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Darcy-Stokes方程的一种非协调有限元新方法

A new nonconforming finite element method for the Darcy-Stokes equation
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摘要 Darcy-Stokes方程的统一有限元方法是研究Darcy-Stokes耦合问题的基础.尽管该方法采用等阶或低阶有限元逼近在工程计算上有较大的实际应用价值,但这类有限元组合不满足inf-sup条件,因而会造成数值求解的困难.而非协调有限元更容易满足离散的inf-sup条件,因而在计算耦合问题时比协调有限元更具吸引力.本文对Darcy-Stokes方程提出了一种等阶线性非协调稳定化有限元方法,证明了该格式是稳定的,并得到了最优误差估计. The unified finite element method for Darcy-Stokes equations underlies the study of the cou- pled problems of Darcy-Stokes. Using equal or lower order finite element approximation has great practi cal value in engineering. This paper presents a linear nonconforming stabilized finite element method for the Darcy-stokes equation. It is proved that the scheme is stable. Then optimal error estimates are ob- tained.
出处 《四川大学学报(自然科学版)》 CAS CSCD 北大核心 2013年第5期937-941,共5页 Journal of Sichuan University(Natural Science Edition)
基金 四川省教育厅重点项目(112A026) 内江师范学院项目(12NJZ10)
关键词 等阶有限元 非协调 Darcy-Stokes方程 equal order finite element, nonconiorming, Darcy-Stokes problem
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