Analysis of Suspended Sediment Transport in Open-Channel Flows: Kinetic-Model-Based Simulation
Publication: Journal of Hydraulic Engineering
Volume 134, Issue 3
Abstract
This paper presents a comprehensive analysis of suspended sediment transport in open channels under various flow conditions through a kinetic-model-based simulation. The kinetic model, accounting for both sediment-turbulence and sediment-sediment interactions, successfully represents experimentally observed diffusion and transport characteristics of suspended sediments with different densities and sizes. Without tuning any model coefficients, the nonmonotonic concentration distribution and the noticeable lag velocity with a negative value close to the wall are reasonably reproduced. Examination of flow conditions typical of suspension dominated rivers shows that the conventional method may overestimate or underestimate unit suspended-sediment discharge, depending on the Rouse number, sediment size, as well as shear velocity. The error may be less than 20% for and might exceed 60% for under typical flow conditions where shear velocity ranges from and flow depth ranges from .
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Acknowledgments
The writers gratefully acknowledge the financial support of the National Science Foundation of China (Grant Nos. NSFC50309007 and NSFC50221903). The valuable comments and suggestions of the three anonymous referees contributed to greatly improving this paper.
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Information & Authors
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Published In
Journal of Hydraulic Engineering
Volume 134 • Issue 3 • March 2008
Pages: 328 - 339
Copyright
© 2008 ASCE.
History
Received: Apr 26, 2005
Accepted: Nov 5, 2007
Published online: Mar 1, 2008
Published in print: Mar 2008
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