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| Titel |
Appearance of peaks and holes in the spectrum of three-dimensional fully-nonlinear potential wave fields |
| VerfasserIn |
Elena Sanina, 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 |
250107947
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| Publikation (Nr.) |
 EGU/EGU2015-7668.pdf |
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| Zusammenfassung |
| We investigate the emergence of coherent groups in three-dimensional fully-nonlinear
potential deep water waves whose initial spectrum is assumed to be of the JONSWAP type
with directional distribution given by cosnθ, where n is the integer. The analysis is based on
the results of long-term wave simulations performed using a numerical solution of a
three-dimensional Laplace equation for the velocity potential subject to nonlinear kinematic
and dynamic boundary conditions at the free surface. We describe the appearance of
sharp peaks and deep holes in the spectrum. The possible explanations such as an
insufficient resolution or existing physical mechanism are discussed. The spectrum peak
locations are investigated and it is shown that they migrate, which contradicts the
hypothesis of insufficient resolution as the reason for this behavior of the spectrum. |
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