3D characterization of the inner flow in an oscillating drop

3D characterization of the inner flow in an oscillating drop In this work, measurements of the velocity field inside a vertically shaken drop are presented. The drop-wetting condition is slightly hydrophobic. The drop is sandwiched between two horizontal glass plates in order to allow a good visualization. Digital in-line holography is utilized to access the three-dimensional flow inside the drop. When shaken, the drop experiences several transitions of its dynamics and shape: At low amplitude, its contact line is pinned and when the amplitude overcomes a threshold, it becomes unpinned. At even higher amplitude, the drop shows the faceted shape of a star. The obtained velocity vector maps are related to the transition in dynamics and shape. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

3D characterization of the inner flow in an oscillating drop

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Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2013 by Springer-Verlag Berlin Heidelberg
Subject
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s00348-013-1568-5
Publisher site
See Article on Publisher Site

Abstract

In this work, measurements of the velocity field inside a vertically shaken drop are presented. The drop-wetting condition is slightly hydrophobic. The drop is sandwiched between two horizontal glass plates in order to allow a good visualization. Digital in-line holography is utilized to access the three-dimensional flow inside the drop. When shaken, the drop experiences several transitions of its dynamics and shape: At low amplitude, its contact line is pinned and when the amplitude overcomes a threshold, it becomes unpinned. At even higher amplitude, the drop shows the faceted shape of a star. The obtained velocity vector maps are related to the transition in dynamics and shape.

Journal

Experiments in FluidsSpringer Journals

Published: Aug 31, 2013

References

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