Analysis of dynamic acoustic resonance effects in a sonicated gas–liquid flow microreactor

Cailly, William; Carogher, Keiran Mc; Bolze, Holger; Yin, Jun; Kuhn, Simon

doi:10.1016/j.ultsonch.2023.106300

Cited by 3 publications

(13 citation statements)

References 47 publications

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“…The link between atomisation bursts and acoustic deformation was also observed experimentally by Simon et al (2015) and Wang et al (2022). Furthermore, Cailly et al (2023) found that in sonicated gas-liquid segmented flow atomisation coincides with a strong concave deformation of a bubble. Therefore, we conclude that dynamic acoustic resonance is the main mechanism driving both the drop-chain growth of the liquid and atomisation.…”

Section: Discussionsupporting

confidence: 65%

“…To estimate the atomisation threshold we performed volume of fluid (VOF) simulations as described in our previous work (Cailly et al. 2023), and additional details are provided in the Appendix C. Atomisation is defined at the point where breakup is observed for a free surface vibrating at a given driving amplitude and frequency, and the obtained atomisation threshold is m.…”

Section: Resultsmentioning

confidence: 99%

“…It has been shown that these phenomena, including transient bubble deformation and oscillation, are activated by acoustic resonance between bubbles (Cailly et al. 2023).…”

Section: Introductionmentioning

confidence: 99%

“…In our previous work, we also addressed the relevance of a numerical approach based on predicting and updating the driving acoustic field with respect to the moving surface and its applicability to the complex acoustic deformation of a gas–liquid interface (Cailly et al. 2023). The specific behaviour of these gas–liquid–acoustic systems is based on the nonlinear nature of the involved mechanisms.…”

Section: Introductionmentioning

confidence: 99%

“…This is also highlighted by the shadowgraphy experiments of Tomita (2014) which qualitatively show how the pattern of the standing acoustic wave changes with the deformation of the liquid surface. In our previous work, we also addressed the relevance of a numerical approach based on predicting and updating the driving acoustic field with respect to the moving surface and its applicability to the complex acoustic deformation of a gas-liquid interface (Cailly et al 2023). The specific behaviour of these gas-liquid-acoustic systems is based on the nonlinear nature of the involved mechanisms.…”

mentioning

confidence: 99%

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Numerical analysis of dynamic acoustic resonance with deformed liquid surfaces: the acoustic fountain

Cailly,

Yin,

Kuhn

2023

J. Fluid Mech.

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Applying a focused ultrasonic field on a free liquid surface results in its growth eventually leading to the so-called acoustic fountain. In this work, a numerical approach is presented to further increase the understanding of the acoustic fountain phenomenon. The developed simulation method enables the prediction of the free surface motion and the dynamic acoustic field in the moving liquid. The dynamic system is a balance between inertia, surface tension and the acoustic radiation force, and its nonlinearity is demonstrated by studying the relation between the ultrasonic excitation amplitude and corresponding liquid deformation. We show that dynamic resonance is the main mechanism causing the specific acoustic fountain shapes, and the analysis of the dynamic acoustic pressure allows us to predict Faraday-instability atomisation. We show that strong resonance peaks cause atomisation bursts and strong transient deformations corresponding to previously reported experimental observations. The quantitative prediction of the dynamic acoustic pressure enables us to assess the potential of cavitation generation in acoustic fountains. The observed local high acoustic pressures above both the cavitation and the atomisation threshold hint at the coexistence of these two phenomena in acoustic fountains.

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Section: Discussionsupporting

confidence: 65%

Section: Resultsmentioning

confidence: 99%

“…It has been shown that these phenomena, including transient bubble deformation and oscillation, are activated by acoustic resonance between bubbles (Cailly et al. 2023).…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Numerical analysis of dynamic acoustic resonance with deformed liquid surfaces: the acoustic fountain

Cailly,

Yin,

Kuhn

2023

J. Fluid Mech.

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Synchrotron X-ray phase-contrast imaging of ultrasonic drop atomization

Prasanna,

Biasiori-Poulanges,

et al. 2024

International Journal of Multiphase Flow

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Simulation of Capillary Wave Turbulence on the Basis of Fully Nonlinear Plane-Symmetric Model

Kochurin,

Zubareva,

Gashkov

2024

Interfac Phenom Heat Transfer

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A new model for the direct numerical simulation of capillary wave turbulence arising at a free surface of deep incompressible fluid is proposed in the work. The plane-symmetric model based on the time-dependent conformal transform is fully nonlinear and takes into account the effects of surface tension, external random forcing and dissipation of energy. The simulation results show that the system of nonlinear capillary waves can go into a quasi-stationary state (wave turbulence regime), when the action of an external force is compensated by the viscosity. In this regime, the fluid motion demonstrates quite complex and irregular behavior. The spatial and frequency spectra of surface perturbations acquire a power-law dependence in the quasi-stationary state. The exponents of the spectra do not coincide with the classical Zakharov-Filonenko spectrum obtained for isotropic capillary turbulence. In the case of anisotropic quasi-1D geometry, five-wave resonant interactions become the dominant process. The numerical results agree with high accuracy with the corresponding analytical spectra obtained on the basis of dimensional analysis of weak turbulence spectra.

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Analysis of dynamic acoustic resonance effects in a sonicated gas–liquid flow microreactor

Cited by 3 publications

References 47 publications

Numerical analysis of dynamic acoustic resonance with deformed liquid surfaces: the acoustic fountain

Numerical analysis of dynamic acoustic resonance with deformed liquid surfaces: the acoustic fountain

Synchrotron X-ray phase-contrast imaging of ultrasonic drop atomization

Simulation of Capillary Wave Turbulence on the Basis of Fully Nonlinear Plane-Symmetric Model

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