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Fluid streaming and microparticles manipulating based on piezoelectric arrays excitation with various switching frequencies and duty cycles

文献类型： 外文期刊

作者： Zhang, Fan 1 ; Ma, Cong 3 ; Zhang, Jianhua 3 ; Wei, Bin 1 ; Zhang, Bing 2 ;

作者机构： 1.Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing, Peoples R China

2.Beijing Univ Chem Technol, Sch Mech & Elect Engn, Beijing, Peoples R China

3.NingXia Acad Agr & Forestry Sci, Inst Agr Econ & Informat Technol, Yinchuan, Peoples R China

关键词： Acoustic; streaming; duty cycle; piezoelectrics; tweezers

期刊名称：PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE （ 影响因子：1.7； 五年影响因子：1.9 ）

ISSN： 0954-4062

年卷期： 2025 年 239 卷 9 期

页码：

收录情况： SCI

摘要： Acoustic vortices can transfer angular momentum and trap particles. Here, we establish an annular arrays consisting of 64 piezoelectric ceramics to produce planar acoustic vortices and control the angular velocity and direction of streaming in fluid by excitation of piezoelectric. The particles in fluid chamber are trapped and move along lower pressure area. The angular velocities of them are theoretical analyzed by Bessel Function and experimentally observed by microscope. Also the PIV (Particle Image Velocimetry) method is adopted to evaluate the movement of particles in experiments and stable angular velocity of streaming by tools of MATLAB. The results show that vortices exist in fluid chamber with the excitation of piezoelectric arrays and the angular velocity is influenced by parameters of switching frequency and duty cycle of excitation. This research is helpful to realize the angular velocity and direction manipulation of particles which are trapped in fluid streaming and helpful to guide the design of acoustic tweezers.

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