Dynamics of Laser-Induced Cavitation Bubble near Solid Boundary
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概要
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The dynamics of a laser-induced cavitation bubble created near solid boundary is investigated using a new force sensor together with a hydrophone. The experimental results indicate that liquid-jet formation and acoustic transient emission are general features of bubble dynamics; liquid-jet formation occurs earlier than that of the acoustic transient. A comparison of the liquid jet energy and acoustic energy reveals that the acoustic transient, rather than the liquid jet, plays a vital role in the damping mechanism during the second collapse for $\gamma=0.75$ ($\gamma=L/R_{\text{max}}$, where $R_{\text{max}}$ being the maximum bubble radius and $L$ denoting the distance of the cavity inception from the boundary); moreover, the amplitudes of acoustic transients and liquid jet versus the nondimensional distance $\gamma$ are also derived, which are valuable in hydraulic cavitation, laser lithotripsy and laser ophthalmology.
- 2008-07-25
著者
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Lu Jian
Department Of Applied Physics Nanjing University Of Science And Technology
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Ni Xiao-wu
Department Of Applied Physics Nanjing University Of Science And Technology
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Zhao Rui
Center For Molecular Science Institute Of Chemistry Chinese Academy Of Sciences
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Zhao Rui
Center for Optofluidic Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
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Liang Zhong-cheng
Center for Optofluidic Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
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Ni Xiao-wu
Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, China
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Xu Rong-qing
College of Optoelectronic Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
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