Data/hora: 03/06/2024 08:31:59

Provedor de dados: | Institutional Archive of Ifreme (ArchiMer)
País: | France
Título: | Mixing parameterization: Impacts on rip currents and wave set-up
Autores: | Bennis, Anne-claire; Dumas, Franck; Ardhuin, Fabrice; Blanke, Bruno.
Data: | 2014-07
Ano: | 2014
Palavras-chave: | Bottom friction; Vertical mixing; Wave set-up; Nearshore processes.
Resumo: | Wave set-up is often underestimated by the models (e.g. Raubenheimer et al., 2001). Our paper discusses how the wave set-up may be changed by the inclusion of turbulent mixing in the bottom shear stress. The parameterization developed in Mellor (2002) for phase-averaged oscillatory boundary layer is used for this purpose. Two studies are carried out. The dependence of the parameterization on the vertical discretization and on the magnitude of the near-bottom wave orbital velocity is investigated. The function that distributes the turbulent terms over the vertical is modified, giving a good agreement with the average of the phase-resolved velocities, but an overestimation of the turbulent phase-resolved velocities. Applying that parameterization to simulate laboratory conditions in the presence of rip currents gives accurate magnitudes of the rip velocity, particularly in a fully coupled wave–current configuration, with an RMS error of about 4%. Compared to a model using the more standard Soulsby (1995) parameterization, the wave set-up is increased by about 12% when using the alternative parameterization. Thus the bottom shear stress is sensitive to the mixing parameterization with a possible effect of turbulence on the wave set-up. Further measurement and parameterization efforts are necessary for practical applications.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/00188/29970/28482.pdf

DOI:10.1016/j.oceaneng.2014.04.021

Editor: | Pergamon-elsevier Science Ltd

Relação:

http://archimer.ifremer.fr/doc/00188/29970/

info:eu-repo/grantAgreement/EC/FP7/240009

Formato: | application/pdf
Fonte: | Ocean Engineering (0029-8018) (Pergamon-elsevier Science Ltd), 2014-07 , Vol. 84 , P. 213-227

Fonte:

2014 Elsevier Ltd. All rights reserved.

info:eu-repo/semantics/openAccess