Abstract
A-posteriori error estimates containing realistic bounds provide a basis for adaptive numerical methods solving differential equations. In this paper, for a singularly perturbed convection-diffusion model problem, a finite element method is analysed which is based on a technique of approximate symmetrization of the given unsymmetric problem. Realistic a-posteriori error estimates with respect to an appropriate energy-norm are presented. A series of numerical examples demonstrate that our adaptive methods detect and resolve the boundary layer.
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Reinhardt, H.-J.: A-posteriori error analysis and adaptive finite element methods for singularly perturbed convection-diffusion equations. Submitted to Math. Methods Appl. Sci.
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Reinhardt, HJ. (1982). Analysis of adaptive finite element methods for −εU″+U′=F based on a-posteriori error estimates. In: Eckhaus, W., de Jager, E.M. (eds) Theory and Applications of Singular Perturbations. Lecture Notes in Mathematics, vol 942. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0094749
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DOI: https://doi.org/10.1007/BFb0094749
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