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- W2617084311 abstract "The general theory of Babuv{s}ka ensures necessary and sufficient conditions for a mixed problem in classical or Petrov-Galerkin form to be well posed in the sense of Hadamard. Moreover, the mixed method of Raviart-Thomas with low-level elements can be interpreted as a finite volume method with a non-local gradient. In this contribution, we propose a variant of type Petrov-Galerkin to ensure a local computation of the gradient at the interfaces of the elements. The in-depth study of stability leads to a specific choice of the test functions. With this choice, we show on the one hand that the mixed Petrov-Galerkin obtained is identical to the finite volumes scheme volumes finis `a 4 points (VF4) of Faille, Gallouet and Herbin and to the condensation of mass approach developed by Baranger, Maitre and Oudin. On the other hand, we show the stability via an inf-sup condition and finally the convergence with the usual methods of mixed finite elements." @default.
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- W2617084311 date "2017-01-01" @default.
- W2617084311 modified "2023-10-14" @default.
- W2617084311 title "Raviart Thomas Petrov–Galerkin Finite Elements" @default.
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- W2617084311 doi "https://doi.org/10.1007/978-3-319-57397-7_27" @default.
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