The role of ‘splashing’ in the collapse of a 
laser-generated cavity near a rigid boundary

Tong, R. P.; Schiffers, W. P.; Shaw, Stephen J.; Blake, J. R.; Emmony, D. C.

doi:10.1017/s0022112098003589

Cited by 165 publications

(100 citation statements)

References 32 publications

(52 reference statements)

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“…In addition, multibubble applications always have to deal with the interaction of bubbles with boundaries, be they hard (as in materials science) or soft (as in biological and medical contexts). With the experimental observation and numerical simulation of jet cavitation in bubble collapses near a wall by Lauterborn (1988a, 1988b), Vogel et al (1989), Tomita and Shima (1990), Blake et al (1997), Philipp and Lauterborn (1997), Lauterborn and Ohl (1998), Blake et al (1998Blake et al ( , 1999, Tong et al (1999), Brujan et al (2001aBrujan et al ( , 2001b, research in this complex area has only just begun.…”

Section: E Multibubble Fields: In Search Of a Theorymentioning

confidence: 99%

Single-bubble sonoluminescence

2002

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Single-bubble sonoluminescence occurs when an acoustically trapped and periodically driven gas bubble collapses so strongly that the energy focusing at collapse leads to light emission. Detailed experiments have demonstrated the unique properties of this system: the spectrum of the emitted light tends to peak in the ultraviolet and depends strongly on the type of gas dissolved in the liquid; small amounts of trace noble gases or other impurities can dramatically change the amount of light emission, which is also affected by small changes in other operating parameters (mainly forcing pressure, dissolved gas concentration, and liquid temperature). This article reviews experimental and theoretical efforts to understand this phenomenon. The currently available information favors a description of sonoluminescence caused by adiabatic heating of the bubble at collapse, leading to partial ionization of the gas inside the bubble and to thermal emission such as bremsstrahlung. After a brief historical review, the authors survey the major areas of research: Section II describes the classical theory of bubble dynamics, as developed by Rayleigh, Plesset, Prosperetti, and others, while Sec. III describes research on the gas dynamics inside the bubble. Shock waves inside the bubble do not seem to play a prominent role in the process. Section IV discusses the hydrodynamic and chemical stability of the bubble. Stable single-bubble sonoluminescence requires that the bubble be shape stable and diffusively stable, and, together with an energy focusing condition, this fixes the parameter space where light emission occurs. Section V describes experiments and models addressing the origin of the light emission. The final section presents an overview of what is known, and outlines some directions for future research. CONTENTS

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Section: E Multibubble Fields: In Search Of a Theorymentioning

confidence: 99%

Single-bubble sonoluminescence

2002

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“…The interaction of a bubble with its environment generically establishes an asymmetry that, for strong interaction, leads to jet formation, whereby the bubble pierces itself with a high-speed liquid jet. In the case of a bubble collapsing in a stationary liquid near a solid boundary, the jet is directed towards the boundary and reaches velocities of the order of 100 m s −1 (Benjamin & Ellis 1966;Plesset & Chapman 1971;Lauterborn & Bolle 1975;Blake, Taib & Doherty 1986;Tomita & Shima 1986;Blake & Gibson 1987;Vogel, Lauterborn & Timm 1989;Zhang, Duncan & Chahine 1993;Shaw et al 1996;Tong et al 1999;Brujan et al 2002;Popinet & Zaleski 2002;Lindau & Lauterborn 2003;Johnsen & Colonius 2009;Ochiai et al 2011). Jet formation is also observed with bubbles compressed by a shock wave (Bowden 1966;Dear, Field & Walton 1988;Bourne & Field 1992Antkowiak et al 2007;Hawker & Ventikos 2012).…”

mentioning

confidence: 98%

Dynamics of laser-induced bubble pairs

et al. 2015

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The interaction of two laser-induced bubbles in bulk water is investigated. The strength and direction of the emerging liquid jets can be controlled by adjusting the relative bubble positions, the time difference between bubble generation, and the laser pulse energies determining the bubble sizes. Experimental and numerical studies are performed for millimetre-sized bubble pairs. Taking bubbles of equal energy, a maximum jet velocity is found for close anti-phase bubbles, i.e. when the second bubble is produced at the maximum volume of the first one and the bubble walls are almost touching and not merging. Under these conditions, one bubble produces a fast jet with a peak velocity of about 150 m s −1 that reaches a distance into the surrounding liquid of at least three times the maximum bubble radius. Collapse of the other bubble results in a slow jet of large mass that rapidly converts into a ring vortex. Correspondingly, the interaction with adjacent structures is dominated either by localized jet impact or by shear stresses extending over a larger area. Furthermore, interactions between micrometre-sized bubble pairs are investigated numerically to understand and predict how the effects of the physical parameters on bubble dynamics would change when the bubbles become smaller. The results are discussed with respect to micropumping and opto-injection.

