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Erschienen in: Experiments in Fluids 5/2004

01.05.2004 | Original

The optimal drop shape for vortices generated by drop impacts: the effect of surfactants on the drop surface

verfasst von: J. R. Saylor, N. K. Grizzard

Erschienen in: Experiments in Fluids | Ausgabe 5/2004

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Abstract

Subsurface vortices are frequently created when a falling drop strikes a flat water surface. Prior work has demonstrated that the shape of the drop at the point of impact is critical in determining how deep or how fast the resulting vortex will penetrate into the water bulk. In the present study, the details of this phenomena are explored by using surfactants to vary surface tension. Specifically, Triton X-100 monolayers are created on the surface of the drop, and on the flat water surface. The results of these experiments suggest that there is no single optimal drop shape resulting in best vortex penetration. Rather, the data suggest that the optimal shape depends on the surface tension of the falling drop. An attempt is made to reconcile contradictory results in the literature using this result.

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Fußnoten
1
In this paper, oblate refers to an ellipsoid with its major axis in the horizontal orientation, and prolate refers to an ellipsoid with its major axis in the vertical orientation.
 
2
An exception was noted for low viscosity liquids such as Freon 11 and acetone, but only for the initial peak.
 
3
Actually a voltage corresponding to the centroid location of the laboratory background illumination.
 
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Metadaten
Titel
The optimal drop shape for vortices generated by drop impacts: the effect of surfactants on the drop surface
verfasst von
J. R. Saylor
N. K. Grizzard
Publikationsdatum
01.05.2004
Verlag
Springer-Verlag
Erschienen in
Experiments in Fluids / Ausgabe 5/2004
Print ISSN: 0723-4864
Elektronische ISSN: 1432-1114
DOI
https://doi.org/10.1007/s00348-003-0760-4

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