Research Article
Jul 1981
Secondary Flow, Shear Stress and Sediment Transport
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VIEW THE REPLYAuthors: Chao-Lin Chiu, M.ASCE, and David E. HsiungAuthor Affiliations
Publication: Journal of the Hydraulics Division
Volume 107, Issue 7
Abstract
A mathematical modeling and computational technique is presented which is capable of treating and dealing with interactions among hydraulic variables is open channel flows, such as the distribution of primary flow velocity, channel cross section, discharge rate, secondary flow, shear stress, and sediment concentration. A shear stress formula is presented that can include the effect of secondary flow. The formula gives peak values of boundary shear that occur on the channel bottom near the corners and on the side walls. Such peak values of boundary shear are owing to the momentum transfer to the region by secondary flow. The simulation technique can be used as a decision-making tool in selecting engineering designs and controls for channel protections. The main role of secondary flow in sediment transport seems to be to transport sediments in the transverse direction, whereas the gravity brings sediments downward and the diffusion brings sediment particles upward. The vertical component of secondary flow seems to help gravity bring sediment down in most of the area in a transverse cross section of a channel.
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Published In
Journal of the Hydraulics Division
Volume 107 • Issue 7 • July 1981
Pages: 879 - 898
Copyright
© 1981 American Society of Civil Engineers.
History
Published in print: Jul 1981
Published online: Feb 3, 2021
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Authors
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Chao-Lin Chiu, M.ASCE
Prof. of Civ. Engrg., Univ. of Pittsburgh, Pittsburgh, Pa.
David E. Hsiung
Engr., General Electric Company, Rockville, Md., formerly, Research Asst., Dept. of Civ. Engrg., Univ. of Pittsburgh, Pittsburgh, Pa.
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