A posteriori error estimates for the virtual element method.

A posteriori error estimates for the virtual element method.
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DOI:
10.1007/s00211-017-0891-9
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发表时间:
2017
影响因子:
2.1
通讯作者:
Sutton OJ
Sutton OJ
中科院分区:
数学2区
文献类型:
--
作者:
Cangiani A;Georgoulis EH;Pryer T;Sutton OJ

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对虚元法应用于一般椭圆型问题的后验误差进行了分析。所得到的误差估计是残差型的,适用于非常一般的多边形/多面体网格。估计器是完全可计算的,因为它只依赖于VEM解中可用的数量,即它的自由度和单元多项式投影。证明了误差估计量相对于VEM逼近误差的上界和下界。在许多测试问题中,使用误差估计器驱动自适应网格细化。网格自适应特别容易实现,因为允许具有连续共面边/面的元素,因此,局部自适应网格不需要任何局部网格后处理。
An posteriori error analysis for the virtual element method (VEM) applied to general elliptic problems is presented. The resulting error estimator is of residual-type and applies on very general polygonal/polyhedral meshes. The estimator is fully computable as it relies only on quantities available from the VEM solution, namely its degrees of freedom and element-wise polynomial projection. Upper and lower bounds of the error estimator with respect to the VEM approximation error are proven. The error estimator is used to drive adaptive mesh refinement in a number of test problems. Mesh adaptation is particularly simple to implement since elements with consecutive co-planar edges/faces are allowed and, therefore, locally adapted meshes do not require any local mesh post-processing.
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