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The evolution of thermocline waves from an oscillatory disturbance

Published online by Cambridge University Press:  26 April 2006

D. Nicolaou ,
R. Liu  and
T. N. Stevenson
D. Nicolaou
Affiliation:
Department of Engineering, University of Manchester, Oxford Road, Manchester M13 9PL, UK Present address: Department of Mechanical Engineering, University of Liverpool, PO Box 147, Liverpool, L69 3BX, UK.
R. Liu
Affiliation:
Department of Engineering, University of Manchester, Oxford Road, Manchester M13 9PL, UK
T. N. Stevenson
Affiliation:
Department of Engineering, University of Manchester, Oxford Road, Manchester M13 9PL, UK
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Abstract

The way in which energy propagates away from a two-dimensional oscillatory disturbance in a thermocline is considered theoretically and experimentally. It is shown how the St. Andrew's-cross-wave is modified by reflections and how the cross-wave can develop into thermocline waves. A linear shear flow is then superimposed on the thermocline. Ray theory is used to evaluate the wave shapes and these are compared to finite-difference solutions of the full Navier–Stokes equations.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 254 , September 1993 , pp. 401 - 416
Copyright
© 1993 Cambridge University Press

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