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Presentation of a family of turbulence closure models for stratified shallow water flows and preliminary application to the Rhine outflow region Luyten, P.J.; Deleersnijder, E.; Ozer, J.; Ruddick, K.G. (1996). Presentation of a family of turbulence closure models for stratified shallow water flows and preliminary application to the Rhine outflow region. Cont. Shelf Res. 16(1): 101-130 In: Continental Shelf Research. Pergamon Press: Oxford; New York. ISSN 0278-4343; e-ISSN 1873-6955, meer

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Beschikbaar in	Auteurs
VLIZ: Open access 262868 [ download pdf ]

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Trefwoorden

Models Motion > Fluid motion > Fluid flow > Stratified flow Motion > Fluid motion > Fluid flow > Turbulent flow Outflow Utilization Water > Shallow water Europe, Rhine R. [Marine Regions] Marien/Kust

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Auteurs		Top
Luyten, P.J., meer Deleersnijder, E., meer Ozer, J., meer Ruddick, K.G., meer

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Abstract

Three turbulence closure schemes, designed for stratified shallow water flows, are presented. They are based upon mu - epsilon theory and use respectively two, one or zero transport equations for turbulent variables. The models are first tested on the evolution of a wind-driven turbulent layer in a stratified fluid. The results are at least qualitatively in agreement with observational and experimental data. A discussion is given about the existence of self-similar solutions. The models are compared next with the observational data of the Rhine outflow area. The periodic variation in the density structure, forced by wind and tides and which is clearly visible in the data, is predicted by the model. A physical interpretation of the model results is given in the absence of wind forcing. The effects of estuarine circulation, tidal straining and mixing on the development or breakdown of stratificaiton are well represented by the model calculation.

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