High Frequency Acoustic Propagation using Level Set Methods

Abstract

This paper describes a new approach to numerical solution of the high frequency approximation to the wave equation. Traditional solutions to the Eikonal equation in high frequency acoustics are obtained via ray tracing. In ray tracing, the numerical grid on which solutions are computed becomes distorted over time as rays diverge from the initial wavefront, reducing the accuracy of the solution. The level set method is a fixed grid method, whereby the user controls the underlying grid, and hence the accuracy, of the solution.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2007
Accession Number
ADA517254

Entities

People

  • Andrew J. Fredricks
  • Sheri L. Doran

Organizations

  • Naval Undersea Warfare Center

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustics
  • Boltzmann Equation
  • Boundaries
  • Differential Equations
  • Equations
  • Frequency
  • Geometry
  • Partial Differential Equations
  • Ray Tracing
  • Standards
  • Stratified Fluids
  • Three Dimensional
  • Two Dimensional
  • Undersea Warfare
  • Underwater Acoustics
  • Wave Equations

Fields of Study

  • Physics

Readers

  • Computational Modeling and Simulation
  • Geodesy
  • Wave Propagation and Nonlinear Chaotic Dynamics.