Turbulence Modeling and Wave-Current Interactions

Type Article
Date 2015
Language English
Other localization https://publications.waset.org/10000494/pdf
Author(s) Bennis Anne-Claire1, Dumas Franck2, Ardhuin FabriceORCID3, Blanke Bruno3
Source International Journal of Environmental and Ecological Engineering (World Academy of Science, Engineering and Technology), 2015 , Vol. 9 , N. 1 , P. 111-117
Keyword(s) Numerical modeling, Rip currents, Turbulence modeling, Wave-current interactions

The mechanics of rip currents are complex, involving interactions between waves, currents, water levels and the bathymetry, that present particular challenges for numerical models. Here, the effects of a grid-spacing dependent horizontal mixing on the wave-current interactions are studied. Near the shore, wave rays diverge from channels towards bar crests because of refraction by topography and currents, in a way that depends on the rip current intensity which is itself modulated by the horizontal mixing. At low resolution with the grid-spacing dependent horizontal mixing, the wave motion is the same for both coupling modes because the wave deviation by the currents is weak. In high resolution case, however, classical results are found with the stabilizing effect of the flow by feedback of waves on currents. Lastly, wave-current interactions and the horizontal mixing strongly affect the intensity of the three-dimensional rip velocity.

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Bennis Anne-Claire, Dumas Franck, Ardhuin Fabrice, Blanke Bruno (2015). Turbulence Modeling and Wave-Current Interactions. International Journal of Environmental and Ecological Engineering, 9(1), 111-117. Open Access version : https://archimer.ifremer.fr/doc/00601/71288/