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Microfluidics and Nanofluidics

, Volume 18, Issue 5–6, pp 1107–1114 | Cite as

Focused surface acoustic wave induced jet formation on superhydrophobic surfaces

  • Marten Darmawan
  • Doyoung ByunEmail author
Research Paper

Abstract

We investigated the unusual droplet jetting formation as a response to the high intensity of a focused acoustic wave on superhydrophobic surface. When focused surface acoustic waves come into contact with a free surface droplet, an elongated pinched liquid column is formed due to the translation of the acoustic radiation force into the inertial body force on the bulk of the droplet. This phenomenon, however, was found to differ as the surface wettability changed. We examined this phenomenon by conducting an experimental observation of the droplet deformation, and a further analysis was carried out using a numerical study, providing a quasi-quantitative analysis of the acoustic radiation pressure distribution.

Keywords

Focused surface acoustic wave Droplet jetting Surface wettability Acoustic radiation force 

Notes

Acknowledgments

This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Education, Science, and Technology (2011-0016461), and by the Industrial Core Technology Development Project through the Ministry of Knowledge and Commerce (10035644-2012-03).

Supplementary material

Supplementary material 1 (MP4 1144 kb)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringSungkyunkwan UniversitySuwonRepublic of Korea

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