Conference proceeding
Validation of a new model to account for bed slope effect for prediction of equilibrium condition in loose bed channels with significant suspended sediment transport
RIVER FLOW 2006, VOLS 1 AND 2, p.779
2006
Abstract
A fully three-dimensional non-hydrostatic model (Zeng et al., 2005a, 2005b, 2006) using RANS models without wall functions and with capabilities to account for bed roughness effects in open channels and river reaches is used to predict the equilibrium flow, suspended and bed load sediment transport, and bathymetry in the S-shaped channel with vertical lateral walls (case CH13) studied experimentally by Onishi (1972). The bed load transport is modeled using a non-equilibrium model. A new procedure is proposed to account in a consistent way for bed slope gravitational force effects not only for the bed load transport component, as was done in the original formulation of the model, but also for the suspended sediment load. The calculations are started with a flat bed. The bed levels, streamwise velocity and suspended sediment concentration profiles are compared with experimental data at several sections. It is found that though the predictions of the streamwise velocity and concentration profiles given by the original and new versions are very similar, the new version of the model yields better agreement with the experimental data for the bed level profiles.
Details
- Title: Subtitle
- Validation of a new model to account for bed slope effect for prediction of equilibrium condition in loose bed channels with significant suspended sediment transport
- Creators
- J ZengG ConstantinescuL Weber
- Contributors
- A H Cardoso (Editor)
- Resource Type
- Conference proceeding
- Publication Details
- RIVER FLOW 2006, VOLS 1 AND 2, p.779
- Language
- English
- Date published
- 2006
- Academic Unit
- Civil and Environmental Engineering
- Record Identifier
- 9984232154602771
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