Flow over and around submerged groynes

Numerical modelling and analysis of a groyne flume experiment

Master thesis (2019)

Authors

L.R. Ambagts Civil Engineering & Geosciences

Contributors

W.S.J. Uijttewaal Environmental Fluid Mechanics - CEG (supervisor 1)
E. Mosselman Rivers, Ports, Waterways and Dredging Engineering - CEG (supervisor 2)
R.J. Labeur Environmental Fluid Mechanics - CEG (supervisor 2)
C.J. Sloff Rivers, Ports, Waterways and Dredging Engineering - CEG (supervisor 2)
Mohamed Yossef Deltares (supervisor 2)
Faculty
Civil Engineering & Geosciences
Copyright: © 2019 Lindert Ambagts
Modelling Experiment Delft3D Groynes Weirs Krib Groyne Kribben Finel Sub-grid Parametrisations Weir formula Submerged BAW
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Published Date

05-06-2019

Language

English

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Faculty

Civil Engineering & Geosciences

Abstract

In submerged conditions groynes add resistance to a river, thereby increasing the water levels for a particular discharge. Groynes are modelled in two ways, either they are included in the bed topography when the grid resolution is sufficiently high or with a sub-grid parametrisation when the grid cell-size is larger than the geometry of the groyne. To investigate the flow patterns over and around groynes, data from a groyne flume experiment, as carried out by the BAW, is analysed. This to investigate to what extent a groyne behaves as a weir. The experiment is modelled in 2DH and in 3D to compare the performance of the sub-grid parametrisation with full 3D non-hydrostatic simulations.