3,4-tetrahydronaphthalene and n-dodecane binary mixture are obtained from dynamic light scattering analysis of concentration non-equilibrium fluctuations at the steady state of Soret-driven separation. A high-pressure shadowgraph set-up has been developed to investigate thermodiffusion in free medium from atmospheric pressure up to 20MPa. Results at atmospheric pressure show excellent agreement with benchmark values. High-pressure results for the mass diffusion coefficient confirm theoretical predictions by Leffler-Cullinan relation. Further calculation of the thermodiffusion coefficient allows also comparison with previous experimental results with, again, very good agreement.
Key words: Topical Issue: Thermal non-equilibrium phenomena in multi-component fluids
© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg, 2014
