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- W2576994263 abstract "In this paper, we consider triangular nonconforming finite element approximations of an interface elliptic problem. We propose two extensions of the conforming Nitsche’s extended finite element method to the nonconforming case. The first one is obtained by adding stabilisation terms on the cut edges, and the second one by modifying the Crouzeix–Raviart basis functions on the cut cells. Both discrete problems are uniformly stable and yield optimal a priori error estimates, uniformly with respect to the diffusion parameters. Moreover, we show that they exhibit the same robustness with respect to the position of the interface as the classical conforming method. We then validate these results numerically. Finally, we propose a nonconforming approximation of the interface Stokes problem based on the modified Crouzeix–Raviart elements and we illustrate it numerically." @default.
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- W2576994263 date "2017-07-01" @default.
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- W2576994263 title "Extension of NXFEM to nonconforming finite elements" @default.
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- W2576994263 doi "https://doi.org/10.1016/j.matcom.2016.12.009" @default.
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