Imperial College London
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Stephan Kramer

Faculty of Engineering, Department of Earth Science & Engineering

Advanced Research Fellow
 
 
 
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Contact

 

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Location

 

4.85Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Vouriot:2019:10.1007/s10652-018-9626-4,
author = {Vouriot, C and Angeloudis, A and Kramer, S and Piggott, M},
doi = {10.1007/s10652-018-9626-4},
journal = {Environmental Fluid Mechanics},
pages = {329--348},
title = {Fate of large-scale vortices in idealized tidal lagoons},
url = {http://dx.doi.org/10.1007/s10652-018-9626-4},
volume = {19},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The generation and evolution of tidally-induced vortices in coastal and estuarine regions can influence water quality and sedimentary processes. These effects must be taken into consideration in the development of coastal reservoirs, barrages and lagoons, among other environmental flow applications. Results are presented here on the fate of large-scale vortices within confined tidally-forced domains. A computational approach is employed using the Thetis depth-averaged coastal ocean modeling framework. Initially, two test cases serve to demonstrate model capability in capturing the formation of dipoles downstream of oscillatory flow channels. Diagnostic quantities of vorticity and localized circulation are used to track the 2-D vortex evolution and dissipation. This approach is then applied to tidal lagoon geometries, where flows through the inlet induce a pair of counter rotating vortices (dipoles). Idealized model geometries and inlet conditions are used to determine the impact of three design parameters on large-scale vortical structures: (a) the lagoon geometry aspect ratio in the horizontal plane, (b) the inlet width and (c) the bathymetry profile as the coastline is approached. The dependence of vortex flushing behavior on the dimensionless ratio Wi/UT (where Wi is the width of the inlet channel, U is the maximum velocity and T is the tidal period) is reaffirmed, while the side walls and the sloping bathymetry are found to affect the vortex dissipation process.
AU  - Vouriot,C
AU  - Angeloudis,A
AU  - Kramer,S
AU  - Piggott,M
DO  - 10.1007/s10652-018-9626-4
EP  - 348
PY  - 2019///
SN  - 1567-7419
SP  - 329
TI  - Fate of large-scale vortices in idealized tidal lagoons
T2  - Environmental Fluid Mechanics
UR  - http://dx.doi.org/10.1007/s10652-018-9626-4
UR  - http://hdl.handle.net/10044/1/64094
VL  - 19
ER  -
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