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Comparison of numerical models for wave overtopping and impact on a sea wall
Vanneste, D.; Altomare, C.; Suzuki, T.; Troch, P.; Verwaest, T. (2014). Comparison of numerical models for wave overtopping and impact on a sea wall, in: Lynett, P. (Ed.) Proceedings of 34th Conference on Coastal Engineering, Seoul, Korea, 2014. Coastal Engineering Proceedings, 34: pp. [1-14]
In: Lynett, P. (Ed.) (2014). Proceedings of 34th Conference on Coastal Engineering, Seoul, Korea, 2014. Coastal Engineering Proceedings, 34. Coastal Engineering Research Council: [s.l.]. ISBN 978-0-9896611-2-6. , more
In: Coastal Engineering Proceedings. American Society of Civil Engineers (ASCE): New York. ISSN 2156-1028, more

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Document type: Conference paper

Keywords
    Numerical models
    Software validation > Validation
    Structures > Hydraulic structures > Coastal structures > Coast defences > Sea walls
    Wave overtopping
    Marine/Coastal
Author keywords
    Wave impact,; Wave flume experiment

Authors  Top 

Abstract
    The paper discusses three different numerical models in a study of wave overtopping and impact on a sea wall. The models used are SWASH (based on the nonlinear shallow water equations), DualSPHysics and FLOW-3D (both based on the full Navier-Stokes equations). The models are validated against experimental measurements in a setup with a quay wall and berm in front of the sea wall. The two models based on the full Navier-Stokes equations provide good estimates of the wave impact on the sea wall. Moreover, reasonable agreement with experimental values of averaged overtopping discharges was found for the full test time series simulated with FLOW-3D. Notwithstanding the SWASH model provides reasonable estimates for the wave overtopping on a simple quay wall, at a significantly lower computational cost than the other two models, it clearly underrates the overtopping discharge in the case of a combination of a quay wall, berm and sea wall. Further investigation is needed to draw conclusions on the model accuracy of SWASH in such a case.

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