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dc.contributor.authorDeng, Quanling
dc.contributor.authorPuzyrev, Vladimir
dc.contributor.authorCalo, Victor
dc.identifier.citationDeng, Q. and Puzyrev, V. and Calo, V. 2018. Isogeometric spectral approximation for elliptic differential operators. Journal of Computational Science.

© 2018 Elsevier B.V. We study the spectral approximation of a second-order elliptic differential eigenvalue problem that arises from structural vibration problems using isogeometric analysis. In this paper, we generalize recent work in this direction. We present optimally-blended quadrature rules for the isogeometric spectral approximation of a diffusion-reaction operator with both Dirichlet and Neumann boundary conditions. The blended rules improve the accuracy of the isogeometric approximation. In particular, the optimal blending rules minimize the dispersion error and lead to two extra orders of super-convergence in the eigenvalue error. Various numerical examples (including the Schrödinger operator for quantum mechanics) in one and three spatial dimensions demonstrate the performance of the blended rules.

dc.publisherElsevier Ltd
dc.titleIsogeometric spectral approximation for elliptic differential operators
dc.typeJournal Article
dcterms.source.titleJournal of Computational Science
curtin.departmentSchool of Earth and Planetary Sciences (EPS)
curtin.accessStatusFulltext not available

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