Abstract
This work presents an a posteriori error estimation technique for Q 1 finite elements on quadrilateral triangulations by residual evaluations with respect to biquadratic test functions. The localization is performed in terms of nodal error indicators instead of cell contributions. The reliability and efficiency of the estimator is shown. Further, we discuss a simplified estimator which is even more attractive from the computational point of view.
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Acknowledgements
We gratefully acknowledge the partial support of this work by the DFG Priority Program SPP 1276 (MetStröm).
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Braack, M., Taschenberger, N. (2013). A Posteriori Error Estimation by a Q 1 ∕ Q 2 Hierarchical Basis. In: Cangiani, A., Davidchack, R., Georgoulis, E., Gorban, A., Levesley, J., Tretyakov, M. (eds) Numerical Mathematics and Advanced Applications 2011. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-33134-3_3
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DOI: https://doi.org/10.1007/978-3-642-33134-3_3
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