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首页> 外文期刊>Computer Methods in Applied Mechanics and Engineering >On stabilized mixed methods for generalized Stokes problem based on the velocity-pseudostress formulation: A priori error estimates
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On stabilized mixed methods for generalized Stokes problem based on the velocity-pseudostress formulation: A priori error estimates

机译:基于速度拟应力公式的广义斯托克斯问题的稳定混合方法:先验误差估计

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摘要

In this paper we present an augmented mixed formulation applied to generalized Stokes problem and uses it as state equation in an optimal control problem. The augmented scheme is obtained adding suitable least squares terms to the corresponding velocity-pseudostress formulation of the generalized Stokes problem. To ensure the existence and uniqueness of solution, at continuous and discrete levels, we prove coerciveness of the corresponding augmented bilinear form, and using approximation properties of the respective discrete subspaces, we deduce the optimal rate of convergence. As by product, and considering the associated optimal control problem, we derive error estimates for the approximated control unknown. Finally, we present several numerical examples confirming the theoretical properties of this approach.
机译:在本文中,我们提出了一种适用于广义Stokes问题的增强混合公式,并将其用作状态方程在最优控制问题中。通过将适当的最小二乘项添加到广义Stokes问题的相应速度-伪应力公式中,可以获得增强方案。为了确保解的存在性和唯一性,在连续和离散级别上,我们证明了相应的增广双线性形式的矫顽性,并使用各个离散子空间的逼近性质,得出了最优的收敛速度。作为副产品,并考虑相关的最佳控制问题,我们推导了近似控制未知量的误差估计。最后,我们提供了几个数值示例,证实了此方法的理论特性。

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