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Acoustic treaming visualization in elastic spherical cavities

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Abstract

Flow visualizations are presented for acoustic streaming occurring inside spherical elastic cavities oscillating in an acoustic field. Streaming flows are visualized using Particle Image Velocimetry (PIV) and results are observed for a range of values of a dimensionless frequency parameter,M=120–306. Over the frequency range investigated, streaming flow fields remain steady at a given value ofM. The magnitude of the flows circulating inside the cavity remains small (<1 mm/s) and follows a non-linear dependency with respect to the acoustic power of the sound wave. The present boundary-driven cavity flows may enhance particle fluid transport mechanisms, leading ultimately to potential fluid mixing applications.

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Authors and Affiliations

  1. Institute of Fluid Dynamics, ETH Zurich, CH-8092, Zurich, Switzerland

    Sznitman J. & Rösgen T.

  2. Department of Mechanical Engineering & Applied Mechanics, University of Pennsylvania, 19104, Philadelphia, PA, USA

    Sznitman J.

Authors
  1. Sznitman J.
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  2. Rösgen T.
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Correspondence to Sznitman J..

Additional information

Josué Sznitman: He received his B.Sc. in mechanical engineering from MIT in 2002, M.Sc .(Dipl.-Ing.) and PhD in mechanical engineering from the Institute of Fluid Dynamics of the ETH Zurich (Swiss Federal Institute of Technnology) in 2003 and 2007, respectively. He is currently a postdoctoral researcher at the Department of Mechanical Engineering & Applied Mechanics at the University of Pennsylvania. His research interests are primarily in low-Reynolds flows, biofluid dynamics and microfluidics.

Thomas Rösgen: He received his M.Sc. (Dipl.-Ing.) degree in engineering physics in 1979 at the Technical University Berlin and his PhD in aeronautics in 1984 from the California Institute of Technology. He is currently a professor at the Institute of Fluid Dynamics of the ETH Zurich (Swiss Federal Institute of Technology). His current research interests are centered in the field of modern electro-optical diagnostics and image processing with application to fluid dynamics. He also takes interest in problems concerning the physics of fluids and flow phenomena in constrained geometries.

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Sznitman, J., Rösgen, T. Acoustic treaming visualization in elastic spherical cavities. J Vis 11, 347–355 (2008). https://doi.org/10.1007/BF03182203

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  • DOI: https://doi.org/10.1007/BF03182203

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