Superconvergent postprocessing of $C^0$ interior penalty method
Numerical Analysis
2024-01-24 v1 Numerical Analysis
Abstract
This paper focuses on the superconvergence analysis of the Hessian recovery technique for the Interior Penalty Method (C0IP) in solving the biharmonic equation. We establish interior error estimates for C0IP method that serve as the superconvergent analysis tool. Using the argument of superconvergence by difference quotient, we prove superconvergent results of the recovered Hessian matrix on translation-invariant meshes. The Hessian recovery technique enables us to construct an asymptotically exact error estimator for the C0IP method. Numerical experiments are provided to support our theoretical results.
Cite
@article{arxiv.2401.12589,
title = {Superconvergent postprocessing of $C^0$ interior penalty method},
author = {Ying Cai and Hailong Guo and Zhimin Zhang},
journal= {arXiv preprint arXiv:2401.12589},
year = {2024}
}