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A comparison of turbulent pipe, channel and boundary layer flows

Published online by Cambridge University Press:  27 July 2009

J. P. MONTY ,
N. HUTCHINS ,
H. C. H. NG ,
I. MARUSIC  and
M. S. CHONG
J. P. MONTY*
Affiliation:
Department of Mechanical Engineering, University of Melbourne, VIC 3010, Australia
N. HUTCHINS
Affiliation:
Department of Mechanical Engineering, University of Melbourne, VIC 3010, Australia
H. C. H. NG
Affiliation:
Department of Mechanical Engineering, University of Melbourne, VIC 3010, Australia
I. MARUSIC
Affiliation:
Department of Mechanical Engineering, University of Melbourne, VIC 3010, Australia
M. S. CHONG
Affiliation:
Department of Mechanical Engineering, University of Melbourne, VIC 3010, Australia
*
†Email address for correspondence: [email protected]
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Abstract

The extent or existence of similarities between fully developed turbulent pipes and channels, and in zero-pressure-gradient turbulent boundary layers has come into question in recent years. This is in contrast to the traditionally accepted view that, upon appropriate normalization, all three flows can be regarded as the same in the near-wall region. In this paper, the authors aim to provide clarification of this issue through streamwise velocity measurements in these three flows with carefully matched Reynolds number and measurement resolution. Results show that mean statistics in the near-wall region collapse well. However, the premultiplied energy spectra of streamwise velocity fluctuations show marked structural differences that cannot be explained by scaling arguments. It is concluded that, while similarities exist at these Reynolds numbers, one should exercise caution when drawing comparisons between the three shear flows, even near the wall.

Type
Papers
Information
Journal of Fluid Mechanics , Volume 632 , 10 August 2009 , pp. 431 - 442
Copyright
Copyright © Cambridge University Press 2009

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