Impedance-matched absorbers for finite-difference parabolic equation algorithms

PDF

Authors
  1. Yevick, D.
  2. Thomson, D.J.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
In this paper, a perfectly matched layer (PML) absorber, recently introduced into the electromagnetic propagation literature by Berenger, is adapted for use with both paraxial and wide-angle acoustic parabolic equations (PEs). Our procedure incorparates an imaginary component into the transverse coordinate that mimics the introduction of a fictitious absorber on the edge of the computational grid. Use of such an impedance-matched layer can significantly reduce spurious reflections compared to physical absorbing layer methods and thus allows a smaller number of boundary points to be employed in PE calculations. Numerical results obtained with several higher-order propagator approximations confirm that such impedance-matched absorbers efficiently eliminate reflections.
Keywords
Frequency domain analysis;Finite difference
Date of publication
01 Dec 1999
Number of Pages
13
DSTKIM No
CA010168
CANDIS No
514630
Format(s):
Hardcopy;Document Image stored on Optical Disk

Permanent link

Document 1 of 1

Date modified: