Equal-order finite elements with nodal projection stabilization for Darcy-Forchheimer model

Equal-order finite elements with nodal projection stabilization for Darcy-Forchheimer model
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Darcy-Forchheimer 模型具有节点投影稳定的等阶有限元

DOI:
10.1002/num.22591
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发表时间:
2020
影响因子:
3.9
通讯作者:
许秋燕
许秋燕
中科院分区:
数学3区
文献类型:
--
作者:
张现强;许秋燕

文献摘要

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在本文中,我们提出并分析了一种基于 Darcy-Forchheimer 模型的局部 Scott-Zhang 投影仪的稳定混合有限元方法,使用连续等阶有限元来计算速度和压力。这种类型的方法属于对称稳定技术类别,它提供了对速度散度和压力梯度波动的额外控制。导出了速度的 H(div) 范数中的最佳误差估计以及速度和压力的 L2 范数中的准最佳误差估计。进行数值实验来证明该方法的收敛特性。
In this paper, we propose and analyze a stabilized mixed finite element method based on a local Scott–Zhang projector for Darcy–Forchheimer model, using continuous equal‐order finite elements for the velocity and pressure. This type of method belongs to the class of symmetric stabilization techniques, which provides additional control over the fluctuations of the velocity divergence and pressure gradient. An optimal error estimate in theH(div)‐norm for the velocity and quasi‐optimal error estimates in theL2‐norm for the velocity and pressure are derived. Numerical experiments are performed to demonstrate the convergence properties of the method.