K.G. Kostareva aPerm Federal Research Center of the Ural Branch of the Russian Academy of Sciences, Lenina str. 13a, Perm, 614990, Russian Federation bPerm National Research Polytechnic University, Komsomol'skii prosp. 29, Perm, 614990, Russian Federation
The review presents the results of an experimental study of various oscillatory regimes of concentration Marangoni convection caused by the competition between the capillary and gravitational mechanisms of motion in two-phase fluid systems. The use of optical methods makes it possible to pass from a qualitative description of phenomena to quantitative measurements and to reveal the dependences of the oscillation period and the duration of the oscillatory mode on the characteristics of the concentration distribution of surface-active substances (surfactants), physicochemical properties and surface activity of the used contacting liquids and surfactants. The development of oscillatory flow regimes near bubbles and drops in vertical and horizontal layers, as well as near the vertical interface, is analyzed.
Keywords: Marangoni convection, concentration-capillary flows, surface tension, interphase boundary, oscillation regime PACS:47.20.Dr, 47.55.nb, 47.55.pf (all) DOI:10.3367/UFNe.2021.07.039030 Citation: Denisova M O, Zuev A L, Kostarev K G "Oscillating modes of concentration convection" Phys. Usp., accepted
Received: 9th, April 2021, revised: 26th, July 2021, accepted: 28th, July 2021