AV短视频

Nonlinearity and Climate Group

Oceanic rogue waves

Rogue waves are transient giant waves, exceeding twice the significant wave height. As described in [1] they `appear from nowhere and disappear without a trace’. Measuring up to 25 m in open ocean and largely exceeding the predictions of usual Gaussian statistical distributions, they impact the dimensioning of ship structure and are a danger for their safety.

The mechanism at the root of the formation of rogue waves is still unclear. They are attributed to non-linearity and/or to the interference of fluctuating individual waves of smaller amplitude. We work both numerically and experimentally to improve this understanding, especially in the presence of wind [2-3], using deterministic or statistical approaches. Analogies with corresponding optical nonlinear devices are also investigated.  

[1] Akhmediev, Ankiewicz, Taki, Phys. Lett. A 373, 675 (2009)

[2] Brunetti et al., Phys. Lett. A 378, 1025 (2014)

[3] Eeltink et al., Phys. Fluids 29, 107103 (2017)