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Unstructured Finite-Volume Model of Sediment Scouring Due to Wave Impact on Vertical Seawalls.

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Uh Zapata, Miguel, Pham Van Bang, Damien ORCID: https://orcid.org/0000-0001-8669-0724 et Nguyen, Kim Dan (2021). Unstructured Finite-Volume Model of Sediment Scouring Due to Wave Impact on Vertical Seawalls. Journal of Marine Science and Engineering , vol. 9 , nº 12. p. 1440. DOI: 10.3390/jmse9121440.

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Résumé

The numerical modeling of sediment transport under wave impact is challenging because of the complex nature of the triple wave–structure–sediment interaction. This study presents three-dimensional numerical modeling of sediment scouring due to non-breaking wave impact on a vertical seawall. The Navier–Stokes–Exner equations are approximated to calculate the full evolution of flow fields and morphodynamic responses. The bed erosion model is based on the van Rijn formulation with a mass-conservative sand-slide algorithm. The numerical solution is obtained by using a projection method and a fully implicit second-order unstructured finite-volume method in a σ-coordinate computational domain. This coordinate system is employed to accurately represent the free-surface elevation and sediment/water interface evolution. Experimental results of the velocity field, surface wave motion, and scour hole formation hole are used to compare and demonstrate the proposed numerical method’s capabilities to model the seawall scour.

Type de document: Article
Mots-clés libres: vertical seawall; wave–structure–sediment interactions; non-breaking waves; sediment scouring; 3D numerical simulations; unstructured finite volume method
Centre: Centre Eau Terre Environnement
Date de dépôt: 09 févr. 2022 15:26
Dernière modification: 09 févr. 2022 15:26
URI: https://espace.inrs.ca/id/eprint/12224

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