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Dynamics of a spherical particle in an acoustic field: A multiscale approach
Physics of Fluids
A rigid spherical particle in an acoustic wave field oscillates at the wave period but has also a mean motion on a longer time scale. The dynamics of this mean motion is crucial for numerous applications of acoustic microfluidics, including particle manipulation and flow visualisation. It is controlled by four physical effects: acoustic (radiation) pressure, streaming, inertia and viscous drag. In this paper, we carry out a systematic multiscale analysis of the problem in order to assess thedoi:10.1063/1.4896523 fatcat:jufdq3ehsfgo5ipdtlj6g57hea