Numerical simulation of acoustic field under mechanical stirring

doi:10.1088/1674-1056/abf4bb

Abstract The present study analyzes the effect of stirring on ultrasonic degradation experiments through acoustic field distribution, which provides a guidance for further improvement of the degradation rate of organic solutions. It is known that in order to eliminate the standing wave field formed by ultrasonic radiation in the water tank, the liquid in the water tank needs to be stirred and the corresponding distribution of acoustic field is simulated by using the finite element method (FEM). The standing wave leads to an uneven distribution of the acoustic field when it is not stirred, and disappears after being stirred, which increases the cavitation area in the ultrasonic cleaning tank. Then, the degradation experiment with agitation is carried out. The experimental results show that the degradation rate of the solution is higher than that when there is no agitation, which confirms the importance of the acoustic field distribution to ultrasonic degradation. In addition, it is clear that with the increase of the stirring speed, the degradation rate increases first and reaches a maximum at 600 rpm before decreasing. Finally, the distribution of flow field is simulated and analyzed.

Keywords: ultrasonic degradation acoustic field finite element method flow field

Received: 19 January 2021
Revised: 05 March 2021
Accepted manuscript online: 05 April 2021

PACS:	43.25.+y	(Nonlinear acoustics)
	43.35.+d	(Ultrasonics, quantum acoustics, and physical effects of sound)
	43.38.+n	(Transduction; acoustical devices for the generation and reproduction of sound)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11674207 and 11674206).

Corresponding Authors: Zhuang-Zhi Shen
E-mail: szz6@163.com

Cite this article:

Jin-He Liu(刘金河), Zhuang-Zhi Shen(沈壮志), and Shu-Yu Lin(林书玉) Numerical simulation of acoustic field under mechanical stirring 2021 Chin. Phys. B 30 104302

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