On non-linear very large sea wave groups

✍ Scribed by Felice Arena

• Book ID: 103869518
• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 321 KB
• Volume: 32
• Category: Article
• ISSN: 0029-8018
• DOI: 10.1016/j.oceaneng.2004.12.002

✦ Synopsis

The paper deals with the non-linear effects for sea wave groups. Boccotti's quasi-determinism theory, which is exact to the first-order in a Stokes expansion, gives the mechanics of sea wave groups when either a very high crest (first formulation of the theory-'New wave'), or a large crest-to-trough wave height (second formulation of the theory) occurs.

In this paper, the quasi-determinism theory, in both formulations, is extended to the second-order, by obtaining the expressions of free surface displacement and velocity potential, as a function of wave spectrum.

Finally it is shown that analytical predictions are in good agreement with both field data and data of Monte Carlo simulations of non-linear random waves.