Anisotropic residual based a posteriori mesh adaptation in 2D: Element based approach

JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS

卷:349

Article

Boey, Edward¹  Bourgault, Yves¹  Giordano, Thierry¹ 

[1] Univ Ottawa, Dept Math & Stat, 585 King Edward Ave, Ottawa, ON K1N 6N5, Canada

关键词: A posteriori error estimation;    Finite element method;    Anisotropic mesh adaptation;   

DOI  :  10.1016/j.cam.2018.08.053

来源: Elsevier

【 摘 要 】

An element-based adaptation method is developed for an anisotropic a posteriori error estimator. The adaptation does not make use of a metric, but instead equidistributes the error over elements using local mesh modifications. Numerical results are reported, comparing with three popular anisotropic adaptation methods currently in use. It was found that the new method gives favourable results for controlling the energy norm of the error in terms of degrees of freedom at the cost of increased CPU usage. Additionally, we considered a new L-2 variant of the estimator. The estimator is shown to be conditionally equivalent to the exact L-2 error. We provide examples of adapted meshes with the L-2 estimator, and show that it gives greater control of the L-2 error compared with the original estimator. (C) 2018 Elsevier B.V. All rights reserved.

【 授权许可】

Free