A physically based strategy was used to model swash zone hydrodynamics forced bybreaking waves within a Boussinesq type of model. The position and the velocity of the shoreline weredetermined continuously in space by solving the physically based equations of the shoreline motion;moreover, a fixed grid method, with a wet-dry interface, was adopted for integrating the Boussinesqmodel. The numerical stability of the model was improved by means of an extrapolation method. Tovalidate the proposed methodology, the classical analytical solution for the shoreline motion of amonochromatic wave train over a plane beach was considered. The comparison between the analyticaland numerical horizontal shoreline movements provided a very good agreement. Several other tests onthe run-up of non-breaking and breaking waves were performed as well. These tests showed that theproposed model was always in fairly good agreement with the experimental data, even in complexhydrodynamic situations like those forced by breaking solitary waves. In particular, in comparisonwith other state-of-the art shoreline models, in all the analyzed cases the proposed model allowedmuch better predictions of the shoreline velocity to be obtained.
|Numero di pagine||12|
|Stato di pubblicazione||Published - 2011|
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