A viable method to predict acoustic streaming in presence of cavitation

Louisnard, Olivier

doi:10.1016/j.ultsonch.2016.09.013

Cited by 40 publications

(26 citation statements)

References 46 publications

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“…So far, one obstacle for the comprehensive entrance of this technology into the foundry industry has been the missing potential for simulating the processing and influence of ultrasonic melt treatments [10,34]. In recent years, many researchers have investigated acoustic streaming using (for instance) particle image velocimetry (PIV) analyses to predict the propagation of acoustic waves, as well as the development of acoustic streaming and its influence on the fluid using simulation tools [8,17,21,[35][36][37][38][39][40]. An overview of (some) research publications on the subject of simulation of ultrasonic treatment so far can be taken from [41] and Table 1.…”

Section: Introductionmentioning

confidence: 99%

“…However, to the best of our knowledge, almost none of these solutions offers a comprehensive approach. Some simulations concentrate mainly on acoustic streaming [36,38], but simplify the flow behaviour by neglecting the turbulences or treat the radiator as fluid inlet to evoke acoustic streaming and neglect cavitation to reduce the necessary computational power [21,35,42]. Others focus on the calculation of the occurring acoustic pressure distribution [8,17], sometimes in combination with acoustic streaming [43], or either solely on cavitation [44][45][46].…”

Section: Introductionmentioning

confidence: 99%

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Simulation of Ultrasonic Induced Cavitation and Acoustic Streaming in Liquid and Solidifying Aluminum

Riedel

Liepe

Scharf

2020

Metals

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Ultrasonic treatment (UST), more precisely, cavitation and acoustic streaming, of liquid light metal alloys is a very promising technology for achieving grain and structure refinement, and therefore, better mechanical properties. The possibility of predicting these process phenomena is an important requirement for understanding, implementing, and scaling this technology in the foundry industry. Using an established (casting) computational fluid dynamics (CFD)-simulation tool, we studied the ability of this software to calculate the onset and expansion of cavitation and acoustic streaming for the aluminum alloy A356, partly depending on different radiator geometries. A key aspect was a holistic approach toward pressure distribution, cavitation, and acoustic streaming prediction, and the possibility of two- and (more importantly) three-dimensional result outputs. Our feasibility analysis showed that the simulation tool is able to predict the mentioned effects and that the results obtained are in good agreement with the results and descriptions of previous investigations. Finally, capabilities and limitations as well as future challenges for further developments are discussed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simulation of Ultrasonic Induced Cavitation and Acoustic Streaming in Liquid and Solidifying Aluminum

Riedel

Liepe

Scharf

2020

Metals

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“…In the present experiments under silent conditions, a rather poor mixing is expected, resulting in large local supersaturation gradients, which yield in turn very dispersed crystal sizes. Cavitation is known to enhance mixing either by acoustic (macroscopic) streaming, acting as if additional mechanical stirring were present [28][29][30][31][32][33][34][35], or by micro- Supersaturation ratio, S Fig. 7.…”

Section: Influence Of Dissipated Powermentioning

confidence: 99%

Crystallization of α-glycine by anti-solvent assisted by ultrasound

Vera

Baillon

Espitalier

et al. 2019

Ultrasonics Sonochemistry

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Crystallization of α-glycine by addition of an anti-solvent (ethanol) assisted by ultrasound is studied. The experiments of crystallization are conducted at 303.15 K in a solution of 150 ml with continuous agitation by a magnetic rod. Ultrasound is then applied at powers ranging from 8 to 41 W thanks to an ultrasonic horn at 20 kHz. The supersaturation ratio (S) is followed throughout all the experiment. At the end of the experiment, the suspension is filtered, the solid is washed with ethanol and dried at 333.15 K. The resulting crystals are characterized by their final size distributions measured by laser granulometry, their morphologies observed by scanning electronic microscope (SEM) and their crystalline structures by differential scanning calorimetry (DSC). The influence of ultrasonic power (continuous 13, 28 and 40 W or pulsed modes), measured by calorimetry method, is studied for different addition rates (0.05 to 0.36 g of ethanol/min). Ultrasound permits to reduce the metastable zone width and to decrease the size of crystals due to an increase of the nucleation rate. The rate of de-supersaturation is higher in presence of ultrasound, inducing a higher nucleation rate, a higher growth rate or both. At 40 W, the decrease of supersaturation is faster, and the crystallization is finished in 40 min instead of 80 min (at 13 and 28 W) or 120 min without ultrasound. The use of pulsed ultrasound (50 on/50 off) is interesting from an economic point of view because similar results are obtained: comparable size distributions and resembling concentration profiles.

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“…Linking the observation of acoustic streaming in the presence of cavitation is important to develop more efficient processes. Louisnard et al [43] developed a theory to understand acoustic streaming in the presence of cavitation, which to date, had yet to be fully understood. In their theory, This type of device has great potential usefulness in many biochemical studies and applications, since rapid mixing and homogenization is of great importance across a wide variety of applications.…”

Section: Mixing In Microfluidic Systemsmentioning

confidence: 99%

Microstreaming and Its Role in Applications: A Mini-Review

Jalal

Leong

2018

Fluids

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Acoustic streaming is the steady flow of a fluid that is caused by the propagation of sound through that fluid. The fluid flow in acoustic streaming is generated by a nonlinear, time-averaged effect that results from the spatial and temporal variations in a pressure field. When there is an oscillating body submerged in the fluid, such as a cavitation bubble, vorticity is generated on the boundary layer on its surface, resulting in microstreaming. Although the effects are generated at the microscale, microstreaming can have a profound influence on the fluid mechanics of ultrasound/acoustic processing systems, which are of high interest to sonochemistry, sonoprocessing, and acoustophoretic applications. The effects of microstreaming have been evaluated over the years using carefully controlled experiments that identify and quantify the fluid motion at a small scale. This mini-review article overviews the historical development of acoustic streaming, shows how microstreaming behaves, and provides an update on new numerical and experimental studies that seek to explore and improve our understanding of microstreaming.

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A viable method to predict acoustic streaming in presence of cavitation

Cited by 40 publications

References 46 publications

Simulation of Ultrasonic Induced Cavitation and Acoustic Streaming in Liquid and Solidifying Aluminum

Simulation of Ultrasonic Induced Cavitation and Acoustic Streaming in Liquid and Solidifying Aluminum

Crystallization of α-glycine by anti-solvent assisted by ultrasound

Microstreaming and Its Role in Applications: A Mini-Review

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