Study of growth and subsequent collapse of a vapor bubble formed as a result of underheated liquid exposure to laser radiation
A.A. Chernov1,2, A.A. Levin1,3, T.P. Adamova1,4
1Novosibirsk State University, Novosibirsk, Russia
2Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
3Melentiev Energy Systems Institute SB RAS, Irkutsk, Russia
4Nikolaev Institute of Inorganic Chemistry SB RAS, Novosibirsk, Russia
Abstract
The object of an experimental study is a vapor bubble formed in a subcooled liquid as a result of absorption of laser radiation transmitted into the working volume through a thin optical fiber. Evolution of a bubble is characterized by its rapid growth and collapse with generation of a hot submerged jet. Some features of the process under study are considered in relation to the field of medicine. Normal saline is used as the working fluid. It is shown that under the same conditions (radiation power, optical fiber diameter, and initial temperature of liquid), the dimensions reached by a vapor bubble in saline solution are much smaller than those in pure water. A significant influence of the shape of a fiber tip on the nature of the process under study was revealed.
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