title: Fickian Diffusion in Ternary Mixtures Composed by 1,2,3,4-Tetrahydronaphthalene, Isobutylbenzene, and n-Dodecane.
abstract: We report the Fickian diffusion coefficients in 20 ternary mixtures formed by 1,2,3,4-tetrahydronaphthalene (THN), isobutylbenzene (IBB) and n-dodecane (nC12) measured by the Taylor dispersion technique at 298.1 K and atmospheric pressure. Four diffusion coefficients of the ternary mixtures were measured along six concentration paths starting on one binary subsystem and moving toward the other one. We found expressions for the diffusion matrix of a ternary mixture approaching to the binary limits. The measured diffusion coefficients were thoroughly verified by comparison with the theoretical asymptotic behavior. The main diffusion coefficients vary smoothly over the entire concentration space and D11 is always larger than D22. One of the two cross-diffusion coefficients is of the same order of magnitude as the main ones and, hence, not negligible, whereas the other one is close to zero. The investigated mixtures also comprise compositions that were examined in microgravity experiments in the ESA DCMIX1 project.
authors.affiliation: Laboratoire de Physique, École Normale Supérieure , 46 Allé d'Italie, 69364 Lyon France.
authors.forename: V
authors.initials: V
authors.lastname: Sechenyh
authors.affiliation: Microgravity Research Center, Université Libre de Bruxelles (ULB) , CP-165/62, Av. F.D. Roosevelt, 50, B-1050 Brussels, Belgium.|National Research Tomsk Polytechnic University , Lenin Avenue, 30, 634050, Tomsk, Russia.
authors.forename: J C
authors.initials: JC
authors.lastname: Legros
authors.affiliation: Microgravity Research Center, Université Libre de Bruxelles (ULB) , CP-165/62, Av. F.D. Roosevelt, 50, B-1050 Brussels, Belgium.
authors.forename: A
authors.initials: A
authors.lastname: Mialdun
authors.affiliation: Departamento de Física Aplicada I, Universidad Complutense de Madrid (UCM) , Avda. de Séneca, 2 Ciudad Universitaria, 28040 Madrid, Spain.
authors.forename: J M
authors.initials: JM
authors.lastname: Ortiz de Zárate
authors.affiliation: Microgravity Research Center, Université Libre de Bruxelles (ULB) , CP-165/62, Av. F.D. Roosevelt, 50, B-1050 Brussels, Belgium.
authors.forename: V
authors.initials: V
authors.lastname: Shevtsova