Turbulent Events around an Intermediately Submerged Boulder under Wake Interference Flow Regime
Publication: Journal of Hydraulic Engineering
Volume 147, Issue 7
Abstract
In-stream boulders significantly affect local flow hydrodynamics, sediment transport, and aquatic habitats. This study experimentally investigates the Reynolds shear stress (RSS) profiles and turbulent events around an intermediately submerged boulder under a wake interference flow regime. The frequency of turbulent events and their contribution to the RSS are quantified at two specific submergence ratios of 1.56 and 1.90 around the boulder in the near-bed and top-boulder regions. Ejection and sweep events were generally dominant in the near-bed and top-boulder regions. The dominance of turbulent events around the boulder varied as the submergence level changed. Relationships are proposed to predict the contribution of the near-bed turbulent events to the RSS around the boulder.
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Data Availability Statement
Some or all data (including ADV time series data and Reynolds shear stress profiles), models, or code (including MATLAB code) generated or used during the study are available from the corresponding author by request.
Acknowledgments
This research was made possible through grants from the Natural Sciences and Engineering Research Council (NSERC) of Canada and Diavik Diamond Mines, Inc. (DDMI). Financial support for Amir Golpira was provided by Clarkson University. The authors wish to thank Dr. William Wenming Zhang for his invaluable help in the lab measurements.
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Information
Published In
Journal of Hydraulic Engineering
Volume 147 • Issue 7 • July 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Aug 15, 2019
Accepted: Feb 10, 2021
Published online: Apr 30, 2021
Published in print: Jul 1, 2021
Discussion open until: Sep 30, 2021
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