Local Scour on Noncohesive Beds by a Submerged Horizontal Circular Wall Jet
Publication: Journal of Hydraulic Engineering
Volume 145, Issue 9
Abstract
Local scour on noncohesive beds caused by horizontal circular wall jets in submerged environments is investigated in this study. The effects of the ratios of sediment size-to-hydraulic radius, , on the jet scour are considered. A total of 420 datasets of previous observations are compiled and 12 laboratory experiments in the range of 0.44–2.44 are conducted to investigate the effect of on scour dimensions. A dimensional analysis shows that both the particle gravity and bed resistance to the flow play important roles in the scour. Analysis on the data shows that the maximum scour dimensions vary linearly with the densimetric Froude number and nonmonotonically with a manner of a Gaussian function of , respectively. Finally, the formulas to predict the maximum scour dimensions of a submerged horizontal circular wall jet are proposed, which are fairly well in line with existing laboratory and field data.
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Acknowledgments
This study was supported by the United Fund of Ministry of Education of People’s Republic of China (Grant No. 6141A02022337).
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Published In
Journal of Hydraulic Engineering
Volume 145 • Issue 9 • September 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Jul 11, 2018
Accepted: Jan 30, 2019
Published online: Jun 24, 2019
Published in print: Sep 1, 2019
Discussion open until: Nov 24, 2019
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