標題: Exploration of water jet generated by Q-switched laser induced water breakdown with different depths beneath a flat free surface
作者: Chen, Ross C. C.
Yu, Y. T.
Su, K. W.
Chen, J. F.
Chen, Y. F.
電子物理學系
Department of Electrophysics
公開日期: 14-一月-2013
摘要: The dynamics of a water jet on a flat free surface are investigated using a nanosecond pulsed laser for creating an oscillating bubble with different depths beneath the free surface. A thin jet is shown to deform a crater surface resulted from surface depression and cause a circular ring-shaped crater on the connection surface between the crater of surface depression and the thin jet. The collapse of this circular ring-shaped crater is proposed to the crown-like formation around a thick jet. The evolution of the bubble depth suggests a classification of four distinctive ranges of the bubble depths: non-crown formation when the parameter of bubble depth over the maximum bubble radius gamma <= 0.5, unstable crown formation when 0.5 <= gamma <= 0.6, crown-like structure with a complete crown wall when 0.6 <= gamma <= 1.1, and non-crown formation when 1.1 <= gamma. Furthermore, the orientation of the crown wall gradually turns counterclockwise to vertical direction with increasing gamma from 0.5 to 1.1, implying a high correlation between the orientation of the crown wall and the depth of the bubble. This correlation is explained and discussed by the directional change of the jet eruption from the collapse of circular ring-shaped crater. (C)2013 Optical Society of America
URI: http://dx.doi.org/10.1364/OE.21.000445
http://hdl.handle.net/11536/21463
ISSN: 1094-4087
DOI: 10.1364/OE.21.000445
期刊: OPTICS EXPRESS
Volume: 21
Issue: 1
起始頁: 445
結束頁: 453
顯示於類別:期刊論文


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  1. 000315988100069.pdf