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Acoustic Force Density Acting on Inhomogeneous Fluids in Acoustic Fields

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Author

Summary, in English

We present a theory for the acoustic force density acting on inhomogeneous fluids in acoustic fields on time scales that are slow compared to the acoustic oscillation period. The acoustic force density depends on gradients in the density and compressibility of the fluid. For microfluidic systems, the theory predicts a relocation of the inhomogeneities into stable field-dependent configurations, which are qualitatively different from the horizontally layered configurations due to gravity. Experimental validation is obtained by confocal imaging of aqueous solutions in a glass-silicon microchip.

Publishing year

2016-09-09

Language

English

Pages

114504-114504

Publication/Series

Physical Review Letters

Volume

117

Issue

11

Document type

Journal article

Publisher

American Physical Society

Topic

  • Physical Sciences

Status

Published

ISBN/ISSN/Other

  • ISSN: 1079-7114