Print Email Facebook Twitter On the accuracy of internal wave generation method in a non-hydrostatic wave model to generate and absorb dispersive and directional waves Title On the accuracy of internal wave generation method in a non-hydrostatic wave model to generate and absorb dispersive and directional waves Author Vasarmidis, Panagiotis (Universiteit Gent) Stratigaki, Vasiliki (Universiteit Gent) Suzuki, T. (TU Delft Environmental Fluid Mechanics; Flanders Hydraulics Research) Zijlema, Marcel (TU Delft Environmental Fluid Mechanics) Troch, Peter (Universiteit Gent) Date 2021 Abstract The weakly reflective wave generation is a wave generation and absorption method in phase-resolving models, based on the assumption that the waves propagating towards the wave generation boundary are small amplitude shallow water waves with direction perpendicular to the boundary. This assumption makes the method weakly reflective for dispersive and directional waves. The internal wave generation method was proposed by Vasarmidis et al. (2019b) as an alternative, for the non-hydrostatic wave model, SWASH, to avoid reflections. In this study, a comparison is made between the performance of the new internal wave generation method and the weakly reflective wave generation method. It is shown that using the internal wave generation leads to a significantly more accurate prediction of the resulting wave field in case of waves reflected back to the numerical boundary. Additionally, the internal wave generation method is extended to short-crested waves and SWASH is validated for the first time with experimental data for the cases of wave propagation over a shoal and wave diffraction around a wall. The proposed extended internal wave generation method increases the capability of SWASH towards the study of wave propagation of highly dispersive short-crested waves in coastal environments with minimal reflection from the boundaries. Subject Internal wave generationNon-hydrostatic wave modelShort-crested wavesSWASHWeakly reflective wave generation To reference this document use: http://resolver.tudelft.nl/uuid:e4e9d7c5-2447-419e-8d0c-755faa725595 DOI https://doi.org/10.1016/j.oceaneng.2020.108303 Embargo date 2021-07-01 ISSN 0029-8018 Source Ocean Engineering, 219, 1-14 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2021 Panagiotis Vasarmidis, Vasiliki Stratigaki, T. Suzuki, Marcel Zijlema, Peter Troch Files PDF 1_s2.0_S002980182031218X_main.pdf 9.06 MB Close viewer /islandora/object/uuid:e4e9d7c5-2447-419e-8d0c-755faa725595/datastream/OBJ/view