Oscillatory Marangoni convection around the air bubble in a vertical surfactant stratification
Authors:
- Konstantin KostarevKKKonstantin Kostarev
- Andrew ZuevAZAndrew Zuev
- Antonio VivianiAVAntonio Viviani
Open Access
- 18 December 2003
- journal article
- Published by MathDoc/Centre Mersenne in Comptes Rendus Mécanique
- Vol. 332 (1) , 1-7
Abstract
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.Keywords
This publication has 2 references indexed in Scilit:
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- The motion of bubbles in a vertical temperature gradientJournal of Fluid Mechanics, 1959