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- W4378190565 abstract "We develop efficient and high-order accurate finite difference methods for elliptic partial differential equations in complex geometry in the Difference Potentials framework. The main novelty of the developed schemes is the use of local basis functions defined at near-boundary grid points. The use of local basis functions allow unified numerical treatment of (i) explicitly and implicitly defined geometry; (ii) geometry of more complicated shapes, such as those with corners, multi-connected domain, etc; and (iii) different types of boundary conditions. This geometrically flexible approach is complementary to the classical difference potentials method using global basis functions, especially in the case where a large number of global basis functions are needed to resolve the boundary, or where the optimal global basis functions are difficult to obtain. Fast Poisson solvers based on FFT are employed for standard centered finite difference stencils regardless of the designed order of accuracy. Proofs of convergence of difference potentials in maximum norm are outlined both theoretically and numerically." @default.
- W4378190565 created "2023-05-26" @default.
- W4378190565 creator A5072547861 @default.
- W4378190565 date "2023-09-01" @default.
- W4378190565 modified "2023-09-30" @default.
- W4378190565 title "Local-basis difference potentials method for elliptic PDEs in complex geometry" @default.
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- W4378190565 doi "https://doi.org/10.1016/j.jcp.2023.112246" @default.
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