Scaling effects on flow hydrodynamics of confined microdroplets induced by Rayleigh surface acoustic wave

M. Alghane, Y. Q. Fu, B. X. Chen, Y. Li, M. P. Y. Desmulliez, A. J. Walton

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16 Citations (Scopus)

Abstract

This paper reports an experimental and numerical investigation on the scaling effects in the flow hydrodynamics for confined microdroplets induced by a surface acoustic wave (SAW). The characteristic parameters of the flow hydrodynamics were studied as a function of the separation height, H, between the LiNbO3 substrate and a top glass plate, for various droplets volumes and radio-frequency powers. The ratio of the gap height to attenuation length of the SAW, H/l(SAW), is shown to be an important parameter affecting the streaming flow induced in this confined regime. The reported numerical and experimental results are in good agreement over the range examined in this study and demonstrate that, at a lower gap heights of H

Original languageEnglish
Pages (from-to)919-927
Number of pages9
JournalMicrofluidics and Nanofluidics
Volume13
Issue number6
Early online date12 Jul 2012
DOIs
Publication statusPublished - Dec 2012

Keywords

  • Microdroplet
  • Scaling
  • Confined
  • Mixing
  • Surface acoustic wave
  • NUMERICAL-SIMULATION
  • MICROFLUIDICS
  • PROPAGATION
  • MICROSCALE
  • CRYSTAL
  • DEVICES
  • DRIVEN
  • SAW

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