中国物理B ›› 2023, Vol. 32 ›› Issue (6): 64304-064304.doi: 10.1088/1674-1056/acc800

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Helical particle manipulation based on power-exponent-phase acoustic vortices generated by a sector transducer array

Qingdong Wang(王青东)1,†, Yantao Hu(胡彦涛)2, Shengli Wang(王胜利)1, and Hongyu Li(李洪宇)1   

  1. 1 College of Ocean Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China;
    2 Department of Modern Architecture, Linyi Vocational College, Linyi 276017, China
  • 收稿日期:2023-01-09 修回日期:2023-03-06 接受日期:2023-03-28 出版日期:2023-05-17 发布日期:2023-06-26
  • 通讯作者: Qingdong Wang E-mail:wangqingdong@sdust.edu.cn
  • 基金资助:
    Project supported by the Natural Science Foundation of Shandong Province, China (Grant Nos. ZR2022MF336 and ZR2022MD036).

Helical particle manipulation based on power-exponent-phase acoustic vortices generated by a sector transducer array

Qingdong Wang(王青东)1,†, Yantao Hu(胡彦涛)2, Shengli Wang(王胜利)1, and Hongyu Li(李洪宇)1   

  1. 1 College of Ocean Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China;
    2 Department of Modern Architecture, Linyi Vocational College, Linyi 276017, China
  • Received:2023-01-09 Revised:2023-03-06 Accepted:2023-03-28 Online:2023-05-17 Published:2023-06-26
  • Contact: Qingdong Wang E-mail:wangqingdong@sdust.edu.cn
  • Supported by:
    Project supported by the Natural Science Foundation of Shandong Province, China (Grant Nos. ZR2022MF336 and ZR2022MD036).

摘要: The characteristics of traditional acoustic vortices (AVs) were verified by the cross-sectional axisymmetric pressure distributions with perfect phase spirals around the center pressure null. In order to generate a non-axisymmetric pressure distribution, the concept of power-exponent-phase was first introduced into the formation of AV beams, named "power-exponent-phase acoustic vortices (PAVs)" in this paper. Based on a ring-array of sector transducers, the helical distribution of the low-pressure valley in cross-sections of PAVs, which enables particles to move from a distant position to the center low-potential well along a certain spiral passageway, was proved theoretically. The particle manipulation behavior for PAVs with a power order of 2 is numerically modeled and experimentally confirmed. The results show that PAVs with a non-axisymmetric spiral pressure distribution can be used to realize the directional transport of particles in an enlarged scope, suggesting prospective application potential in biomedical engineering.

关键词: acoustic vortices, power-exponent-phase, spiral potential well, sector transducer array, particle manipulation

Abstract: The characteristics of traditional acoustic vortices (AVs) were verified by the cross-sectional axisymmetric pressure distributions with perfect phase spirals around the center pressure null. In order to generate a non-axisymmetric pressure distribution, the concept of power-exponent-phase was first introduced into the formation of AV beams, named "power-exponent-phase acoustic vortices (PAVs)" in this paper. Based on a ring-array of sector transducers, the helical distribution of the low-pressure valley in cross-sections of PAVs, which enables particles to move from a distant position to the center low-potential well along a certain spiral passageway, was proved theoretically. The particle manipulation behavior for PAVs with a power order of 2 is numerically modeled and experimentally confirmed. The results show that PAVs with a non-axisymmetric spiral pressure distribution can be used to realize the directional transport of particles in an enlarged scope, suggesting prospective application potential in biomedical engineering.

Key words: acoustic vortices, power-exponent-phase, spiral potential well, sector transducer array, particle manipulation

中图分类号:  (Speech processing and communication systems)

  • 43.72.+q
43.38.Hz (Transducer arrays, acoustic interaction effects in arrays)