This paper presents experimental results on the solutocapillary Marangoni convection, an effect that occurs in a thin horizontal layer of the inhomogeneous solution of a surface-tension-active agent (surfactant), either near the free upper boundary of the layer or near the surface of an air bubble injected into the fluid. A procedure using interferometry is developed for simultaneously visualizing convective flow structures and concentration fields. A number of new phenomena are observed, including the deformation and rupture of the liquid layer due to a surfactant droplet spread over its surface; bubble self-motion (migration) toward higher surfactant concentrations; self-sustained convective flow oscillations around stationary bubbles in a fluid vertically stratified in concentration; and the existence of a threshold for a solutal Marangoni flow in thin layers. A comparison of solutocapillary and thermo-capillary phenomena is made.

PACS: 47.20.Dr, 47.55.nb, 47.55.pf (all) DOI: 10.1070/PU2008v051n10ABEH006566 URL: https://ufn.ru/en/articles/2008/10/d/ 000262714300004 2-s2.0-67849092394 2008PhyU...51.1027Z Citation: Zuev A L, Kostarev K G "Certain peculiarities of the solutocapillary convection" Phys. Usp. 51 1027–1045 (2008) BibTexBibNote ® (generic)BibNote ® (RIS)MedlineRefWorks Оригинал: Зуев А Л, Костарев К Г «Особенности концентрационно-капиллярной конвекции» УФН 178 1065–1085 (2008); DOI: 10.3367/UFNr.0178.200810d.1065