Bubble pulsation characteristics in multi-bubble systems affected by bubble size polydispersity and spatial structure

Zou, Qingqin; Zhong, Xianhua; Zhang, Bingyu; Gao, An; Wang, Xia; Li, Zhangyong; Qin, Dui

doi:10.1016/j.ultras.2023.107089

Cited by 5 publications

(4 citation statements)

References 61 publications

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“…The above factors jointly determine the degree of chemical reactions and the yield of free radicals inside the bubble. After cavitation formation, the bubble-bubble interaction is not neglected and has significant effects on the bubble dynamics, such as sonoluminescence [48] and bubble pulsation characteristics [49]. However, the single bubble yieldis still worth studying, which together with the number of active bubbles under numerical and experimental conditions determines the chemical activity [5].…”

Section: Resultsmentioning

confidence: 99%

“…The corresponding overall production rate of the free radical can be obtained by multiplying the single bubble yield with the number of bubbles. In order to apply dual-frequency excitation to the reactor scale, the effects of bubble-bubble interactions [16,48,49], wave propagation [50], etc., on the chemical products within a single bubble should be considered in the future studies.…”

Section: Resultsmentioning

confidence: 99%

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Numerical investigation of sonochemical production in a single bubble under dual-frequency acoustic excitation

Lv,

Liu

2023

Phys. Scr.

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A numerical computation study about sonochemical activity of an oxygen bubble oscillations in a dual-frequency acoustic field is presented in this paper. The variation of excitation frequency causes the change of magnitude and duration of pressure acting on the bubble, affecting the instantaneous bubble radius, internal bubble temperature as well as chemical reactions. The numerical results indicate the formation of O2, HO2•, •OH, H•, O, H2 and H2O2 in an O2 bubble during collapse phase. The main oxidant is •OH radical. The influence of several parameters (e.g. couples of frequencies, the total pressure amplitude and the ratio of pressure amplitudes of the two waves) on the molar yields of the oxidants is analyzed. There is an optimum bubble collapse temperature (around 5648 K) for the •OH production. Moreover, the corresponding frequency intervals of enhanced effect and weakened effect under different coupled frequencies (i.e. 40, 140, 213, 355 and 515 kHz) are also investigated.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Numerical investigation of sonochemical production in a single bubble under dual-frequency acoustic excitation

Lv,

Liu

2023

Phys. Scr.

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“…However, in practical applications, the sizes of cavitation bubbles are polydisperse, and different initial radii of bubbles have different effects on surrounding bubbles. [29] In addition, the translation and non-spherical oscillation of the bubbles are also ignored. [36] In the future, we will continue to optimize the model and investigate the effects of translation, non-sphericity, and size polydispersity of the bubble.…”

Section: Discussionmentioning

confidence: 99%

“…Qin et al [28] compared the amplitude and nonlinearity of the bubble oscillation without and with the inter-bubble interaction, and found that the interaction between bubbles can enhance or suppress the amplitude and nonlinearity of the bubbles' oscillation. Zou et al [29] analyzed the effects of the size polydispersity and two-dimensional (2D) structure of bubbles on bubble pulsation characteristics in a three-bubble system. Despite the fact that some of these studies established multi-bubble models, they did not consider mass exchange between the inside and outside of the cavitation bubble nor the interaction between neighboring bubbles.…”

Section: Introductionmentioning

confidence: 99%

Dynamic modeling of cavitation bubble clusters: Effects of evaporation, condensation, and bubble–bubble interaction

Xu 许,

Yao 姚,

Shen 沈

2024

Chinese Phys. B

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In this article, we present a dynamic model of cavitation bubbles in a cluster that considers the effect of evaporation, condensation, and bubble to bubble interactions. Under different ultrasound conditions, we examine how the dynamics of cavitation bubbles are affected by several factors, such as the location of the bubbles, the ambient radius, and the number of bubbles. This investigation includes analyzing alterations in bubble radius, energy, temperature, pressure, and the quantity of vapor molecules. Our findings reveal that bubble-bubble interactions can restrict the expansion of bubbles, reduce the exchange of energy and vapor molecules, and diminish the maximum internal temperature and pressure upon bursting. The ambient radius of bubbles can influence the intensity of their oscillations, with clusters comprising smaller bubbles creating optimal conditions for generating high-temperature and high-pressure regions. Moreover, an increase in the number of bubbles can further inhibit cavitation activities. The frequency, pressure and waveform of the driving wave also have a significant impact on cavitation activities, with rectangular waves enhancing and triangular waves weakening the cavitation of bubbles in the cluster. These results provide a theoretical basis for understanding the dynamics of cavitation bubbles within a bubble cluster, and the factors that affect their behavior.

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Influence of the liquid ionic strength on the resonance frequency and shell parameters of lipid-coated microbubbles

Sojahrood,

Yang,

Counil

et al. 2024

Journal of Colloid and Interface Science

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Bubble pulsation characteristics in multi-bubble systems affected by bubble size polydispersity and spatial structure

Cited by 5 publications

References 61 publications

Numerical investigation of sonochemical production in a single bubble under dual-frequency acoustic excitation

Numerical investigation of sonochemical production in a single bubble under dual-frequency acoustic excitation

Dynamic modeling of cavitation bubble clusters: Effects of evaporation, condensation, and bubble–bubble interaction

Influence of the liquid ionic strength on the resonance frequency and shell parameters of lipid-coated microbubbles

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