Shock Wave Interaction with Single Bubbles and Bubble Clouds

Ohl, Claus‐Dieter; Ohl, Siew-Wan

doi:10.1007/978-3-642-34297-4_1

Cited by 9 publications

(6 citation statements)

References 77 publications

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“…On the one hand, the concave surface affects the fluid flow caused by the oscillatory motion of the CB differently than the flat surface [42] but what is often neglected, the boundary also reflects the BSW back towards the CB. The reflected BSW interacts with the CB, in many circumstances forcing it to a faster collapse [43] . The extent to which the SW disturbs the cavities depends on the duration and amplitude of the positive and negative phase of the SW, bubble size and its phase within the oscillation period [44] , [45] .…”

Section: Resultsmentioning

confidence: 99%

Laser-induced cavitation bubbles and shock waves in water near a concave surface

Požar

Agrež

Petkovšek

2021

Ultrasonics Sonochemistry

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Section: Resultsmentioning

confidence: 99%

Laser-induced cavitation bubbles and shock waves in water near a concave surface

Požar

Agrež

Petkovšek

2021

Ultrasonics Sonochemistry

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“…Pressure transients in the form of a shock wave is a type of pressure field distortion that leads to the strong collapse of a bubble. A review of works pertaining to the interaction of bubbles with shock waves in a liquid medium was given by Ohl & Ohl (2013).…”

Section: Shock-induced Collapse Of a Single Bubblementioning

confidence: 99%

Energy focusing in shock-collapsed bubble arrays

Bempedelis

Ventikos

2020

J. Fluid Mech.

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“…[10][11][12] We now put a focus on cavitation inception that results from shock-bubble interaction. [13][14][15] Underwater shockwave interacts with air-water interfaces such as bubbles and reflects as a tension wave due to acoustic impedance mismatching; this tension may in principle induce cavitation bubble nucleation. Ando, Liu, and Ohl 16 developed an optical visualization system to observe underwater shock events with nanosecond laser pulses and studied cavitation bubble nucleation that results from interaction between laser-induced shocks and air-water interfaces in a microchannel.…”

Section: Introductionmentioning

confidence: 99%

Cavitation bubble nucleation induced by shock-bubble interaction in a gelatin gel

Oguri

Ando

2018

Physics of Fluids

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An optical visualization technique is developed to study cavitation bubble nucleation that results from interaction between a laser-induced shock and a preexisting gas bubble in a 10 wt% gelatin gel; images of the nucleated cavitation bubbles are captured and the cavitation inception pressure is determined based on Euler flow simulation. A spherical gas cavity is generated by focusing an infrared laser pulse into a gas-supersaturated gel and the size of the laser-generated bubble in mechanical equilibrium is tuned via mass transfer of the dissolved gas into the bubble. A spherical shock is then generated, through rapid expansion of plasma induced by the laser focusing, in the vicinity of the gas bubble. The shock-bubble interaction is recorded by a CCD camera with flash illumination of a nanosecond green laser pulse. The observation captures cavitation inception in the gel under tension that results from acoustic impedance mismatching at the bubble interface interacting with the shock. We measure the probability of cavitation inception from a series of the repeated experiments, with varying the bubble radius and the standoff distance. The threshold pressure is defined at the cavitation inception probability equal to one half and is calculated, through comparisons to Euler flow simulation, at −24.4 MPa. This threshold value is similar to that from shock-bubble interaction experiments using water, meaning that viscoelasticity of the 10 wt% genatin gel has a limited impact on bubble nucleation dynamics.

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Shock Wave Interaction with Single Bubbles and Bubble Clouds

Cited by 9 publications

References 77 publications

Laser-induced cavitation bubbles and shock waves in water near a concave surface

Laser-induced cavitation bubbles and shock waves in water near a concave surface

Energy focusing in shock-collapsed bubble arrays

Cavitation bubble nucleation induced by shock-bubble interaction in a gelatin gel

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