Study of the Perturbation of the Surface-Wave Height Spectrum due to a Sinusoidal Current Feature of Variable Wavelength and Phase Speed.

Abstract

Closed form expressions for the perturbation of the surface-wave spectrum due to a weak sinusoidal current feature are developed from the general wave-current interaction equations. A parametric study is presented of the dependence of the perturbation on quantities such as the wavelength, phase speed, and propagation direction of the current feature, along with an estimate of the most strongly perturbed spectral component as a function of these parameters. The perturbation due to more complicated features may be obtained from the results presented in this work through Fourier expansion techniques. Keywords: wave current interaction; spectral perturbation; action balance equation; surface wave relaxation rate; Synthetic Aperture Radar.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1986
Accession Number
ADA169736

Entities

People

  • Donald R. Thompson

Organizations

  • Johns Hopkins University

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Electromagnetic Radiation
  • Equations
  • Frequency
  • Group Velocity
  • Internal Waves
  • Mathematics
  • Perturbations
  • Phase Velocity
  • Physics Laboratories
  • Radar
  • Spectra
  • Surface Waves
  • Synthetic Aperture Radar
  • Two Dimensional
  • Wave Propagation
  • Waves
  • Wind Direction

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Calculus or Mathematical Analysis