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On the asymptotic exactness of an error estimator for the lowest-order Raviart-Thomas mixed finite element

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In this paper we analyze an error estimator for the lowest-order triangular Raviart–Thomas mixed finite element which is based on solution of local problems for the error. This estimator was proposed in [Alonso, Error estimators for a mixed method, Numer. Math. 74 (1996), 385–395] and has a similar concept to that of Bank and Weiser. We show that it is asymptotically exact for the Poisson equation if the underlying triangulations are uniform and the exact solution is regular enough.

Abstract

In this paper we analyze an error estimator for the lowest-order triangular Raviart–Thomas mixed finite element which is based on solution of local problems for the error. This estimator was proposed in [Alonso, Error estimators for a mixed method, Numer. Math. 74 (1996), 385–395] and has a similar concept to that of Bank and Weiser. We show that it is asymptotically exact for the Poisson equation if the underlying triangulations are uniform and the exact solution is regular enough.

참고문헌 (18)

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  10. K.-Y. Kim, "Guaranteed a posteriori error estimator for mixed nite element methods of elliptic problems", Appl. Math. Comp., 218, pp.11820~11831 (2012)
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  13. A. Maxim, "Asymptotic exactness of an a posteriori error estimator based on the equilibrated residual method", Numer. Math., 106, pp.225~253 (2007)
  14. P. A. Raviart, "A mixed finite element method for 2nd order elliptic problems, in Proc. Conf. on Mathematical Aspects of Finite Ele- ment Methods", Lecture Notes in Math., 606, pp.292~315 (1977), Springer-Verlag
  15. M. Vohralik, "A posteriori error estimates for lowest-order mixed finite ele- ment discretizations of convection-diffusion-reaction equations", SIAM J. Numer. Anal., 45, pp.1570~1599 (2007)
  16. B. I. Wohlmuth, "A comparison of a posteriori error estimators for mixed nite element discretizations by Raviart-Thomas elements", Math. Comp., 68, pp.1347~1378 (1999)
  17. J. Xu, "Analysis of recovery type a posteriori error estimators for mildly structured grids", Math. Comp., 73, pp.1139~1152 (2004)
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