Comptes Rendus
Oscillatory Marangoni convection around the air bubble in a vertical surfactant stratification
Comptes Rendus. Mécanique, Volume 332 (2004) no. 1, pp. 1-7.

The solutocapillary Marangoni convection around a gas bubble in the inhomogeneous binary mixture of miscible fluids with a vertical surfactant concentration gradient was studied experimentally. A new phenomenon, the oscillatory instability of the surfactant mass transfer, near the bubble boundary, was detected and investigated. The interpretation of this effect as an interaction between the surfactant adsorption at the bubble free surface and solutocapillary and buoyancy convective mechanisms is proposed. The experimental data on oscillation period in relation to bubble dimensions, time, liquid layer thickness, physico-chemical fluid parameters and concentration gradients are presented and discussed.

On présente les résultats d'une étude expérimentale de la convection soluto-capillaire de Marangoni autour d'une bulle d'air dans un mélange inhomogène binaire des fluides miscibles, avec un gradient vertical de concentration surfactante. On a constaté et étudié un phénomène nouveau, une instabilité oscillatoire du transfert de masse surfactant au voisinage de la paroi de la bulle. L'interprétation de cet effet est proposée en termes d'une interaction entre l'adsorption surfactante de la surface libre de la bulle et des mécanismes soluto-capillaires et stabilité convective. Les données expérimentales concernant la relation entre la période des oscillations et les dimensions de la bulle, du temps, de l'épaisseur de la couche liquide, des paramètres physico-chimiques du fluide et des gradients de concentration sont présentées et discutées.

Received:
Accepted:
Published online:
DOI: 10.1016/j.crme.2003.10.014
Keywords: Fluid mechanics, Bubbles, Miscible liquids, Marangoni convection, Solutocapillary flow
Mot clés : Mécanique des fluides, Bulles, Liquides miscibles, Convection de Marangoni, Ecoulement soluto-capillaire

Konstantin Kostarev 1; Andrew Zuev 1; Antonio Viviani 2

1 Institute of Continuous Media Mechanics UB RAS, Acad. Korolev Str. 1, 614013 Perm, Russia
2 Seconda Universita di Napoli, via Roma 29, 81031 Aversa, Italy
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Konstantin Kostarev; Andrew Zuev; Antonio Viviani. Oscillatory Marangoni convection around the air bubble in a vertical surfactant stratification. Comptes Rendus. Mécanique, Volume 332 (2004) no. 1, pp. 1-7. doi : 10.1016/j.crme.2003.10.014. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2003.10.014/

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[2] Yu.K. Bratukhin; A.L. Zuev Thermocapillary drift of air bubbles in a horizontal Hele–Shaw cell, Fluid Dynamics, Volume 19 (1984) no. 3, pp. 393-397

[3] A.L. Zuev, V.A. Briskman, Yu.K. Bratukhin, A. Viviani, On terrestrial modeling of thermo-capillary migration of gas bubbles at weak buoyant convection, AIAA Paper 2001-0763, 2001, pp. 1–7

[4] A.L. Zuev; V.A. Briskman; K.G. Kostarev; J.C. Legros; A. Viviani Thermo-solutal migration of gas bubbles in binary liquid mixtures, 1st Int. Marangoni Association Conf., Giessen, Germany, 2001, pp. 4-5

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