Structure of Frequency Domain Models for Random Wave Breaking

Abstract

We consider the form of a breaking wave dissipation term for use in spectral or stochastic wave evolution models. A time domain Boussinesq model is tested for accuracy in modeling evolution of second and third moment statistics in shoaling and breaking waves. The structure of the dissipation term in the time domain is then used to infer the corresponding structure of the term in the frequency domain. In general, we find that the dissipation coefficient is distributed like 1/Sn(f), where Sn(f)is the spectral density of the surface displacement n. This implies an f2 dependence for the coefficient in the inner surfzone, as opposed to a constant distribution over frequency as suggested by Eldeberky and Battjes (1996).

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1996
Accession Number
ADA331899

Entities

People

  • James Kaihatu
  • James T Kirby

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Civil Engineering
  • Coastal Engineering
  • Coefficients
  • Data Sets
  • Displacement
  • Dissipation
  • Energy Transfer
  • Engineering
  • Frequency
  • Frequency Domain
  • Military Research
  • Personal Information Managers
  • Power Spectra
  • Shallow Water
  • Statistics
  • Time Domain
  • Waves

Fields of Study

  • Mathematics

Readers

  • Coastal Oceanography
  • Mathematical Modeling and Probability Theory.
  • Mathematics or Statistics

Technology Areas

  • AI & ML
  • AI & ML - Bayesian Inference
  • AI & ML - Machine Learning Algorithms