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“…The maximum pressure recorded varies from nearly 7 GPa for ζ = 1.0625 to a mere 0.5 GPa for ζ = 2.125. It would be a likely candidate to assess for the generation of at least surface damage on a nearby surface, although full assessment of all possible contributions to damage is beyond the scope of this article (Philipp & Lauterborn 1998;Tong et al 1999;Eisenmenger 2001;Zhong et al 2001;Zhu et al 2002;Birkin et al 2005a;Calvisi et al 2007Calvisi et al , 2008Klaseboer et al 2007;Sapozhnikov et al 2007;Iloreta et al 2008;Lauterborn & Kurz 2010;Vian et al 2010).…”

Section: Lithotripter Shock-bubble Interaction Near a Rigid Wallmentioning

confidence: 99%

“…The link between these and damage is made through empirical observation of patients (Leighton et al 2008c), and there is no intention here of linking the calculated pressure and flow fields to damage. The search for such a direct linkage is subject to an ongoing and intensive international research effort (Philipp & Lauterborn 1998;Tong et al 1999;Eisenmenger 2001;Zhong, Zhou & Zhu 2001;Zhu et al 2002;Birkin et al 2005a;Calvisi et al 2007;Klaseboer et al 2007;Sapozhnikov et al 2007;Calvisi, Iloreta & Szeri 2008;Iloreta, Fung & Szeri 2008;Lauterborn & Kurz 2010). To be clinically relevant, the output of such research would require challenging extrapolation to clinical tissue from the materials used in laboratory experiments or simulations (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…BEM has been an extremely popular method in bubble dynamics simulations (Blake et al 1986(Blake et al , 1997Tong et al 1999;Fong et al 2006;Klaseboer et al 2006;Turangan et al 2006). Although the model assumes that the liquid phase is incompressible and the scalar properties of the gas are spatially uniform, Klaseboer et al (2006Klaseboer et al ( , 2007 have shown that with some assumptions, BEM is still applicable to limited applications of shock-bubble interaction.…”

Section: Introductionmentioning

confidence: 99%

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The collapse of single bubbles and approximation of the far-field acoustic emissions for cavitation induced by shock wave lithotripsy

et al. 2011

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Recent clinical trials have shown the efficacy of a passive acoustic device used during shock wave lithotripsy (SWL) treatment. The device uses the far-field acoustic emissions resulting from the interaction of the therapeutic shock waves with the tissue and kidney stone to diagnose the effectiveness of each shock in contributing to stone fragmentation. This paper details simulations that supported the development of that device by extending computational fluid dynamics (CFD) simulations of the flow and near-field pressures associated with shock-induced bubble collapse to allow estimation of those far-field acoustic emissions. This is a required stage in the development of the device, because current computational resources are not sufficient to simulate the far-field emissions to ranges of O(10 cm) using CFD. Similarly, they are insufficient to cover the duration of the entire cavitation event, and here simulate only the first part of the interaction of the bubble with the lithotripter shock wave in order to demonstrate the methods by which the far-field acoustic emissions resulting from the interaction can be estimated. A free-Lagrange method (FLM) is used to simulate the collapse of initially stable air bubbles in water as a result of their interaction with a planar lithotripter shock. To estimate the far-field acoustic emissions from the interaction, this paper developed two numerical codes using the Kirchhoff and Ffowcs William-Hawkings (FW-H) formulations. When coupled to the FLM code, they can be used to estimate the far-field acoustic emissions of cavitation events. The limitation of the technique is that it assumes that no significant nonlinear acoustic propagation occurs outside the control surface. Methods are outlined for ameliorating this problem if, as here, computational resources cannot compute the flow field to sufficient distance, although for the clinical situation discussed, this limitation is tempered by the effect of tissue absorption, which here is incorporated through the standard derating procedure. This approach allowed identification of the sources of, and explanation of trends seen in, the characteristics of the far-field emissions observed in clinic, to an extent that was sufficient for the development of this clinical device.

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The role of ‘splashing’ in the collapse of a laser-generated cavity near a rigid boundary

Cited by 165 publications

References 32 publications

Single-bubble sonoluminescence

Single-bubble sonoluminescence

Dynamics of laser-induced bubble pairs

The collapse of single bubbles and approximation of the far-field acoustic emissions for cavitation induced by shock wave lithotripsy

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