Flow Patterns and Turbulence Structures in a Scour Hole Downstream of a Submerged Weir
Publication: Journal of Hydraulic Engineering
Volume 140, Issue 1
Abstract
Scouring downstream of submerged weirs is a common problem resulting from the interaction of the three-dimensional turbulent flow field around the structures and the mobile channel bed. This paper presents the distributions of flow patterns, bed shear stresses, and turbulence structures in the approach flow and the scour hole downstream of a submerged weir. The experiments were conducted under the clear-water scour condition for an equilibrium scour hole. The experimental results show that the flow structures are considerably changed by the presence of the structure. A large recirculation zone and a flow reattachment region are formed downstream of the submerged weir. Strongly paired cellular secondary flows are observed in the scour hole. The turbulence structures ahead of the recirculation zone govern the dimensions of the scour hole.
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Acknowledgments
The authors would like to thank China Scholarship Council (CSC) for the financial support of this research.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 140 • Issue 1 • January 2014
Pages: 68 - 76
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Aug 9, 2012
Accepted: Jul 16, 2013
Published ahead of production: Oct 3, 2013
Published online: Dec 16, 2013
Published in print: Jan 1, 2014
Discussion open until: May 16, 2014
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