Numerical simulation of single bubble dynamics under acoustic standing waves

Ultrasonics Sonochemistry
Sicong QiuMindi Zhang

Abstract

The objective of this paper is to apply numerical method to simulate the single bubble dynamics under the acoustic standing waves, which is an extensive research of our previous work (Ma et al. Ultrason. Sonochem., vol. 42, 2018, pp. 619-630). The Navier-Stokes equation, which considers the acoustic radiation force caused by acoustic standing wave, is used to capture the transient shape variation, pressure fluctuation, and the direction of the bubble motion, especially for the case of the bubble near the rigid boundary. Several normalized parameters, such as acoustic pressure amplitude, acoustic wave number, and bubble size, are investigated in temporal and spatial scales to actively influence the direction of the liquid jet caused by bubble collapse. The numerical results show that due to the strong interaction with the acoustic standing wave, the bubble loses the spherical shape and generates a high-speed liquid jet. It worth noting that a significantly high pressure and velocity peak is respectively founded at the boundary wall, which is caused by the toroidal bubble collapse. Furthermore, in the standing wave field, single bubble would have distinctly different behaviors with the change of its resonance radius size. The hig...Continue Reading

References

Mar 10, 2001·Ultrasonics Sonochemistry·V S MoholkarA B Pandit
Mar 20, 2004·Ultrasonics Sonochemistry·Aharon Gedanken
Apr 6, 2004·Ultrasound in Medicine & Biology·E A Brujan
Oct 12, 2004·Ultrasonics Sonochemistry·Shobha MuthukumaranFranz Grieser
Sep 17, 2009·Journal of Fluid Mechanics·Eric Johnsen, Tim Colonius
Mar 21, 2018·Ultrasonics Sonochemistry·Xiaojian MaGuoyu Wang

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Citations

Aug 28, 2019·Ultrasonics Sonochemistry·Takuya YamamotoSergey V Komarov

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