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arXiv 2203.05929math.NAcs.NA
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Stokes问题Taylor-Hood元的辅助子空间后验估计

A Posteriori Estimates of Taylor-Hood Element for Stokes Problem Using Auxiliary Subspace Techniques

Jiachuan Zhang, Ran Zhang, Xiaoshen Wang

摘要:

基于辅助子空间技术,对二维和三维Stokes问题提出了一种分层基后验误差估计器。对于误差估计器,我们只需要求解分别对应于速度和压力自由度的两个全局对角线性系,大大减少了计算量。误差估计器的振荡项的上界和下界也被示出,以解决没有饱和假设的自适应方法的可靠性。通过数值模拟验证了算法的有效性和鲁棒性。

英文摘要:

Based on the auxiliary subspace techniques, a hierarchical basis a posteriori error estimator is proposed for the Stokes problem in two and three dimensions. For the error estimator, we need to solve only two global diagonal linear systems corresponding to the degree of freedom of velocity and pressure respectively, which reduces the computational cost sharply. The upper and lower bounds up to an oscillation term of the error estimator are also shown to address the reliability of the adaptive method without saturation assumption. Numerical simulations are performed to demonstrate the effectiveness and robustness of our algorithm.

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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