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- W2901846738 abstract "We explain how to use smooth bivariate splines of arbitrary degree to solve the exterior Helmholtz equation based on a Perfectly Matched Layer (PML) technique. In a previous study (cf. [26]), it was shown that bivariate spline functions of high degree can approximate the solution of the bounded domain Helmholtz equation with an impedance boundary condition for large wave numbers $ksim 1000$. In this paper, we extend this study to the case of the Helmholtz equation in an unbounded domain. The PML is constructed using a complex stretching of the coordinates in a rectangular domain, resulting in a weighted Helmholtz equation with Dirichlet boundary conditions. The PML weights are also approximated by using spline functions. The computational algorithm developed in [26] is used to approximate the solution of the resulting weighted Helmholtz equation. Numerical results show that the PML formulation for the unbounded domain Helmholtz equation using bivariate splines is very effective over a range of examples." @default.
- W2901846738 created "2018-11-29" @default.
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- W2901846738 date "2018-11-19" @default.
- W2901846738 modified "2023-09-27" @default.
- W2901846738 title "A Bivariate Spline Solution to the Exterior Helmholtz Equation and Its Applications" @default.
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