Numerical modelling of flow over sharp-crested rectangular contracted weir

Conference paper (2021)

Authors

B. Yildiz Mugla Sitki Kocman University, Rivers, Ports, Waterways and Dredging Engineering - CEG , Deltares
W.S.J. Uijttewaal Environmental Fluid Mechanics - CEG
J.D. Bricker University of Michigan
E. Mosselman Deltares, Rivers, Ports, Waterways and Dredging Engineering - CEG
Research Group
Rivers, Ports, Waterways and Dredging Engineering (CEG) (TU Delft)
Copyright: © 2021 B. Yildiz, W.S.J. Uijttewaal, J.D. Bricker, E. Mosselman
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Published Date

2021

Language

English

Faculty

Civil Engineering & Geosciences

Department

Hydraulic Engineering

Research Group

Rivers, Ports, Waterways and Dredging Engineering

Abstract

Weirs are flow control structures that can be used for flow diversion purposes. They are classified according to section geometry or their length in the flow direction. For sharp-crested rectangular weirs, Rehbock [1] derived stage-discharge equations. In contracted geometries, streamlines curve at the approach flow leading to variations in flow structures. For this case, [2] proposed an equation for discharge as a function of the opening rate at the section (ratio of opening width to total width, b/B). We developed CFD models to test their accuracy in modelling weir flow. For the contracted weir cases, flow structures were visualised upstream of the weir.