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Some properties of sink-flow turbulent boundary layers

Published online by Cambridge University Press:  29 March 2006

W. P. Jones  and
B. E. Launder
W. P. Jones
Affiliation:
Department of Mechanical Engineering, Imperial College, London Present address: Lehrstuhl für Technische Thermodynamik, Technische Hochschule, Aachen, West Germany.
B. E. Launder
Affiliation:
Department of Mechanical Engineering, Imperial College, London
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Abstract

An experimental study of asymptotic sink-flow turbulent boundary layers is reported. Three levels of acceleration corresponding to values of the acceleration parameter K of 1·5 × 10−6, 2·5 × 10×6 and 3·0 × 10×6 have been examined. In addition to mean velocity profiles, measurements have been obtained of the profiles of longitudinal turbulence intensity, and, for the lowest value of K, of the lateral and transverse components as well. Measurements at selected positions in the boundary layer of the power spectral density indicate that none of the boundary layers exhibit an inertial subrange; for the steepest acceleration, in particular, throughout the boundary layer the spectrum shapes are similar in form to those reported within the viscous sublayer of a high Reynolds number turbulent flow.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 56 , Issue 2 , 28 November 1972 , pp. 337 - 351
Copyright
© 1972 Cambridge University Press

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