Messanae Universitas Studiorum

Non linear highest sea wave groups in an undisturbed field and in front of a vertical wall

Arena, Felice (2005) Non linear highest sea wave groups in an undisturbed field and in front of a vertical wall. Atti della Accademia Peloritana dei Pericolanti (LXXXI-LXXXII). ISSN 1825-1242

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Abstract

In this paper some non-linear effects for the mechanics of sea wave groups with large waves are investigated, either for waves in an undisturbed field or for waves in front of a vertical wall. To the first-order in a Stokes expansion, Boccotti s quasi-determinism theory enables us to foresee the mechanics of wave groups, either in undisturbed or in diffracted fields, when a large wave occurs. The first formulation of this theory shows the random group mechanics when a large crest height occurs (New wave); the second theory formulation gives the random group mechanics when a large crest-to-trough wave height occurs. The quasi-determinism theory in both formulations, for undisturbed fields, was extended recently to the second-order by the author. In this paper the procedure to derive the second-order solution is analyzed and is applied to random wave groups in front of a vertical wall. The non-linear effects are then investigated in space-time domain, and it is obtained a good agreement of analytical predictions with both field data and data from numerical simulation.

Item Type: Article
Subjects: M.U.S. - Miscellanea > Atti Accademia Peloritana > Classe di Scienze Fisiche, Matematiche e Naturali
Depositing User: Mr Nunzio Femminò
Date Deposited: 10 Jun 2005
Last Modified: 19 Sep 2012 08:28
URI: http://cab.unime.it/mus/id/eprint/266

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