Abstract
This paper studies thermocapillary vortices induced by local heating of a bubble surface in a Hele-Shaw cell by a light beam. It is found that the vortex rotation frequency and its depth depend on the distance from the light-beam projection onto the layer to the bubble boundary. The surface velocity of the thermocapillary flow is calculated using the balance of the near-surface and return flows of the thermocapillary vortex and the equality of capillary and dynamic pressures. It is shown that a decrease in the surface velocity and the vortex rotation frequency with increase in the distance from the light beam to the bubble surface is due to a decrease in the temperature gradient between the illuminated and cold poles of the bubble.
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Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 46, No. 5, pp. 93–99, September–October, 2005.
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Ivanova, N.A., Bezuglyi, B.A. Thermocapillary Vortices Induced by a Light Beam near a Bubble Surface in a Hele-Shaw Cell. J Appl Mech Tech Phys 46, 691–696 (2005). https://doi.org/10.1007/s10808-005-0125-2
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DOI: https://doi.org/10.1007/s10808-005-0125-2