Broadband acoustic trapping of a particle by a soft plate with a periodic deep grating

We investigated the acoustic radiation force (ARF) acting on a cylindrical brass particle near an acoustically soft plate patterned with a periodic deep grating. The existence of a negative ARF by which the particle can be pulled towards the sound source is confirmed. In addition, the bandwidth for...

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Bibliographic Details
Published inJournal of applied physics Vol. 117; no. 16
Main Authors He, Hailong, Ouyang, Shiliang, He, Zhaojian, Deng, Ke, Zhao, Heping
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 28.04.2015
Subjects
Acoustics
Applied physics
BRASS
Brass plating
Broadband
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COUPLING
CYLINDRICAL CONFIGURATION
EXCITATION
GRATINGS
PARTICLES
PERIODICITY
PLATES
RESONANCE
SOUND WAVES
Surface waves
SURFACES
Thin plates
TRAPPING
VELOCITY
Velocity distribution
VORTICES
WAVE PROPAGATION
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Summary:We investigated the acoustic radiation force (ARF) acting on a cylindrical brass particle near an acoustically soft plate patterned with a periodic deep grating. The existence of a negative ARF by which the particle can be pulled towards the sound source is confirmed. In addition, the bandwidth for negative ARF in this soft-plate system is found to be considerably broader than in the stiff-plate systems typically used in previous studies. It is further demonstrated by field distribution analysis that the negative ARF is caused by the gradient force induced by the gradient vortex velocity field near the surface, which stems from the collective resonance excitation of the antisymmetric coupling of Scholte surface waves in the thin plate. The effects of particle location and size on the ARF were also investigated in detail. The negative ARF has potential use in applications requiring particle manipulation using acoustic waves.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4919218