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Analysis of velocity lag in sediment-laden open channel flows.

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Analysis of velocity lag in sediment-laden open channel flows.

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dc.contributor.author Cheng, Nian-Sheng
dc.date.accessioned 2012-03-22T07:45:04Z
dc.date.available 2012-03-22T07:45:04Z
dc.date.copyright 2004
dc.date.issued 2012-03-22
dc.identifier.citation Cheng, N. S. (2004). Analysis of velocity lag in sediment-laden open channel flows. Journal of Hydraulic Engineering, 130(7), 657–666.
dc.identifier.issn 0733-9429 (print)
dc.identifier.uri http://hdl.handle.net/10220/7663
dc.description.abstract Laboratory experiments have recently confirmed that the streamwise particle velocity is largely less than that of the fluid in sediment-laden flows. This velocity lag is investigated analytically in the present study based on the drag force exerting on a particle in the presence of other neighbors. The normalized drag force or the hindrance coefficient is found generally dependent on the particle concentration, particle Reynolds number, and specific gravity. The velocity lag is then derived by relating the hindrance coefficient to the shear stress distribution for uniform sediment-laden open channel flows. The analysis shows that the profile of the velocity lag, when normalized by the shear velocity, is associated with the shear Reynolds number, dimensionless particle diameter, and specific gravity. For the dilute condition, the velocity lag distribution varies only with the shear Reynolds number, and the lag can be ignored if the shear Reynolds number is less than unity. The theoretical predictions are comparable to limited experimental results.
dc.format.extent 43 p.
dc.language.iso en
dc.relation.ispartofseries Journal of hydraulic engineering
dc.rights © 2004 ASCE. 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:http://dx.doi.org/10.1061/(ASCE)0733-9429(2004)130:7(657)].
dc.subject DRNTU::Engineering::Civil engineering::Water resources.
dc.title Analysis of velocity lag in sediment-laden open channel flows.
dc.type Journal Article
dc.contributor.school School of Civil and Environmental Engineering
dc.identifier.doi http://dx.doi.org/10.1061/(ASCE)0733-9429(2004)130:7(657)

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