论文期刊

Performance and robustnessImprovement of Ultrasonic Transportation against Large scale Streaming




作者: Kun Jia,Keji Yang,Bingfeng Ju*
发表/完成日期: 2016-02-10
期刊名称: Journal of Vibration and Acoustics-Transactions of the ASME
期卷:
相关文章:
论文简介
Acoustic streaming generated from the traveling-wave component of a synthesized sound
field often has considerable influence on ultrasonic manipulations, in which the behavior
of microparticles may be disturbed. In this work, the large-scale streaming pattern in a
chamber with three incident plane waves is simulated, illustrating a directional traveling
stream pattern and several vortical structures. Based on the numerical results, the trapping
capability of an acoustic potential well is quantitatively characterized according to
several evaluation criteria: the boundary and elastic constant of the acoustic potential
well, the acoustic radiation force offset ratio, and the elastic constant offset ratio. By
optimizing these parameters, the constraint of the acoustic potential well can be strengthened
to promote the performance and robustness of the ultrasonic transportation. An
ultrasonic manipulation device employing three 1.67-MHz lead zirconate titanate (PZT)
transducers with rectangular radiation surface is prototyped and performance tested.
The experimental results show that the average fluctuations of a microparticle during
transportation have been suppressed into a region less than 0.01 times the wavelength.
Particle displacement from equilibrium is no longer observed.
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