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Some turbulent/non-turbulent properties of the outer intermittent region of a boundary layer

Published online by Cambridge University Press:  29 March 2006

Thomas B. Hedleyt  and
James F. Keffer
Thomas B. Hedleyt
Affiliation:
Department of Mechanical Engineering, University of Toronto Present address: Hatch Associates, Toronto.
James F. Keffer
Affiliation:
Department of Mechanical Engineering, University of Toronto
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Abstract

A detailed study of the intermittency in the outer region of a flat-plate turbulent boundary layer has been carried out using digital sampling and processing techniques. Conditional averages are used to generate mean and fluctuating components for the turbulent and non-turbulent zones of fluid. More particularly, point averages of these variables, taken with reference to the instantaneous position of the turbulent/non-turbulent interface, have been made to show the distribution of various quantities through the turbulent front. The results indicate that significant differences exist at leading and trailing edges of the turbulent bursts and a more complete picture of the motion of an average large eddy is deduced.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 64 , Issue 4 , 24 July 1974 , pp. 645 - 678
Copyright
© 1974 Cambridge University Press

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