TSA - A Two Scale Approximation for Wind-Generated Ocean Surface Waves

Abstract

To provide an accurate, efficient, computational model (two-scale approximation, TSA) for the 4-wave interactions, in operational wave forecast models, suitable for global, basin and coastal scale applications, and able to transition seamlessly from deep to shallow water. Fully test TSA with respect to exact codes for the full Boltzmann integral (FBI), for durationlimited, fetch-limited wave growth, turning winds, swell-windsea, interactions, etc. Numerically investigate and clarify the basis for TSA, its limitations, errors, enhancements, improvements, self-similarity properties, and spectral flux properties. Implement TSA in a variety of modern operational wave forecast models, e.g. WAVEWATCHTM (WW3) and SWAN for extensive tests on important, realistic wave conditions. Derive, adapt and implement new formulations for source terms, Sin and Sds, from recent literature and the NOPP partnership, with TSA, in modern wave models, for tests, including veering or accelerating winds, sea and swell interactions, and real storm cases.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2011
Accession Number
ADA555061

Entities

People

  • William Perrie

Organizations

  • Bedford Institute of Oceanography

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Climate Change
  • Electrical Solitons
  • Energy
  • Energy Transfer
  • Frequency
  • Gravity Waves
  • Information Operations
  • Integrals
  • Models
  • Momentum
  • Ocean Waves
  • Oceans
  • Shallow Water
  • Spectra
  • Standards
  • Surface Waves
  • Waves

Readers

  • Coastal Oceanography
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Ocean-Atmosphere Mesoscale Modeling, Data Assimilation, and Flux Boundary Layers