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| Titel |
Behavior of coherent groups in three-dimensional fully-nonlinear potential wave fields |
| VerfasserIn |
Elena Sanina, Sergey Suslov, Dmitry Chalikov, Alexander Babanin |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250108309
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| Publikation (Nr.) |
 EGU/EGU2015-8060.pdf |
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| Zusammenfassung |
| We investigate the appearance of coherent groups in three-dimensional fully-nonlinear
potential deep water waves computed in the course of long-term numerical simulations based
on the three-dimensional Laplace equation for the velocity potential subject to nonlinear
kinematic and dynamic boundary conditions at the free surface. The initial wave
spectrum is assumed to be of the JONSWAP type with directional distribution given by
cosnθ, where n is the integer varying from 1 to 16. The statistics of wave groups
propagating in the directions forming angle θ, 45°≈¤ θ ≈¤ 45° with the main wave
propagation direction are presented. The average value of the velocity vg of the
detected groups is found to be independent of the direction of their propagation.
The average value of the maximum wave height in the groups normalized with the
significant wave height for the wave field is found to decrease with the increase of
n. The results show that the extreme waves are more likely to propagate in the
main wave direction and to be observed in the fields with wider initial spectra. |
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