Simulation of breaking focused waves over a slope with a cfd based numerical wave tank
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Inclou dades d'ús des de 2022
Cita com:
hdl:2117/331952
Tipus de documentText en actes de congrés
Data publicació2017
EditorCIMNE
Condicions d'accésAccés obert
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Abstract
Extreme wave conditions are always identified with large-amplitude breaking waves in
shallow waters. Focused waves can often be used to describe extreme waves which
evolve during the nonlinear wave-wave interaction, occurring at one point in space and time.
Under- standing breaking focused waves has many design-related implications for the design of
offshore wind turbine (OWT) substructures in shallow waters. The main objective of the paper is to
model breaking focused waves over a sloping seabed and study the breaking characteristics us- ing
the open-source CFD model REEF3D. The numerical model describes the two-phase flow using the
incompressible Reynolds-Averaged Navier-Stokes (RANS) equations together with the continuity
equation. The model uses a fifth-order WENO scheme for convection discretization and a third order
Runge-Kutta scheme for time discretization along with the level set method to obtain the free
surface, yielding accurate wave propagation in the numerical wave tank. Solid boundaries are
accounted through the ghost cell immersed boundary method. The free surface is modeled with the
level set method. Turbulence is described with the two-equation k −ω model. In the numerical
wave tank, the focused waves are generated using a single flap-type maker theory. The
numerical results are in good agreement with experimental results for complex free surface
elevations measured at several locations along the wave tank. The numerical aspects related to the
development of the breaking process are investigated together with the evolution of focusing wave
group in the numerical wave tank. Further, the study also examines the free
surface flow features that evolve during the breaking process.
CitacióAlagan Chella, M. [et al.]. Simulation of breaking focused waves over a slope with a cfd based numerical wave tank. A: MARINE VII. "MARINE VII : proceedings of the VII International Conference on Computational Methods in Marine Engineering". CIMNE, 2017, p. 693-703. ISBN 978-84-946909-8-3.
ISBN978-84-946909-8-3
Fitxers | Descripció | Mida | Format | Visualitza |
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Marine-2017-56_SIMULATION OF BREAKING FOCUSED.pdf | 1,717Mb | Visualitza/Obre |