Acoustically Driven Fluid and Particle Motion in Confined and Leaky Systems

Rune Barnkob, Nitesh Nama, Liqiang Ren, Tony Jun Huang, Francesco Costanzo, Christian J. Kähler

Research output: Contribution to journalArticlepeer-review

41 Scopus citations


The acoustic motion of fluids and particles in confined and acoustically leaky systems is receiving increasing attention for its use in medicine and biotechnology. A number of contradicting physical and numerical models currently exist, but their validity is uncertain due to the unavailability of hard-to-access experimental data for validation. We provide experimental benchmarking data by measuring 3D particle trajectories and demonstrate that the particle trajectories can be described numerically without any fitting parameter by a reduced-fluid model with leaky impedance-wall conditions. The results reveal the hitherto unknown existence of a pseudo-standing wave that drives the acoustic streaming as well as the acoustic radiation force on suspended particles.

Original languageEnglish (US)
Article number014027
JournalPhysical Review Applied
Issue number1
StatePublished - Jan 25 2018

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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