Mechanism of high velocity jet formation after a gas bubble collapse near the micro fiber immersed in a liquid

被引：27

作者：

Fursenko, Roman, V ^{[1
,2
]}

Chudnovskii, Vladimir M. ^{[3
]}

Minaev, Sergey S. ^{[2
]}

Okajima, Junnosuke ^{[2
,4
]}

机构：

[1] Russian Acad Sci, Khristianovich Inst Theoret & Appl Mech, Siberian Branch, Inst Skaya Str 4-1, Novosibirsk 630090, Russia

[2] Russian Acad Sci, Inst Appl Math, Far Eastern Branch, Radio Str 8, Vladivostok 690041, Russia

[3] Russian Acad Sci, Ilichev Pacific Oceanol Inst, Far Eastern Branch, Baltiyskaya Str 43, Vladivostok 690041, Russia

[4] Tohoku Univ, Inst Fluid Sci, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2020年 / 163卷

关键词：

Two-phase flow; Condensation; Bubble collapse; High velocity cumulative jet; Laser surgery; SUBCOOLED WATER; LASER; FLOW; DYNAMICS;

D O I：

10.1016/j.ijheatmasstransfer.2020.120420

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Numerical simulations of the vapor bubble collapse near the micro fiber immersed in a subcooled liquid allow us to propose the mechanism of formation of high velocity liquid jet previously observed in experiments. It is shown that spherical symmetry breaking of the velocity field near the fiber creates axisymmetric radially converged water flow resulting in appearance of the cumulative jet. Numerical simulations demonstrate that physical mechanism of jet formation is mainly determined by bubble surface dynamic and is irrespective to the processes driving bubble shrinking. Dependency of the jet velocity on time as well as effect of fiber thickness and initial vapor bubble radius on jet intensity are studied. It is found that optimal fiber thickness at which the jet is the most powerful exists. This optimal value is not universal but depends on initial vapor bubble radius. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：9

共 33 条

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