The Mechanism and Simulation of Suspended Particle Manipulation in a Double Concave Focused Ultrasonic Field

TANG Xiaoyu; YAN Yalin; LI Tingfeng; ZHU Linlin; LI Ming; CAI Weibo

doi:10.6054/j.jscnun.2021053

Journal of South China Normal University (Natural Science Edition) > 2021 > 53(4): 17-23. > DOI: 10.6054/j.jscnun.2021053

TANG Xiaoyu, YAN Yalin, LI Tingfeng, ZHU Linlin, LI Ming, CAI Weibo. The Mechanism and Simulation of Suspended Particle Manipulation in a Double Concave Focused Ultrasonic Field[J]. Journal of South China Normal University (Natural Science Edition), 2021, 53(4): 17-23. DOI: 10.6054/j.jscnun.2021053

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The Mechanism and Simulation of Suspended Particle Manipulation in a Double Concave Focused Ultrasonic Field

Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials//Guangdong Provincial Engineering Technology Research Center for Optoelectronic Instrument//National Demonstration Center for Experimental Physics Education//School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China

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Received Date: December 22, 2020
Available Online: September 02, 2021

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Abstract

In order to improve the suspension ability of focused ultrasonic field and broaden the moving area of suspended particles, the calculation formula of sound pressure in the ultrasonic field and the relation between the delay time of array elements and the focus position in concave spherical array were studied. COMSOL multiphysics was used for simulation verification. By building a levitation device for the concave spherical ultrasonic array, the phase of emitter signal was controlled to realize the movement of suspended particles in the vertical direction. The particle motion trajectory in the experiment was in good agreement with that in the simulation experiment. The results showed that the double concave spherical ultrasonic array had stronger sound pressure and better focusing ability and the motion of the suspended particles in the two-dimensional plane could be realized with phase signal control.
- concave spherical ultrasonic array,
- sound pressure,
- suspension,
- COMSOL,
- multiphysics

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