Adaptive Local Postprocessing Finite Element Method for the Navier-Stokes Equations

Adaptive Local Postprocessing Finite Element Method for the Navier-Stokes Equations
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纳维-斯托克斯方程的自适应局部后处理有限元法

DOI:
10.1007/s10915-012-9631-6
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发表时间:
2013-05
影响因子:
2.5
通讯作者:
Zheng, Haibiao
Zheng, Haibiao
中科院分区:
数学2区
文献类型:
--
作者:
Song, Lina;Hou, Yanren;Zheng, Haibiao

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本文提出了一种求解N-S方程的自适应局部后处理有限元方法。我们首先在一个相对较粗的网格上解决这个问题,以得到一个粗略的近似。然后,我们通过求解定义在局部精细网格上的一系列近似局部残差方程来修正粗糙近似,这些近似局部残差方程可以并行实现。此外,我们还提出了可靠的局部后验误差估计器,并基于相应的后验误差估计构造了一种自适应算法。最后,给出了一些数值算例来验证该算法。
An adaptive local postprocessing finite element method for the Navier-Stokes equations is presented in this paper. We firstly solve the problem on a relative coarse grid to get a rough approximation. Then, we correct the rough approximation by solving a series of approximate local residual equations defined on some local fine grids, which can be implemented in parallel. In addition, we also propose a reliable local a posteriori error estimator and construct an adaptive algorithm based on the corresponding a posterior error estimate. Finally, some numerical examples are presented to verify the algorithm.
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