Bubble Dynamics and Cavitation

Plesset, Milton S.; Prosperetti, Andréa

doi:10.1146/annurev.fl.09.010177.001045

Cited by 1,746 publications

(1,011 citation statements)

References 55 publications

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“…The accumulated knowledge of this nonlinear behavior has been summarized in many reviews [18][19][20] and papers [1,[21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36]. The most important findings are the existence of period-doubling cascades in the bifurcation structure [1,21,30,31,35], the appearance of resonance horns in the amplitude-frequency plane of the driving [24,27,34] or the alternation of chaotic and periodic windows [21,23,33].…”

Section: Introductionmentioning

confidence: 99%

Classification of the bifurcation structure of a periodically driven gas bubble

Varga

Hegedűs

2016

Nonlinear Dyn

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The bifurcation structure of a periodically driven spherical gas/vapour bubble is examined by means of methods of nonlinear analysis. The study of Behnia and his coworkers [1] revealed that the bifurcation structures with the pressure amplitude of the excitation as control parameter are structurally similar provided that R E ω is kept constant. In the present paper, this problem is revisited. Analytical and numerical investigations of the bubble oscillator, which is the Keller-Miksis equation, are presented. It is shown that the validity range of Behnia's condition is governed by the viscosity and the surface tension, and holds only for relatively large bubbles. In water, the effect of viscosity is negligible, and the surface tension plays significant role at bubble size lower than approximately 5 µm.

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Section: Introductionmentioning

confidence: 99%

Classification of the bifurcation structure of a periodically driven gas bubble

Varga

Hegedűs

2016

Nonlinear Dyn

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“…i p and p ∞ are the pressures in the bubble and at infinity and they may be functions of the time t. σ, μ and ρ are the surface tension constant, the coefficient of the liquid viscosity and the liquid density, respectively. It has been known that the periodic perturbation in the environmental pressure p ∞ can cause the bubble oscillation [37]. From the pressure measurement shown in Figure 7, it is understood that the pressure in the bubble p i is non-linearly oscillated, which certainly brings about the bubble oscillation.…”

Section: Discussion On the Flow Fieldmentioning

confidence: 97%

“…An underwater supersonic gas jet is more like as a "gas bag" enclosed by the surrounding water. In accordance with the Rayleigh-Plesset equation [37]:…”

Section: Discussion On the Flow Fieldmentioning

confidence: 99%

Research on the mechanics of underwater supersonic gas jets

Shi

Wang

Dai

2010

Sci. China Phys. Mech. Astron.

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An experimental research was carried out to study the fluid mechanics of underwater supersonic gas jets. High pressure air was injected into a water tank through converging-diverging nozzles (Laval nozzles). The jets were operated at different conditions of over-, full-and under-expansions. The jet sequences were visualized using a CCD camera. It was found that the injection of supersonic air jets into water is always accompanied by strong flow oscillation, which is related to the phenomenon of shock waves feedback in the gas phase. The shock wave feedback is different from the acoustic feedback when a supersonic gas jet discharges into open air, which causes screech tone. It is a process that the shock waves enclosed in the gas pocket induce a periodic pressure with large amplitude variation in the gas jet. Consequently, the periodic pressure causes the jet oscillation including the large amplitude expansion. Detailed pressure measurements were also conducted to verify the shock wave feedback phenomenon. Three kinds of measuring methods were used, i.e., pressure probe submerged in water, pressure measurements from the side and front walls of the nozzle devices respectively. The results measured by these methods are in a good agreement. They show that every oscillation of the jets causes a sudden increase of pressure and the average frequency of the shock wave feedback is about 5-10 Hz. underwater supersonic gas jet, pressure oscillation, flow visualization, shock wave feedback PACS: 47.55.Ca, 47.27.wg

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“…It is well known that when a gaseous bubble is periodically excited by an acoustic or temperature field, the bubble shrinks and expands as the oscillating wave of the pressure or temperature passes the bubble. Here, the high frequency oscillation generates a unidirectional, non-zero, time-averaged velocity component, which is called "micro streaming" [41]. The micro streaming flows have been applied to micropumps or micromixers [42,43].…”

Section: Propulsion By Bubblesmentioning

confidence: 99%

Mini and Micro Propulsion for Medical Swimmers

Feng

Cho

2014

Micromachines

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Mini and micro robots, which can swim in an underwater environment, have drawn widespread research interests because of their potential applicability to the medical or biological fields, including delivery and transportation of bio-materials and drugs, bio-sensing, and bio-surgery. This paper reviews the recent ideas and developments of these types of self-propelling devices, ranging from the millimeter scale down to the micro and even the nano scale. Specifically, this review article makes an emphasis on various propulsion principles, including methods of utilizing smart actuators, external magnetic/electric/acoustic fields, bacteria, chemical reactions, etc. In addition, we compare the propelling speed range, directional control schemes, and advantages of the above principles.

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Bubble Dynamics and Cavitation

Cited by 1,746 publications

References 55 publications

Classification of the bifurcation structure of a periodically driven gas bubble

Classification of the bifurcation structure of a periodically driven gas bubble

Research on the mechanics of underwater supersonic gas jets

Mini and Micro Propulsion for Medical Swimmers

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