Wave Energy Dissipation of Spilling and Plunging Breaking Waves in Spectral Models

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Saprykina Y., Aydogan B., Ayat B.

Journal of Marine Science and Engineering, vol.10, no.2, 2022 (Journal Indexed in SCI Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 10 Issue: 2
  • Publication Date: 2022
  • Doi Number: 10.3390/jmse10020200
  • Title of Journal : Journal of Marine Science and Engineering
  • Keywords: Boussinesq model, Plunging, Spectral modeling, Spilling, SWAN model, Wave breaking, Wave energy dissipation, Wave spectra


© 2022 by the authors. Licensee MDPI, Basel, Switzerland.On the basis of field experiments and modeling, the dependence of the dissipation of the energy of waves breaking by plunging and spilling on the frequency of wave spectra was investi-gated. It was shown that the modeling of wave breaking should take into account the compensa-tion of the nonlinear growth of higher wave harmonics, which occurs in different ways for waves breaking with different types and for different methods of modeling a nonlinear source term. The study revealed that spilling breaking waves have a frequency selectivity of energy dissipation at frequencies of second and third harmonics for the Boussinesq and SWAN models for any method of modeling a nonlinear source term. Plunging breaking waves have a quadratic dependence of the dissipation coefficient on frequency in the Boussinesq model and SWAN model with the SPB approximation for a nonlinear source term. The SWAN model with default LTA approximation for plunging breaking waves also assumes frequency-selective energy dissipation. The discrepancy between the LTA default method and others can be explained by the overestimation of the contri-bution of the second nonlinear harmonic and by inaccurate approximation for the biphase. It is possible to improve the accuracy of LTA and SPB methods by tuning SWAN model coefficients.