N. A. Ivanova and B. A. Bezuglyi
Tyumen State University, ul. Semakova 10, Tyumen, 625003 Russia
Received February 19, 2007
Abstract—Droplet growth in thin layers of water–alcohol solutions under the effect of a concentration-induced
capillary flow, which is governed by a laser electromagnetic radiation, is investigated. It is established that an
increase in water concentration in a solution accelerates the droplet growth. In low-concentrated solutions, a
droplet may reach a quasi-steady state, in which its diameter is no larger than the diameter of the light beam
projection onto the layer. A rise in the radiation power above an optimal magnitude decelerates the droplet
growth. In low-concentrated solutions, this deceleration results from a decrease in the flow that feeds the drop-
let, while in high-concentrated solutions, it is due to a droplet constriction and an increase in its curvature
radius.
DOI: 10.1134/S1061933X07060099
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