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Free-surface effects on spin-up in a rectangular tank

Published online by Cambridge University Press:  10 March 1997

J. A. VAN DE KONIJNENBERG  and
G. J. F. VAN HEIJST
J. A. VAN DE KONIJNENBERG
Affiliation:
Fluid Dynamics Laboratory, Department of Technical Physics, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
G. J. F. VAN HEIJST
Affiliation:
Fluid Dynamics Laboratory, Department of Technical Physics, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
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Abstract

The dependence of spin-up in a rectangular tank on deformation of the free surface is investigated experimentally. The results agree with earlier experimental and numerical data about the motion of vortices over topography. However, the presence of sidewalls appears to interact with the vortex drift induced by the surface topography. This combined effect provides a qualitative explanation for the observed behaviour of individual vortices. In particular, in the presence of free-surface deformation, cyclonic vortices in an elongated rectangle tend to drift away from the centre of the tank, so that their merging in the centre is discouraged.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 334 , 10 March 1997 , pp. 189 - 210
Copyright
© 1997 Cambridge University Press

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