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A further note on the bathtub vortex

Published online by Cambridge University Press:  28 March 2006

D. L. Kelly
Affiliation:
Massachusetts Institute of Technology, Cambridge, Massachusetts
B. W. Martin
Affiliation:
Massachusetts Institute of Technology, Cambridge, Massachusetts
E. S. Taylor
Affiliation:
Massachusetts Institute of Technology, Cambridge, Massachusetts

Abstract

Using identical equipment, an attempt was made to reproduce the unexpected flow reversals obtained by Sibulkin (1962) in his study of the vortex motion associated with draining a liquid from a vessel through an orifice in its bottom. Reversal of the initial direction of rotation was found only for counter-clockwise filling with large initial heads and settling times, unless during settling or draining of the vessel a shock was applied to the system, in which case the tendency to reversal was generally more pronounced with clockwise filling. Re-reversal of the motion was also observed in a number of cases. An alternative explanation is proposed, based on a consideration of the surface waves generated by a shock.

Type
Research Article
Copyright
© 1964 Cambridge University Press

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References

Schlichting, H. 1955 Boundary-Layer Theory. New York: McGraw-Hill.
Sibulkin, M. 1962 J. Fluid Mech. 14, 21.