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A hybrid a posteriori error estimator for conforming finite element approximations

机译:混合有限元逼近的后验误差估计器

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This paper introduces a hybrid a posteriori error estimator for the conforming finite element method, which may be regarded as a combination of the explicit residual and the improved ZZ error estimators. With comparable cost, the hybrid estimator is more accurate than the residual estimator. It is shown that the hybrid estimator is reliable on all meshes, unlike estimators of the ZZ type. Moreover, the reliability constant is independent of the jump of the diffusion coefficients for elliptic interface problems under the monotonicity assumption of the coefficients. Finally, numerical examples confirm the robustness of the estimator with respect to coefficient jumps and also better effectivity index compared to the residual estimator. (C) 2018 Elsevier B.V. All rights reserved.
机译:本文介绍了一种用于有限元方法的混合后验误差估计器,可以将其视为显式残差和改进的ZZ误差估计器的组合。以可比的成本,混合估计器比残差估计器更准确。结果表明,与ZZ类型的估计器不同,混合估计器在所有网格上都是可靠的。此外,在常数单调假设下,可靠性常数与椭圆界面问题的扩散系数的跳跃无关。最后,数值示例证实了估计器相对于系数跳跃的鲁棒性,并且与残差估计器相比还具有更好的有效性指数。 (C)2018 Elsevier B.V.保留所有权利。

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