Application of high-order Higdon non-reflecting boundary conditions to linear shallow water models

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Author
Neta, Beny
Joolen, Vince van
Dea, John R.
Givoli, Dan
Date
2007Metadata
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A shallow water model with linear time-dependent dispersive waves in an unbounded domain is considered. The domain is truncated with artificial boundaries B where a sequence of high-order non-reflecting boundary conditions (NRBCs) proposed by Higdon are applied. Methods devised by Givoli and Neta that afford easy implementation of Higdon NRBCs are refined in order to reduce computational expenses. The new refinement makes the computational effort associated with the boundary treatment quadratic rather than exponential (as in the original scheme) with the order. This allows for implementation of NRBCs of higher orders than previously. A numerical example for a semi-infinite channel truncated on one side is presented. Finite difference schemes are used throughout. A shallow water model with linear time-dependent dispersive waves in an unbounded domain is considered.
The domain is truncated with artificial boundaries B where a sequence of high-order non-reflecting
boundary conditions (NRBCs) proposed by Higdon are applied. Methods devised by Givoli and Neta that
afford easy implementation of Higdon NRBCs are refined in order to reduce computational expenses. The
new refinement makes the computational effort associated with the boundary treatment quadratic rather
than exponential (as in the original scheme) with the order. This allows for implementation of NRBCs of
higher orders than previously. A numerical example for a semi-infinite channel truncated on one side is
presented. Finite difference schemes are used throughout.
Description
Communications in Numerical Methods in Engineering, 24, (2008), 1459–1466.
The article of record as published may be located at http://dx.doi.org/10.1002/cnm.1044.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
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