Direct Numerical Simulation of Turbulent Flow in a Square Duct: Analysis of Secondary Flows
Publication: Journal of Engineering Mechanics
Volume 133, Issue 2
Abstract
A direct numerical simulation of turbulent flow in a square duct was performed for a Reynolds number based on bulk streamwise velocity and duct height equal to 4,440. The mechanism by which secondary flows are generated in a square duct was investigated. Two counterrotating secondary flows occur around the duct corner. These secondary flows were found to play a key role in momentum transfer between the corner and center of the duct. A conditional quadrant analysis was performed in the local maximum and minimum regions of the wall shear stress in order to characterize the pattern of the mean secondary flows.
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Acknowledgments
This research was partly supported by 21st Century Frontier Research Program (Code No. 2–3–2 from Sustainable Water Resources Research Center) of the Ministry of Science of Technology in Korea. The writers would like to thank Professor Sedat Biringen, Aerospace Engineering Sciences, University of Colorado at Boulder, who kindly provided the simulation data in Huser and Biringen (1993).
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 133 • Issue 2 • February 2007
Pages: 213 - 221
Copyright
© 2007 ASCE.
History
Received: Oct 28, 2003
Accepted: Sep 28, 2005
Published online: Feb 1, 2007
Published in print: Feb 2007
Notes
Note. Associate Editor: Robert J. Martinuzzi
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