中国物理B ›› 2020, Vol. 29 ›› Issue (9): 94301-094301.doi: 10.1088/1674-1056/ab943e

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Acoustic radiation force on thin elastic shells in liquid

Run-Yang Mo(莫润阳), Jing Hu(胡静), Shi Chen(陈时), Cheng-Hui Wang(王成会)   

  1. Shaanxi Key Laboratory of Ultrasonics, School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China
  • 收稿日期:2020-03-06 修回日期:2020-05-11 接受日期:2020-05-19 出版日期:2020-09-05 发布日期:2020-09-05
  • 通讯作者: Cheng-Hui Wang E-mail:wangld001@snnu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11974232, 11727813, 11474191, and 11474192).

Acoustic radiation force on thin elastic shells in liquid

Run-Yang Mo(莫润阳), Jing Hu(胡静), Shi Chen(陈时), Cheng-Hui Wang(王成会)   

  1. Shaanxi Key Laboratory of Ultrasonics, School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China
  • Received:2020-03-06 Revised:2020-05-11 Accepted:2020-05-19 Online:2020-09-05 Published:2020-09-05
  • Contact: Cheng-Hui Wang E-mail:wangld001@snnu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11974232, 11727813, 11474191, and 11474192).

摘要: Based on the coupled acoustic scattering of two neighboring fluid-filled thin elastic shells suspending in an unbounded viscous liquid, an analytical method is developed to calculate the acoustic radiation force (ARF) of the shells. Two physical effects are taken into account: elastic radiation scattering and the multiple interactions of shells. Numerical results reveal that the magnitude of ARF can be enhanced by the sound radiation from the elastic shell undergoing forced vibrations and two resonant peaks can be observed on the ARF function curves. The feature of the lower peak is determined by the interactions and acoustic response of the back shell. The attractive forces can be obtained in the low kR1 band for the case of radius ratio R2/R1>1, while the magnitude of ARF at the lower peak may be influenced to some extent by acoustic shielding phenomenon for the case of radius ratio R2/R1<1. Accordingly, the interactions of particles cannot be ignored. The results may provide a theoretical basis for precisive manipulation of multiple particle systems.

关键词: thin elastic shell, radiation force, elastic radiation scattering, mutual interactions

Abstract: Based on the coupled acoustic scattering of two neighboring fluid-filled thin elastic shells suspending in an unbounded viscous liquid, an analytical method is developed to calculate the acoustic radiation force (ARF) of the shells. Two physical effects are taken into account: elastic radiation scattering and the multiple interactions of shells. Numerical results reveal that the magnitude of ARF can be enhanced by the sound radiation from the elastic shell undergoing forced vibrations and two resonant peaks can be observed on the ARF function curves. The feature of the lower peak is determined by the interactions and acoustic response of the back shell. The attractive forces can be obtained in the low kR1 band for the case of radius ratio R2/R1>1, while the magnitude of ARF at the lower peak may be influenced to some extent by acoustic shielding phenomenon for the case of radius ratio R2/R1<1. Accordingly, the interactions of particles cannot be ignored. The results may provide a theoretical basis for precisive manipulation of multiple particle systems.

Key words: thin elastic shell, radiation force, elastic radiation scattering, mutual interactions

中图分类号:  (Nonlinear acoustics)

  • 43.25.+y
43.35.+d (Ultrasonics, quantum acoustics, and physical effects of sound)