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- W2091907831 endingPage "454" @default.
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- W2091907831 abstract "Finite element methods are constructed for the reduced wave equation in unbounded domains. Exterior boundary conditions for a computational problem are derived from an exact relation between the solution and its derivatives on an artificial boundary by the DtN method, precluding singular behavior in finite element models. Galerkin and Galerkin/least-squares finite element methods are presented. Model problems of radiation with inhomogeneous Neumann boundary conditions in plane and spherical configurations are employed to design and evaluate the numerical methods in the entire range of propagation and decay. The Galerkin/least-squares method with DtN boundary conditions is designed to exhibit superior behavior for problems of acoustics, providing accurate solutions with relatively low mesh resolution and allowing numerical damping of unresolved waves. General convergence results guarantee the good performance of Galerkin/least-squares methods on all configurations of practical interest. Numerical tests validate these conclusions." @default.
- W2091907831 created "2016-06-24" @default.
- W2091907831 creator A5024391442 @default.
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- W2091907831 date "1992-08-01" @default.
- W2091907831 modified "2023-10-13" @default.
- W2091907831 title "Galerkin/least-squares finite element methods for the reduced wave equation with non-reflecting boundary conditions in unbounded domains" @default.
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- W2091907831 doi "https://doi.org/10.1016/0045-7825(92)90006-6" @default.
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