The Soret effect in ternary mixtures of water+ethanol+triethylene glycol of equal mass fractions: Ground and microgravity experiments

Triller, Thomas; Sommermann, Daniel; Schraml, Marcel; Sommer, Felix; Lapeira, Estela; Bou-Ali, M. Mounir

doi:10.1140/epje/i2019-11789-7

Cited by 17 publications

(20 citation statements)

References 34 publications

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“…From the projections onto the axes it is seen that not all Soret coefficients are affected by the experimental uncertainties in the same way. This is a very encouraging result, showing that even under less favorable conditions the extraction of certain Soret and thermodiffusion coefficients is still possible with a decent accuracy [40].…”

Section: Dcmixmentioning

confidence: 71%

“…The evaluation of the DCMIX3 data is still work in progress. Nevertheless, a very good agreement could already be achieved between DCMIX3 results and thermogravitational column (TGC) and optical beam deflection (2-OBD) measurements [40,41]. Particularly for the latter, the optical contrast factors have turned out to be critical and their accurate measurement and theoretical modelling needs to be advanced further [42].…”

Section: Dcmixmentioning

confidence: 99%

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European Space Agency experiments on thermodiffusion of fluid mixtures in space

et al. 2019

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This paper describes the European Space Agency (ESA) experiments devoted to study thermodiffusion of fluid mixtures in microgravity environment, where sedimentation and convection do not affect the mass flow induced by the Soret effect. First, the experiments performed on binary mixtures in the IVIDIL and GRADFLEX experiments are described. Then, further experiments on ternary mixtures and complex fluids performed in DCMIX and planned to be performed in the context of the NEUF-DIX project are presented. Finally, multi-component mixtures studied in the SCCO project are detailed.

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Section: Dcmixmentioning

confidence: 71%

Section: Dcmixmentioning

confidence: 99%

European Space Agency experiments on thermodiffusion of fluid mixtures in space

et al. 2019

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“…Sign changes of the Soret coefficient render these mixtures particularly sensitive to unwanted convective instabilities under gravity conditions. For the mixture of symmetric composition with equal mass fractions it has been possible to obtain consistent results between the microgravity measurements and the laboratory ground experiments performed with optical beam deflection and with a thermogravitational column [6]. The evaluation of the other cells has not yet been finished.…”

Section: Introductionmentioning

confidence: 85%

Data quality assessment of Diffusion Coefficient Measurements in ternary mIXtures 4 (DCMIX4) experiment

et al. 2020

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Thermodiffusion, which leads to a component separation in a mixture due to the thermal gradient, still does not have an unambiguous microscopic picture. Therefore, experimental studies, especially in convection free environment, are important. As part of the 4th campaign on the DCMIX project, thermodiffusion experiments on three compositions of the toluene-methanol-cyclohexane ternary mixture, on a mixture of fullerene-tetrahydronaphthalene-toluene and on a mixture of polystyrene-toluene-cyclohexane have been performed in microgravity conditions on board the International Space Station. A binary mixture of polystyrene-toluene has been filled into the companion cell for the campaign. The Selectable Optical Diagnostics Instrument (SODI), wich is a two-wavelength Mach-Zehnder interferometer for the ternary mixtures, plus a monochromatic Mach-Zehnder interferometer for the binary mixture, has been used in order to obtain the temperature and the concentration fields in the cells. Precisely, it is a 5-steps phase-shifting interferometry technique which is implemented with SODI, producing by means of laser illumination a set of 5 phase-shifted images of between them as function of the time. A total of 58 runs of various durations and at different mean temperatures have been conducted. Here, we evaluate the contrast of the interferograms, the quality in the phase stepping, the stability of the thermal regulation of the experiments and the level of environmental disturbances on board the space station during the campaign.

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“…In Ref. 61, it has been shown that the directions of the major and the minor axis of the uncertainty ellipsoid are given by the right-singular vectors of the contrast factor matrix. Based on this observation, it appears that DCMIX1 experimental data do not allow retrieving the ternary Soret coefficients with the same accuracy as for typical binary mixtures.…”

Section: Analysis Of Errors On the Soret Coefficientsmentioning

confidence: 99%

Results of the DCMIX1 experiment on measurement of Soret coefficients in ternary mixtures of hydrocarbons under microgravity conditions on the ISS

Galand

Vaerenbergh

Khlybov

et al. 2019

The Journal of Chemical Physics

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The Soret effect in ternary mixtures of water+ethanol+triethylene glycol of equal mass fractions: Ground and microgravity experiments

Cited by 17 publications

References 34 publications

European Space Agency experiments on thermodiffusion of fluid mixtures in space

European Space Agency experiments on thermodiffusion of fluid mixtures in space

Data quality assessment of Diffusion Coefficient Measurements in ternary mIXtures 4 (DCMIX4) experiment

Results of the DCMIX1 experiment on measurement of Soret coefficients in ternary mixtures of hydrocarbons under microgravity conditions on the ISS

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