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Fully developed turbulent pipe flow: a comparison between direct numerical simulation and experiment

Published online by Cambridge University Press:  26 April 2006

J. G. M. Eggels ,
F. Unger ,
M. H. Weiss ,
J. Westerweel ,
R. J. Adrian ,
R. Friedrich  and
F. T. M. Nieuwstadt
J. G. M. Eggels
Affiliation:
Delft University of Technology, Laboratory for Aero- and Hydrodynamics, Rotterdamseweg 145, 2628 AL Delft, The Netherlands
F. Unger
Affiliation:
Lehrstuhl für Fluidmechanik, Technische Universität München, Arcisstrasse 21, 8000 München 2, Germany
M. H. Weiss
Affiliation:
Novacor Research & Technology Corporation, 2928 – 16th Street NE, Calgary, Alberta T2E 7K7, Canada
J. Westerweel
Affiliation:
Delft University of Technology, Laboratory for Aero- and Hydrodynamics, Rotterdamseweg 145, 2628 AL Delft, The Netherlands
R. J. Adrian
Affiliation:
University of Illinois at Urbana-Champaign, Department of Theoretical and Applied Mechanics, 104 South Wright Street, Urbana, IL 61801, USA
R. Friedrich
Affiliation:
Lehrstuhl für Fluidmechanik, Technische Universität München, Arcisstrasse 21, 8000 München 2, Germany
F. T. M. Nieuwstadt
Affiliation:
Delft University of Technology, Laboratory for Aero- and Hydrodynamics, Rotterdamseweg 145, 2628 AL Delft, The Netherlands
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Abstract

Direct numerical simulations (DNS) and experiments are carried out to study fully developed turbulent pipe flow at Reynolds number Rec ≈ 7000 based on centreline velocity and pipe diameter. The agreement between numerical and experimental results is excellent for the lower-order statistics (mean flow and turbulence intensities) and reasonably good for the higher-order statistics (skewness and flatness factors). To investigate the differences between fully developed turbulent flow in an axisymmetric pipe and a plane channel geometry, the present DNS results are compared to those obtained from a channel flow simulation. Beside the mean flow properties and turbulence statistics up to fourth order, the energy budgets of the Reynolds-stress components are computed and compared. The present results show that the mean velocity profile in the pipe fails to conform to the accepted law of the wall, in contrast to the channel flow. This confirms earlier observations reported in the literature. The statistics on fluctuating velocities, including the energy budgets of the Reynolds stresses, appear to be less affected by the axisymmetric pipe geometry. Only the skewness factor of the normal-to-the-wall velocity fluctuations differs in the pipe flow compared to the channel flow. The energy budgets illustrate that the normal-to-the-wall velocity fluctuations in the pipe are altered owing to a different ‘impingement’ or ‘splatting’ mechanism close to the curved wall.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 268 , 10 June 1994 , pp. 175 - 210
Copyright
© 1994 Cambridge University Press

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