Determination of the thermodiffusion coefficient in three binary organic liquid mixtures by the thermogravitational method (contribution of the Universidad del País Vasco, Bilbao, to the benchmark test)

Experimental approaches to study thermodiffusion – A review

“…Ref. [20]). Again, this is attributed to the over simplification of the theoretical equations in the FJO theory.…”

“…Since its discovery over a century ago, the Soret effect has been studied in various systems: Gases [16,17], electrolytes [18], liquid hydrocarbons [19,20], alcohols [21,22], ferrofluids [23,24], polymers [25e28], proteins [29], combustion [30], surfactant micelles [31], latex particles [32] etc. Despite this, there is only a limited understanding of the macroscopic principles governing the Soret effect.…”

Thermodiffusion and molecular diffusion in binaryn-alkane mixtures: experiments and numerical analysis

“…A comparison of a subset of these methods was presented by Platten et al [28] in which binary mixtures of dodecane, isobutylbenzene and 1,2,3,4-tetrahydronaphthalene were investigated using several experimental approaches. From the results of these experiments, the Fontainebleau benchmark values of thermodiffusion coefficient for these mixtures were established [23,[29][30][31][32]. A detailed review of all the methods has been published recently by Srinivasan and Saghir [33].…”

“…This has prompted theoretical [9][10][11][12][13][14][15][16] as well as experimental investigations [17][18][19][20] on thermodiffusion in hydrocarbon mixtures. While a theoretical formulation exists for multi-component mixtures [21], due to the complexity of the problem, experiments are often undertaken on binary [18,22,23] and ternary [24][25][26] hydrocarbon mixtures. Recently, a fourcomponent mixture has also been studied by Van Vaerenbergh et al [27].…”

Measurement of the Soret, diffusion, and thermal diffusion coefficients of three binary organic benchmark mixtures and of ethanol–water mixtures using a beam deflection technique

“…The experimental techniques employed by the five participating laboratories were transient holographic gratings [10,11], annular and parallelepipedic thermogravitational columns [12], vertical parallelepipedic columns with velocity amplitude determination by laser Doppler velocimetry [13], and an annular thermogravitational column filled with a porous medium in the gap [14]. The various thermogravitational column techniques are based on the coupling of convection and diffusion.…”