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Wave turbulence and intermittency in directional wave fields
Fadaeiazar, E.; Alberello, A.; Onorato, M.; Leontini, J.; Frascoli, F.; Waseda, T.; Toffoli, A. (2018). Wave turbulence and intermittency in directional wave fields. Wave Motion 83: 94-101. https://dx.doi.org/10.1016/j.wavemoti.2018.09.002
In: Wave motion. North-Holland: Amsterdam. ISSN 0165-2125; e-ISSN 1878-433X, more
Peer reviewed article  

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Keyword
    Marine/Coastal
Author keywords
    Wave motion; Wave turbulence; Intermittency; Structure functions; Ocean waves

Authors  Top 
  • Fadaeiazar, E.
  • Alberello, A.
  • Onorato, M.
  • Leontini, J.
  • Frascoli, F.
  • Waseda, T.
  • Toffoli, A., more

Abstract
    The evolution of surface gravity waves is driven by nonlinear interactions that trigger an energy cascade similarly to the one observed in hydrodynamic turbulence. This process, known as wave turbulence, has been found to display anomalous scaling with deviation from classical turbulent predictions due to the emergence of coherent and intermittent structures on the water surface. In the ocean, waves are spread over a wide range of directions, with a consequent attenuation of the nonlinear properties. A laboratory experiment in a large wave facility is presented to discuss the sensitivity of wave turbulence on the directional properties of model wave spectra. Results show that the occurrence of coherent and intermittent structures become less likely with the broadening of the wave directional spreading. There is no evidence, however, that intermittency completely vanishes.

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