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arXiv 2107.06341math.NAcs.NA
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定常对流扩散反应方程协调有限元逼近的混合后验误差估计

Hybrid A Posteriori Error Estimators for Conforming Finite Element Approximations to Stationary Convection-Diffusion-Reaction equations

Difeng Cai, Zhiqiang Cai

摘要:

我们考虑对流扩散反应方程在扩散占优和对流/反应占优两种情况下的后验误差估计。我们提出了一个明确的混合估计,这在每一个政权,被证明是可靠的和有效的常数独立的参数的基本问题。对于对流主导的问题,Verf{ü}rth \cite{verf2005confusion}引入的范数用于衡量逼近误差。各种数值实验进行(1)证明的混合估计的鲁棒性;(2)表明,混合估计是更准确的比显式残差估计和反应的大小不太敏感,即使他们都是强大的。

英文摘要:

We consider the a posteriori error estimation for convection-diffusion-reaction equations in both diffusion-dominated and convection/reaction-dominated regimes. We present an explicit hybrid estimator, which, in each regime, is proved to be reliable and efficient with constants independent of the parameters in the underlying problem. For convection-dominated problems, the norm introduced by Verf{ü}rth \cite{verf2005confusion} is used to measure the approximation error. Various numerical experiments are performed to (1) demonstrate the robustness of the hybrid estimator; (2) show that the hybrid estimator is more accurate than the explicit residual estimator and is less sensitive to the size of reaction, even though both of them are robust.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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