Numerical Studies of Acoustic Propagation in Shallow Water

Abstract

Equations were derived which rigorously codify the propagation of fields in finite-difference time-domain (FDTD) grids. These equations were then used to construct a perfect total-field/scattered field boundary (which is used to inject energy into the grid). Algorithms were developed to enhance the modeling of material boundaries in the FDTD method; the accuracy of various FDTD or FDTD-like algorithms were rigorously studied; an FDTD algorithm was developed which is theoretically exact (i.e., provided the grid is infinite the accuracy is limited only by the finite precision of computers); various computer programs related to the FDTD method were written; and information and programs were disseminated via journal publications, conference presentations, and the Web.

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Document Details

Document Type
Technical Report
Publication Date
Nov 13, 2005
Accession Number
ADA440431

Entities

People

  • John B. Schneider

Organizations

  • Washington State University

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorbers (Materials)
  • Abstracts
  • Acoustic Propagation
  • Acoustics
  • Advanced Materials
  • Algorithms
  • Boundaries
  • Boundary Layer
  • Classification
  • Computer Science
  • Equations
  • Instructions
  • Materials
  • Metamaterials
  • Physics
  • Resonant Frequency
  • Shallow Water

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Structural Dynamics.
  • Technical Research and Report Writing.