Acoustic manipulation of oscillating spherical bodies: Emergence of axial negative acoustic radiation force

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• 作者：Majid Rajabi ; ^{majid_rajabi@iust.ac.ir" class="auth_mail" title="E-mail the corresponding author} ; Alireza Mojahed
• 关键词：Acoustic handling or Trapping ; Acoustic Levitation ; Radiation Force Cancellation ; Smart Carrier ; Radiation Force Reversal ; Acoustic Radiation Torque
• 刊名：Journal of Sound and Vibration
• 出版年：2016
• 出版时间：24 November 2016
• 年：2016
• 卷：383
• 期：Complete
• 页码：265-276
• 全文大小：1273 K

文摘

In this paper, emergence of negative axial acoustic radiation force on a rigid oscillating spherical body is investigated for acoustic manipulation purposes. The problem of plane acoustic wave scattering from an oscillating spherical body submerged in an ideal acoustic fluid medium is solved. For the case of oscillating direction collinear with the wave propagation wave number vector (desired path), it has been shown that the acoustic radiation force, as a result of nonlinear acoustic wave interaction with bodies can be expressed as a linear function of incident wave field and the oscillation properties of the oscillator (i.e., amplitude and phase of oscillation). The negative (i.e., pulling effects) and positive (i.e., pushing effects) radiation force situations are divided in oscillation complex plane with a specific frequency-dependant straight line. This characteristic line defines the radiation force cancellation state. In order to investigate the stability of the mentioned manipulation strategy, the case of misaligned oscillation of sphere with the wave propagation direction is studied. The proposed methodology may suggest a novel concept of single-beam acoustic handling techniques based on smart carriers.