Wave forced vorticity and dissipation scaling on a rip channeled beach

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dc.contributor.authorSuarez, Leandro
dc.contributor.authorCienfuegos, Rodrigo
dc.contributor.authorMichallet, Herve
dc.contributor.authorBarthelemy, Eric
dc.date.accessioned2025-01-20T20:07:20Z
dc.date.available2025-01-20T20:07:20Z
dc.date.issued2023
dc.description.abstractRip-currents, commonly observed on natural beaches, are vorticity induced and part of large scale near-shore circulations. The questions arise: how do bathymetric gradients magnitudes relate to rip velocities? how does rip current vorticity scale with wave characteristics and dissipation? What is the dynamics of the large scale 2D vorticity? To address these questions, we utilize a Non Linear Shallow Water model with a shock-capturing scheme. It is validated with preexisting experiments of wave induced rip-currents on uneven bathymetries generated by irregular waves. To do so the enstrophy (spatially averaged square of the vorticity) is shown to be a relevant metric to calibrate the bottom friction coefficient of the model. The numerical study based on a large number of simulations with monochromatic wave forcing shows that the more non-uniform the bathymetry is, the stronger the gradients in wave dissipation are and the stronger the enstrophy is. The rip current velocity is shown to linearly increase with the square root of the local enstrophy. The wave-averaged shallow water vorticity equation terms are evaluated. It is suggested that large scale 2D vorticity dynamics mainly result from an equilibrium between vorticity production, vorticity advection by the circulation and dissipation by bottom friction.& COPY; 2023 Elsevier Masson SAS. All rights reserved.
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.euromechflu.2023.04.011
dc.identifier.eissn1873-7390
dc.identifier.issn0997-7546
dc.identifier.urihttps://doi.org/10.1016/j.euromechflu.2023.04.011
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/91790
dc.identifier.wosidWOS:001053809800001
dc.language.isoen
dc.pagina.final166
dc.pagina.inicio149
dc.revistaEuropean journal of mechanics b-fluids
dc.rightsacceso restringido
dc.subjectRip current
dc.subjectVorticity
dc.subjectDifferential breaking
dc.subjectNumerical modeling
dc.subjectEnstrophy
dc.subject.ods14 Life Below Water
dc.subject.ods13 Climate Action
dc.subject.odspa14 Vida submarina
dc.subject.odspa13 Acción por el clima
dc.titleWave forced vorticity and dissipation scaling on a rip channeled beach
dc.typeartículo
dc.volumen101
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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