Absorbing boundary conditions for difference approximations to the multidimensional wave equation
Author:
Robert L. Higdon
Journal:
Math. Comp. 47 (1986), 437459
MSC:
Primary 65M10
MathSciNet review:
856696
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Abstract: We consider the problem of constructing absorbing boundary conditions for the multidimensional wave equation. Here we work directly with a difference approximation to the equation, rather than first finding analytical boundary conditions and then discretizing the analytical conditions. This approach yields some simple and effective discrete conditions. These discrete conditions are consistent with analytical conditions that are perfectly absorbing at certain nonzero angles of incidence. This fact leads to a simple and general canonical form for analytical absorbing boundary conditions. The use of this form has theoretical and practical advantages.
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Additional Information
DOI:
http://dx.doi.org/10.1090/S00255718198608566964
PII:
S 00255718(1986)08566964
Keywords:
Absorbing boundary conditions,
wave equation,
initialboundary value problems
Article copyright:
© Copyright 1986 American Mathematical Society
