Stratification Effects in Boundary Layer Flow Over Hills

The triple-deck analysis of boundary layer flow over topography is extended to include the effects of stable stratification in the free-stream. Analysis of the linearized three-dimensional flow shows that gravity waves generated in the outer region have a significant influence on the flow in the bou...

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Bibliographic Details
Published in:Proceedings of the Royal Society of London. Series A, Mathematical and physical sciences Mathematical and physical sciences, 1978-05, Vol.361 (1705), p.225-243
Main Author: Sykes, R. I.
Format: Article
Language:English
Subjects:
Amplitude
Boundary conditions
Boundary layers
Buoyancy
Flow velocity
Gravity waves
Hills
Pressure distribution
Skin friction
Velocity
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Summary:The triple-deck analysis of boundary layer flow over topography is extended to include the effects of stable stratification in the free-stream. Analysis of the linearized three-dimensional flow shows that gravity waves generated in the outer region have a significant influence on the flow in the boundary layer due to the interactive nature of the triple-deck structure. Numerical solution of the two-dimensional nonlinear equations shows the inhibition of separation by the stratification, and also gives larger amplitudes of the generated gravity waves than would be expected from the linearized theory.
ISSN:1364-5021
0080-4630
1471-2946
2053-9169
DOI:10.1098/rspa.1978.0100