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Acoustic radiation torque of a viscoelastic sphere in a zero-order Mathieu beam.

J Acoust Soc Am

March 2025

Shaanxi Key Laboratory of Ultrasonics, School of Physics & Information Technology, Shaanxi Normal University, Xi'an 710119, People's Republic of China.

The exact expressions of the three-dimension acoustic radiation torque (ART) of a viscoelastic sphere arbitrarily positioned in a zero-order Mathieu beam (zMB) are derived in this paper. The effects of the ellipticity parameters, half-cone angles, dimensionless frequency, and particle position on the acoustic radiation torques of the spherical particle are studied. Simulation results show the axial ART is zero for an arbitrarily positioned viscoelastic PE sphere in a zMB, while for the x or y axis ART, it varies significantly with the particle position and beam parameters.

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