Abstract
By the method of tracer particles the velocity field of thermocapillary convection in a thin layer of silicone oil, excited by a quasi-point heat source in the rigid substrate, is investigated as a function of the layer thickness, the temperature of the heater, and the liquid viscosity. The vertical velocity distributions are plotted in several cross-sections at different distances from the vortex axis. A novel method of measuring the profile of the thermocapillary depression, based on mirror reflection from the free liquid surface of radiation scattered by a tracer particle, is proposed. The central segment of the profile of the thermocapillary depression is obtained for different values of the layer thickness, the liquid viscosity and the heater temperature.
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Original Russian Text © B.A. Bezuglyi, V.M. Flyagin, 2007, published in Izvestiya Rossiiskoi Akademii Nauk, Mekhanika Zhidkosti i Gaza, 2007, Vol. 42, No. 6, pp. 124–134.
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Bezuglyi, B.A., Flyagin, V.M. Thermocapillary convection in a liquid layer with a quasi-point heat source in the substrate. Fluid Dyn 42, 978–986 (2007). https://doi.org/10.1134/S0015462807060130
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DOI: https://doi.org/10.1134/S0015462807060130