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On the limitations of Taylor's hypothesis in constructing long structures in a turbulent boundary layer

Published online by Cambridge University Press:  16 October 2008

DAVID J. C. DENNIS  and
TIMOTHY B. NICKELS
DAVID J. C. DENNIS
Affiliation:
Department of Engineering, Cambridge University, Trumpington Street, Cambridge, CB2 1PZ, UK
TIMOTHY B. NICKELS
Affiliation:
Department of Engineering, Cambridge University, Trumpington Street, Cambridge, CB2 1PZ, UK
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Abstract

Taylor's hypothesis of frozen flow has frequently been used to convert temporal experimental measurements into a spatial domain. This technique has led to the discovery of long meandering structures in the log-region of a turbulent boundary layer. There is some contention over whether Taylor's approximation is valid over large distances. This paper presents an experiment that compares velocity fields constructed using Taylor's approximation with those obtained from particle image velocimetry (PIV), i.e. spatial data, obtained in the logarithmic region of a turbulent boundary layer.

Type
Papers
Information
Journal of Fluid Mechanics , Volume 614 , 10 November 2008 , pp. 197 - 206
Copyright
Copyright © Cambridge University Press 2008

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