Velocity distribution and 3D turbulence characteristic analysis for flow over water-worked rough bed
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2017Keyword
Smooth bedRough bed
Water-worked bed
Near-bed flow
Uniform flow
Velocity distribution
Turbulence intensity
Reynolds stress
3D turbulence characteristics
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© 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
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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.Version
Published versionCitation
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.Link to Version of Record
https://doi.org/10.3390/w9090668Type
Articleae974a485f413a2113503eed53cd6c53
https://doi.org/10.3390/w9090668