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Effects of multi-scattering on the performance of a single-beam acoustic manipulation device

Effects of multi-scattering on the performance of a single-beam acoustic manipulation device
Effects of multi-scattering on the performance of a single-beam acoustic manipulation device
The effects of multiple scattering on acoustic manipulation of spherical particles using helicoidal Bessel-beams are discussed. A closed-form analytical solution is developed to calculate the acoustic radiation force resulting from a Besselbeam on an acoustically reflective sphere, in the presence of an adjacent spherical particle, immersed in an unbounded fluid medium. The solution is based on the standard Fourier decomposition method and the effect of multi-scattering is taken into account using the addition theorem for spherical coordinates. Of particular interest here is the investigation of the effects of multiple scattering on the emergence of negative axial forces. To investigate the effects, the radiation force applied on the target particle resulting from a helicoidal Bessel-beam of different azimuthal indexes (m = 1 to 4), at different conical angles, is computed. Results are presented for soft and rigid spheres of various sizes, separated by a finite distance. Results have shown that the emergence of negative force regions is very sensitive to the level of cross-scattering between the particles. It has also been shown that in multiple scattering media, the negative axial force may occur at much smaller conical angles than previously reported for single particles, and that acoustic manipulation of soft spheres in such media may also become possible.

acoustic beams, acoustics, equations, force, mathematical model, particle beams, scattering
0885-3010
1741-1749
Azarpeyvand, M.
05191a9a-040a-45d2-a5d7-d4044b4c60ba
Alibakhshi, M.A.
7066983a-069f-439b-b8c1-d55565a6024d
Self, R.H.
8b96166d-fc06-48e7-8c76-ebb3874b0ef7
Azarpeyvand, M.
05191a9a-040a-45d2-a5d7-d4044b4c60ba
Alibakhshi, M.A.
7066983a-069f-439b-b8c1-d55565a6024d
Self, R.H.
8b96166d-fc06-48e7-8c76-ebb3874b0ef7

Azarpeyvand, M., Alibakhshi, M.A. and Self, R.H. (2012) Effects of multi-scattering on the performance of a single-beam acoustic manipulation device. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 59 (8), 1741-1749.

Record type: Article

Abstract

The effects of multiple scattering on acoustic manipulation of spherical particles using helicoidal Bessel-beams are discussed. A closed-form analytical solution is developed to calculate the acoustic radiation force resulting from a Besselbeam on an acoustically reflective sphere, in the presence of an adjacent spherical particle, immersed in an unbounded fluid medium. The solution is based on the standard Fourier decomposition method and the effect of multi-scattering is taken into account using the addition theorem for spherical coordinates. Of particular interest here is the investigation of the effects of multiple scattering on the emergence of negative axial forces. To investigate the effects, the radiation force applied on the target particle resulting from a helicoidal Bessel-beam of different azimuthal indexes (m = 1 to 4), at different conical angles, is computed. Results are presented for soft and rigid spheres of various sizes, separated by a finite distance. Results have shown that the emergence of negative force regions is very sensitive to the level of cross-scattering between the particles. It has also been shown that in multiple scattering media, the negative axial force may occur at much smaller conical angles than previously reported for single particles, and that acoustic manipulation of soft spheres in such media may also become possible.

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Published date: August 2012
Keywords: acoustic beams, acoustics, equations, force, mathematical model, particle beams, scattering
Organisations: Acoustics Group

Identifiers

Local EPrints ID: 351944
URI: https://eprints.soton.ac.uk/id/eprint/351944
ISSN: 0885-3010
PURE UUID: 52b10d2f-a92a-4753-94ee-d5bd9418902b

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Date deposited: 15 Jul 2013 12:05
Last modified: 29 Sep 2017 04:33

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