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Surface effects of vertically propagating gravity waves in a stratified fluid

Published online by Cambridge University Press:  21 April 2006

Erland KällÉn
Erland KällÉn
Affiliation:
Department of Meteorology, University of Stockholm, Arrhenius Laboratory, S-106 91 Stockholm, Sweden
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Abstract

A linear, stationary internal-wave model is used to determine the vertical propagation of gravity waves produced by submerged moving bodies in a stratified fluid. The turbulent wake generated by the moving object is taken into account parameterically. If the stability of the stratification above the body increases (i.e. the body is under a thermocline) resonance effects occur. Large-amplitude internal waves are generated and they give rise to strong divergence fields at the water surface. These will persist far downstream of the object and are potentially detectable. Limitations of the linear model and comparisons with experimental results available in the literature are discussed.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 182 , September 1987 , pp. 111 - 125
Copyright
© 1987 Cambridge University Press

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