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- W4226206135 abstract "This study proposes a novel coupled-mode theory for two-dimensional exterior Helmholtz problems. The proposed approach is based on the separation of the entire space R2 into a fictitious disk and its exterior. The disk is allocated in such a way that it comprises all the inhomogeneity; therefore, the exterior supports cylindrical waves with a continuous spectrum. For the interior, we expand an unknown wave field using normal modes that satisfy some auxiliary boundary conditions on the surface of the disk. For the interior expansion, we propose combining the Neumann and Dirichlet normal modes. We show that the proposed expansion sacrifices L2 orthogonality but significantly improve the convergence. Finally, we present some numerical verifications of the proposed coupled-mode theory." @default.
- W4226206135 created "2022-05-05" @default.
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- W4226206135 date "2022-01-24" @default.
- W4226206135 modified "2023-09-27" @default.
- W4226206135 title "A coupled-mode theory for two-dimensional exterior Helmholtz problems based on the Neumann and Dirichlet normal mode expansion" @default.
- W4226206135 doi "https://doi.org/10.48550/arxiv.2201.09502" @default.
- W4226206135 hasPublicationYear "2022" @default.
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