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Non-parallel stability of a flat-plate boundary layer using the complete Navier-Stokes equations

Published online by Cambridge University Press:  26 April 2006

H. Fasel  and
U. Konzelmann
H. Fasel
Affiliation:
Institut A für Mechanik, Universität Stuttgart, Stuttgart, FRG
U. Konzelmann
Affiliation:
Institut A für Mechanik, Universität Stuttgart, Stuttgart, FRG
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Abstract

Non-parallel effects which are due to the growing boundary layer are investigated by direct numerical integration of the complete Navier-Stokes equations for incompressible flows. The problem formulation is spatial, i.e. disturbances may grow or decay in the downstream direction as in the physical experiments. In the past various non-parallel theories were published that differ considerably from each other in both approach and interpretation of the results. In this paper a detailed comparison of the Navier-Stokes calculation with the various non-parallel theories is provided. It is shown, that the good agreement of some of the theories with experiments is fortuitous and that the difference between experiments and theories concerning the branch I neutral location cannot be explained by non-parallel effects.

Information

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 221 , December 1990 , pp. 311 - 347
Copyright
© 1990 Cambridge University Press

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