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A note on spatially growing three-dimensional disturbances in a free shear layer

Published online by Cambridge University Press:  29 March 2006

A. Michalke
A. Michalke
Affiliation:
Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., Institut für Turbulenzforschung, Berlin
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Abstract

It does not seem to be possible to prove analytically that an incompressible, inviscid free shear layer is less unstable with respect to spatially growing three-dimensional disturbances than to two-dimensional ones. For this reason a numerical calculation for the special case of the hyperbolic tangent velocity profile was performed. It was found that even for spatially growing disturbances the amplification of three-dimensional disturbances is smaller than for two-dimensional ones.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 38 , Issue 4 , 6 October 1969 , pp. 765 - 767
Copyright
© 1969 Cambridge University Press

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