Acoustic radiation torque on a particle in a fluid: An angular spectrum based compact expression

Zhixiong Gong (1, 2) , Michael Baudoin (1, 3, 2, 4)

1 IEMN - Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520
2 AIMAN-FILMS - IEMN - Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN
3 IUF - Institut universitaire de France
4 LIA LICS/LEMAC - Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique

In this work, a set of compact analytical formulas is derived expressing the three-dimensional acoustic radiation torque (ART) exerted on a particle of arbitrary shape embedded in a fluid and insonified by an arbitrary acoustic field. This formulation enables direct computation of the ART from the angular spectrum based beam shape coefficients introduced by Sapozhnikov and Bailey [J. Acoust. Soc. Am. 133, 661–676 (2013)] and the partial wave coefficients. It is particularly well suited to determine the ART exerted on a particle when the acoustic field is known in a source plane.

Domaines: Acoustique [physics.class-ph]

Zhixiong Gong, Michael Baudoin. Acoustic radiation torque on a particle in a fluid: An angular spectrum based compact expression. Journal of the Acoustical Society of America, 2020, 148 (5), pp.3131-3140. ⟨10.1121/10.0002491⟩. ⟨hal-03329995⟩