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

DSpace/Manakin Repository


Search DR-NTU

Advanced Search Subject Search


My Account

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

Show full item record

Title: Analysis of velocity lag in sediment-laden open channel flows.
Author: Cheng, Nian-Sheng
Copyright year: 2004
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.
Subject: DRNTU::Engineering::Civil engineering::Water resources.
Type: Journal Article
Series/ Journal Title: Journal of hydraulic engineering
School: School of Civil and Environmental Engineering
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)].

Files in this item

Files Size Format View

DOI Query

- Get published version (via Digital Object Identifier)

This item appears in the following Collection(s)

Show full item record


Total views

All Items Views
Analysis of velocity lag in sediment-laden open channel flows. 291

Total downloads

All Bitstreams Views
ASCE JHE 2004 Analysis of Velocity Lag in Sediment-Laden Open Channel Flows.pdf 5

Top country downloads

Country Code Views
China 78
United States of America 57
Singapore 23
Iran 5
Unknown Country 4

Top city downloads

city Views
Beijing 62
Mountain View 38
Singapore 22
Redwood City 4
Taiyüan 4