DEVELOPMENT OF A THIRD GENERATION SHALLOW-WATER WAVE MODEL WITH UNSTRUCTURED SPATIAL MESHING

Michel Benoit, Frederic Marcos, Francoise Becq

Abstract


A numerical third-generation wave model dedicated both to deep water and nearshore applications is presented and applied to several test-cases to highlight its capabilities. Among its main features, this model uses a finite-elements technique for the discretization of the modelled area, which makes it suitable to represent complex bottom topographies and irregular shorelines. Furthermore, the piece-wise ray method used for wave propagation allows to use rather large time-steps, which in turn allows to keep the computational time at a very moderate level. The implementation of shallow-water physics in the model is also described, in particular with respect to depth-induced breaking. Several applications of the model are presented and compared to field or laboratory data for their validation. Finally, the main research and development items are mentioned and discussed.

Keywords


wave model; shallow water; spatial meshing; mesh; model development

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