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Accession Number ADA572280
Title TSA - A Two Scale Approximation for Wind-Generated Ocean Surface Waves.
Publication Date Sep 2012
Media Count 9p
Personal Author C. E. Long D. T. Resio W. Perrie
Abstract Long-Term Goals include: (a) 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. (b) Fully test TSA with respect to exact codes for the full Boltzmann integral (FBI), for duration-limited, fetch-limited wave growth, turning winds, swell-wind-sea, interactions, etc. (c) Numerically investigate and clarify the basis for TSA, its limitations, errors, enhancements, improvements, self- similarity properties, and spectral flux properties. (d) Implement TSA in a variety of modern operational wave forecast models, e.g. WAVEWATCH(TM) (WW3) and SWAN for extensive tests on important, realistic wave conditions. (e) Derive, adapt and implement new formulations for source terms, wind input S(sub in), and dissipation S(sub ds), 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.
Keywords Approximation(Mathematics)
Boltzmann equation
Fbi(Full boltzmann integral)
Hurricane juan
Numerical downshifting
Ocean waves
Surface waves
Tsa(Two-scale approximation)
Wave forecast models
Wave spectra

Source Agency Non Paid ADAS
NTIS Subject Category 47C - Physical & Chemical Oceanography
72B - Algebra, Analysis, Geometry, & Mathematical Logic
Corporate Author Army Engineer Waterways Experiment Station, Kitty Hawk, NC. Field Research Facility.
Document Type Technical report
Title Note Annual rept.
NTIS Issue Number 1317
Contract Number N00014-10-1-0922

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