منابع مشابه
Nonlinear four-wave interaction and freak waves
Four-wave interactions play an important role in the evolution of the spectrum of surface gravity waves. This follows from direct simulations of an ensemble of ocean waves using the Zakharov equation. The theory of homogeneous four-wave interactions, extended to include effects of nonresonant transfer, compares favourably with the ensemble averaged results of the Monte Carlo simulations. In par...
متن کاملDirectional Effects on Freak Wave Prediction
The last decade freak waves have become an important topic in engineering and science. The freak waves are sometimes featured by a single and steep crest causing severe damage to structures and ships. The freak wave studies started in the late 80’s and the high-order nonlinear effects on the freak waves were discussed in the early 90’s (i.e.Yasuda et al., 1992). Owing to the many research effor...
متن کاملModeling of freak wave generation in a 3D-NWT
Freak waves are extreme ocean waves that are not predicted by traditional wave probability distributions. We study wave energy focusing, as a possible mechanism for freak wave formation, in a three-dimensional (3D) Numerical Wave Tank (NWT) solving fully nonlinear potential ow equations. The NWT combines a higher-order 3D-BEM and a Mixed-Eulerian-Lagrangian time updating of the free surface, ba...
متن کاملOpen System Tribology and Influence of Weather Condition
The tribology of an open system at temperatures ranging between 3 °C and -35 °C, with and without snow, was investigated using a pin-on-disc tribometer mounted in a temperature-controlled environmental chamber. The relationship between the microstructure and ductility of the materials and the tribology at the contacting surfaces was investigated. The study shows that during continuous sliding, ...
متن کاملOn the Nonlinear Mapping of a Surface Gravity Wave Spectrum into a Sar Image Spectrum and Freak Wave Detection
It is shown that the nonlinear mapping relation between a surface gravity wave spectrum and its SAR image spectrum, as derived by Hasselmann and Hasselmann [1], is not complete. The reason for this is that the velocity bunching effect is so nonlinear that effects of skewness and kurtosis are as important as the nonlinear terms already retained in the Hasselmann and Hasselmann approach. An analy...
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ژورنال
عنوان ژورنال: Coastal Engineering Proceedings
سال: 2011
ISSN: 2156-1028,0589-087X
DOI: 10.9753/icce.v32.waves.70