Abstract
We prove the convergence of an adaptive mixed finite element method (AMFEM) for (nonsymmetric) convection-diffusion-reaction equations. The convergence result holds for the cases where convection or reaction is not present in convection- or reaction-dominated problems. A novel technique of analysis is developed by using the superconvergence of the scalar displacement variable instead of the quasi-orthogonality for the stress and displacement variables, and without marking the oscillation dependent on discrete solutions and data. We show that AMFEM is a contraction of the error of the stress and displacement variables plus some quantity. Numerical experiments confirm the theoretical results.
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Du, S., Xie, X. Convergence of an adaptive mixed finite element method for convection-diffusion-reaction equations. Sci. China Math. 58, 1327–1348 (2015). https://doi.org/10.1007/s11425-015-4992-6
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DOI: https://doi.org/10.1007/s11425-015-4992-6
Keywords
- convection-diffusion-reaction equation
- adaptive mixed finite element method
- superconvergence
- oscillation
- convergence