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Separation in oscillating laminar boundary-layer flows

Published online by Cambridge University Press:  29 March 2006

R. A. Despard  and
J. A. Miller
R. A. Despard
Affiliation:
Naval Postgraduate School, Monterey, California
J. A. Miller
Affiliation:
Naval Postgraduate School, Monterey, California
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Abstract

The results of an experimental investigation of separation in oscillating laminar boundary layers is reported. Instantaneous velocity profiles obtained with multiple hot-wire anemometer arrays reveal that the onset of wake formation is preceded by the initial vanishing of shear at the wall, or reverse flow, throughout the entire cycle of oscillation. Correlation of the experimental data indicates that the frequency, Reynolds number and dynamic history of the boundary layer are the dominant parameters and oscillation amplitude has a negligible effect on separation-point displacement.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 47 , Issue 1 , 14 May 1971 , pp. 21 - 31
Copyright
© 1971 Cambridge University Press

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