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Intrusion into a stratified fluid

Published online by Cambridge University Press:  29 March 2006

P. C. Manins
P. C. Manins
Affiliation:
CSIRO Division of Atmospheric Physics, P.O. Box 77, Mordialloc, Victoria 3195, Australia
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Abstract

Preliminary measurements have been made of the debouching of homogeneous fluid from a broad source at its equilibrium depth into a linearly stratified tank of salt water. With c the velocity of the nose of the intrusion, h its half-thickness near the source, N the environmental buoyancy frequency and v the kinematic viscosity of the fluid, it is shown for 100 [lsim ] Re ≡ 2ch/ν [lsim ] 500 that the intrusion becomes practically steady under an inertia-buoyancy balance. The internal Froude number Fr = c/Nh is shown to be of order unity. Forward-propagating disturbances and the ends of the tank are inferred to play an important part in the flow.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 74 , Issue 3 , 6 April 1976 , pp. 547 - 560
Copyright
© 1976 Cambridge University Press

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