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Title: Measurements of fluctuation in drag acting on rigid cylinder array in open channel flow
Authors: Zhao, Kuifeng
Cheng, Nian-Sheng
Wang, Xikun
Tan, Soon Keat
Keywords: DRNTU::Engineering::Civil engineering::Water resources
Issue Date: 2014
Source: Zhao, K., Cheng, N.-S., Wang, X., & Tan, S. K. (2014). Measurements of Fluctuation in Drag Acting on Rigid Cylinder Array in Open Channel Flow. Journal of Hydraulic Engineering, 140(1), 48-55.
Series/Report no.: Journal of hydraulic engineering
Abstract: In this study, an array of rigid cylindrical rods was used to simulate emergent vegetation stems that were subject to unidirectional open channel flows. The instantaneous drag force experienced by the rods was measured with a load cell. In addition, the particle image velocimetry (PIV) technique was applied to sample the flow information in a horizontal plane, and wave gauges were used to record the fluctuation in the water-surface elevation. The results show that the drag fluctuation normalized by the mean value may reach as high as 133% when the Reynolds number (defined based on the stem diameter) varied in the range from 400 to 1,100. High fluctuations were also observed in the flow velocity and flow depth under similar flow conditions.
ISSN: 0733-9429
DOI: 10.1061/(ASCE)HY.1943-7900.0000811
Schools: School of Civil and Environmental Engineering 
Research Centres: Maritime Research Centre 
Rights: © 2014 American Society of Civil Engineers. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Hydraulic Engineering, American Society of Civil Engineers. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI:]
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles

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