English

Equivalence between angular spectrum-based and multipole expansion-based formulas of the acoustic radiation force and torque

Applied Physics 2021-06-09 v1 Fluid Dynamics

Abstract

Two main methods have been proposed to derive the acoustical radiation force and torque applied by an arbitrary acoustic field on a particle: The first one relies on the plane wave angular spectrum decomposition of the incident field (see [Sapozhnikov and Bailey, J. Acoust. Soc. Am. 133, 661 (2013)] for the force and [Gong and Baudoin, J. Acoust. Soc. Am. 148, 3131 (2020)] for the torque), while the second one relies on the decomposition of the incident field into a sum of spherical waves, the so-called multipole expansion (see [Silva, J. Acoust. Soc. Am. 130, 3541 (2011)] and [Baresh et al., J. Acoust. Soc. Am. 133, 25 (2013)] for the force, and [Silva et al., EPL 97, 54003 (2012)] and [Gong et al., Phys. Rev. Applied 11, 064022 (2019)] for the torque). In this paper, we formally establish the equivalence between the expressions obtained with these two methods for both the force and torque.

Keywords

Cite

@article{arxiv.2102.02678,
  title  = {Equivalence between angular spectrum-based and multipole expansion-based formulas of the acoustic radiation force and torque},
  author = {Zhixiong Gong and Michael Baudoin},
  journal= {arXiv preprint arXiv:2102.02678},
  year   = {2021}
}

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37 pages