Acoustic radiation torque on a particle in a fluid: An angular spectrum based compact expression
Zhixiong Gong, Michael Baudoin
Abstract
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.
Topics & Concepts
PhysicsAngular spectrum methodAcoustic radiationComputationTorqueAcousticsSpectrum (functional analysis)Particle (ecology)RadiationAcoustic waveOpticsBeam (structure)Expression (computer science)Physical acousticsSet (abstract data type)Classical mechanicsAcoustic radiation forceShell (structure)Acoustic wave equationSurface (topology)Computational physicsField (mathematics)Surface acoustic waveFrequency spectrumMathematical analysisRadiation pressureParticle beamAngular momentumAngular displacementAcoustic source localizationAngular velocityMicrofluidic and Bio-sensing TechnologiesUltrasound and Cavitation PhenomenaAcoustic Wave Phenomena Research