Effect of reboosting manoeuvres on the determination of the Soret coefficients of DCMIX ternary systems

Jurado, R.; Pallarès, Jordi; Gavaldà, Jna.; Ruíz, Xavier

doi:10.1016/j.ijthermalsci.2019.04.025

Cited by 10 publications

(4 citation statements)

References 31 publications

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“…The validity of the model have been extensively verified with numeric and experimental results in both Cartesian and cylindrical cases respectively [34,35,42]. Similar solver and numerical schemes have been used in our previous work regarding g-jitters influence on ternary mixture [43,44].…”

Section: Numerical Modelmentioning

confidence: 80%

Stability analysis under thermogravitational effect

Šeta

Gavaldà

Bou-Ali

et al. 2020

International Journal of Thermal Sciences

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Section: Numerical Modelmentioning

confidence: 80%

Stability analysis under thermogravitational effect

Šeta

Gavaldà

Bou-Ali

et al. 2020

International Journal of Thermal Sciences

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“…Relatively small vibrations, often called g-jitter in microgravity environments and arising from on-board machinery, crew movements, orbit or docking maneuvers, and so on, can have an amplified effect. It is important, for one thing, to understand exactly what effects are expected from vibrations in order to avoid or minimize disruption to sensitive experiments [73]. Although the g-jitter present in space environments is largely unwelcome, deliberately applied vibrations can mimic the effects of gravity, as mentioned in Sec.…”

Section: Effect Of Gravity On Instabilitiesmentioning

confidence: 99%

A review of fluid instabilities and control strategies with applications in microgravity

Porter

Sánchez

Shevtsova

et al. 2021

Math. Model. Nat. Phenom.

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We give a brief review of several prominent fluid instabilities representing transitions driven by gravity, surface tension, thermal energy, and applied motion/acceleration. Strategies for controlling these instabilities, including their pattern formation properties, are discussed. The importance of gravity for many common fluid instabilities is emphasized and used to understand the sometimes dramatically different behavior of fluids in microgravity environments. This is illustrated in greater detail, using recent results, for the case of the frozen wave instability, which leads to large columnar structures in the absence of gravity. The development of these highly nonlinear states is often complex, but can be manipulated through an appropriate choice of forcing amplitude, container length and height, initial inclination of the surface, and other parameters affecting the nonlinear and inhomogeneous growth process. The increased opportunity for controlling fluids and their instabilities via small forcing or parameter changes in microgravity is notable.

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“…However, the transient (pulse-like) acceleration of external forces (docking, orbit correction, etc.) may affect the diffusion-controlled processes depending on the duration of the pulse [20,21]. Regularly, accelerometric data are analyzed only for a few runs per experiment [22,23].…”

Section: Temperature Controlmentioning

confidence: 99%

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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Effect of reboosting manoeuvres on the determination of the Soret coefficients of DCMIX ternary systems

Cited by 10 publications

References 31 publications

Stability analysis under thermogravitational effect

Stability analysis under thermogravitational effect

A review of fluid instabilities and control strategies with applications in microgravity

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

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