Grupo de Ambiente Marinho > 1.1 Modelos espectrais e modelos de séries temporais da Agitação Marítima > Publicações

Slunyaev, A., Pelinovsky, E. e Guedes Soares, C. (2005), “Modeling Freak Waves from the North Sea”, Applied Ocean Research, Vol. 27, pp. 12-22

Four freak events registered in the North Sea during a storm are studied and presented. The spatial evolution of the freak waves backward and forward the wave propagation is simulated within the framework of the Dysthe equations [Onorato et al 2002] (The reference to Dysthe eqns is a paper in which he is not an author? Is this not strange?. The lifetimes and travel distances of the freak waves are determined basing on the results of the simulations. The wave evolution predicted by the Dysthe model is compared with simulations of the nonlinear Schrödinger and kinematical equations. The contributions of effects of the modulational (Benjamin Feir instability) and quasi-linear wave grouping are discovered with the help of the nonlinear Schrödinger approximation and the linear theory. It is found that although the modulational instability is important for the description of freak wave evolution, the significant wave enhancement by itself may be achieved even in the linear approximation.

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http://www.sciencedirect.com/science/article/pii/S0141118705000362



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