The Modelling of Compound Channel Flow: Physical Model of River Blackwater

Rameshwaran, P.; Sun, X.; Shiono, K.; Chandler, J. H.; Sellin, R. H. J.. 2008 The Modelling of Compound Channel Flow: Physical Model of River Blackwater. In: Altinakar, M. S; Kokpinar, M. A.; Aydin, I.; Cokgor, S.; Kirkgoz, S., (eds.) River Flow 2008 - Proceedings of the International Conference on Fluvial hydraulics. Turkey, Kubaba Congress Department and Travel Services, 555-564.

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This paper compares results derived from a physical model representing the River Blackwater, to numerical simulation using both a two-dimensional (2D) and three-dimensional (3D) model. The 2D model solves the shallow water depth-averaged continuity and Navier-Stokes equations with the depth-averaged form of the k −ε turbulence model for free surface flow. The 3D model solves the three-dimensional Reynolds-averaged continuity and Navier-Stokes equations with the renormalization group (RNG) k −ε turbulence model for steady-state flow. The model results are evaluated against the experimental data obtained from a 1:5 scale physical model of the River Blackwater, located at the UK Flood Channel Facility. The predicted distributions of the streamwise velocity, secondary vectors and bed shear stress are used to investigate the flow processes along the channel. The 2D and 3D model results show that the three-dimensional model predicts the flow fields much better than the two-dimensional model.

Item Type: Publication - Book Section
Programmes: CEH Programmes pre-2009 publications > Water > WA02 Quantifying processes that link water quality and quantity, biota and physical environment > WA02.2 Hydrochemical and sediment processes
UKCEH and CEH Sections/Science Areas: Acreman
ISBN: 9786056013614
Additional Keywords: Compound channel, Numerical model, Overbank flow, River Blackwater, Roughness
NORA Subject Terms: Ecology and Environment
Earth Sciences
Electronics, Engineering and Technology
Date made live: 19 Nov 2008 12:42 +0 (UTC)

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