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Penalty-factor-free discontinuous galerkin methods for 2-dim stokes problems

机译:2点斯托克斯问题的无罚因子不连续伽勒金方法

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摘要

This paper presents two new finite element methods for two-dimensional Stokes problems. These methods are developed by relaxing the constraints of the Crouzeix-Raviart nonconforming P1 finite elements. Penalty terms are introduced to compensate for lack of continuity or the divergence-free property. However, there is no need for choosing penalty factors, and the formulations are symmetric. These new methods are easy to implement and avoid solving saddle-point linear systems. Numerical experiments are presented to illustrate the proved optimal error estimates.
机译:本文提出了两种新的二维斯托克斯问题的有限元方法。通过放宽Crouzeix-Raviart非协调P1有限元的约束来开发这些方法。引入了惩罚条款以补偿缺乏连续性或无散度的属性。但是,不需要选择惩罚因子,并且公式是对称的。这些新方法易于实现,并且可以避免求解鞍点线性系统。数值实验说明了最佳误差估计。

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