Modeling Combined Diffraction-Refraction in a Coastal Spectral Wave Model

Abstract

This paper describes the derivation and implementation of combined wave diffraction-refraction in a spectral directional wave model for coastal applications. The wave refraction is included in the total derivative of wave-action while diffraction is formulated as wave energy diffusion in the wave-action balance equation. The combined diffraction-refraction model equation conserves the total wave-action under no net energy gain or loss. The numerical solution scheme for the model equation is simple and computation is stable. The method is demonstrated in a two-dimensional (2D) steady-state spectral model for a long wedge, an idealized shoal and a coastal harbor physical model.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2012
Accession Number
ADA578430

Entities

People

  • Lihwa Lin
  • Zeki Demirbilek

Organizations

  • United States Army Corps of Engineers

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Computations
  • Coordinate Systems
  • Diffraction
  • Energy
  • Engineering
  • Engineers
  • Frequency
  • Helmholtz Equations
  • Offshore
  • Refraction
  • Spectra
  • Steady State
  • Three Dimensional
  • Two Dimensional
  • Water Waves
  • Wave Power
  • Wave Propagation

Fields of Study

  • Physics

Readers

  • Coastal Oceanography
  • Computational Fluid Dynamics (CFD)
  • Fluid Dynamics.