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Nonlinear Processes in Geophysics An interactive open-access journal of the European Geosciences Union
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Volume 24, issue 2
Nonlin. Processes Geophys., 24, 157-165, 2017
https://doi.org/10.5194/npg-24-157-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: Waves in media with pre-existing or emerging inhomogeneities...

Nonlin. Processes Geophys., 24, 157-165, 2017
https://doi.org/10.5194/npg-24-157-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 28 Mar 2017

Research article | 28 Mar 2017

Subharmonic resonant excitation of edge waves by breaking surface waves

Nizar Abcha1, Tonglei Zhang1, Alexander Ezersky1, Efim Pelinovsky2,3,4, and Ira Didenkulova2,5 Nizar Abcha et al.
  • 1Morphodynamique Continentale et Côtière UMR6143, CNRS, Normandie Univ, UNICAEN, 14000 Caen, France
  • 2Nizhny Novgorod State Technical University n.a. R.E. Alekseev, 24 Minin Str., Nizhny Novgorod 603950, Russia
  • 3Institute of Applied Physics, 46 Uljanov Str., Nizhny Novgorod 603950, Russia
  • 4National Research University, Higher School of Economics, Nizhny Novgorod 603950, Russia
  • 5Marine Systems Institute at Tallinn University of Technology, Akadeemia tee 15A, 12618 Tallinn, Estonia

Abstract. Parametric excitation of edge waves with a frequency 2 times less than the frequency of surface waves propagating perpendicular to the inclined bottom is investigated in laboratory experiments. The domain of instability on the plane of surface wave parameters (amplitude–frequency) is found. The subcritical instability is observed in the system of parametrically excited edge waves. It is shown that breaking of surface waves initiates turbulent effects and can suppress the parametric generation of edge waves.

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Parametric excitation of edge waves with a frequency 2 times less than the frequency of surface waves propagating perpendicular to the inclined bottom are investigated in laboratory experiments. The domain of instability on the plane of surface wave parameters (amplitude–frequency) is found. The subcritical instability is observed in the system of parametrically excited edge waves. It is shown that breaking of surface waves initiates turbulent effects and can suppress the parametric generation.
Parametric excitation of edge waves with a frequency 2 times less than the frequency of surface...
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