Theoretical study of single-bubble sonochemistry

Yasui, Kyuichi; Tuziuti, Toru; Manickam, Sivakumar; Iida, Yasuo

doi:10.1063/1.1925607

Cited by 160 publications

(193 citation statements)

References 70 publications

(87 reference statements)

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“…[5][6][7][8][9][10][11] The validity of different models based on the RP equations accounting for compressibility effects has been discussed. [12][13][14][15] Moreover, these studies are focused on the bubble interior behavior.…”

Section: Introductionmentioning

confidence: 99%

Liquid compressibility effects during the collapse of a single cavitating bubble

Fuster

Dopazo

Hauke

2011

The Journal of the Acoustical Society of America

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The effect of liquid compressibility on the dynamics of a single, spherical cavitating bubble is studied. While it is known that compressibility damps the amplitude of bubble rebounds, the extent to which this effect is accurately captured by weakly compressible versions of the Rayleigh-Plesset equation is unclear. To clarify this issue, partial differential equations governing conservation of mass, momentum, and energy are numerically solved both inside the bubble and in the surrounding compressible liquid. Radiated pressure waves originating at the unsteady bubble interface are directly captured. Results obtained with Rayleigh-Plesset type equations accounting for compressibility effects, proposed by Keller and Miksis [J. Acoust. Soc. Am. 68, 628-633 (1980)], Gilmore, and Tomita and Shima [Bull. JSME 20, 1453-1460], are compared with those resulting from the full model. For strong collapses, the solution of the latter reveals that an important part of the energy concentrated during the collapse is used to generate an outgoing pressure wave. For the examples considered in this research, peak pressures are larger than those predicted by Rayleigh-Plesset type equations, whereas the amplitudes of the rebounds are smaller.

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Section: Introductionmentioning

confidence: 99%

Liquid compressibility effects during the collapse of a single cavitating bubble

Fuster

Dopazo

Hauke

2011

The Journal of the Acoustical Society of America

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“…The model uses the Rayleigh-Plesset equation [16], modified to include the compressibility effects and mass transfer processes [12], to approximate the liquid continuity and momentum equations. This equation has been widely used by other authors to describe the liquid behavior [15,18,23,27].…”

Section: Case Studymentioning

confidence: 97%

Parametric Analysis for a Single Collapsing Bubble

Fuster

Hauke

Dopazo

2008

Flow Turbulence Combust

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This work presents a sensitivity analysis for cavitation processes, studying in detail the effect of various model parameters on the bubble collapse. A complete model (Hauke et al. Phys Rev E 75:1-14, 2007) is used to obtain how different parameters influence the collapse in SBSL experiments, providing some clues on how to enhance the bubble implosion in real systems. The initial bubble radius, the frequency and the amplitude of the pressure wave are the most important parameters determining under which conditions cavitation occurs. The range of bubble sizes inducing strong implosions for different frequencies is computed; the initial radius is the most important parameter characterized the intensity of the cavitation processes. However, other parameters like the gas and liquid conductivity or the liquid viscosity can have an important effect under certain conditions. It is shown that mass transfer processes play an important role in order to correctly predict the trends related with the effect of the liquid temperature, which translates into the bubble dynamics. Moreover, under some particular circumstances, evaporation can be encountered during the bubble collapse; this can be profitably exploited in order to feed reactants when the most extreme conditions inside the bubbles are reached. Thus, this paper aims at providing a global assessment of the effect of the different parameters on the entire cycle of a single cavitating spherical bubble immersed in an ultrasonic field.

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“…Equations 1-3 are comparatively lower energy pathways compared with Equation 4 [10]. This means that radical production will occur even with low bubble collapse temperatures.…”

Section: Chemical Effects Of Ultrasoundmentioning

confidence: 99%