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Velocity distribution and 3D turbulence characteristic analysis for flow over water-worked rough bed
Pu, Jaan H. Wei, J. Huang, Y.
Pu, Jaan H.
Wei, J.
Huang, Y.
Publication Date
2017
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Rights
© 2017 by the authors. Submitted for possible open access publication under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Peer-Reviewed
Yes
Open Access status
openAccess
Accepted for publication
2017-09-01
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Abstract
To reproduce the natural flow topography in a laboratory environment, it is crucial to recapture its bed condition in order to ensure the accurate representation. Water-worked bed represents a state-of-the-art experimentally formed bed to imitate the natural-formed channel in most rivers or natural streams. Recently, this technique has been intensively studied through experimental and computational approaches; however, its actual influence towards the near-bed flow as compared to experimentally prepared rough bed in well-packed bedform order are still yet to be investigated deeply. This experimental study systematically investigated and compared the differences in velocity distribution and three-dimensional (3D) turbulence characteristics, including turbulence intensities and Reynolds stresses, between uniform smooth bed, laboratory-prepared rough bed and water-worked bed open channel flows. The flow comparisons were concentrated at near-bed region where clear flow behaviour change can be observed. Through these comparisons, the study inspected the characteristics of water-worked bedform thoroughly, in order to inform future experimental research that tries to reproduce natural stream behaviours.
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Published version
Citation
Pu JH, Wei J and Huang Y (2017) Velocity distribution and 3D turbulence characteristic analysis for flow over water-worked rough bed. Water. 9(9): 668.
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Article