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arXiv 1710.08044math.NAcs.NA
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具有巴列中心细化的稳定有限元:任意维度中产生无散度近似

Inf-sup stable finite elements on barycentric refinements producing divergence--free approximations in arbitrary dimensions

Division of Applied Mathematics, Brown University(布朗大学应用数学系);Department of Mathematics, University of Pittsburgh(匹兹堡大学数学系)

Johnny Guzman, Michael Neilan

AI总结:

本文提出若干稳定的有限元配对,用于任意维度的斯托克斯问题,通过局部inf-sup稳定性实现任意维度和多项式次数的无散度近似。

摘要:

我们构造了若干稳定的有限元配对,用于任意维度的斯托克斯问题。这些空间的关键特征是,散度将离散速度空间映射到离散压力空间;因此,当应用于不可压缩流模型时,这些配对会产生无散度的速度近似。关键结果是局部inf-sup稳定性,对于任意维度和任意多项式次数均成立。基于此结果,我们构建了任意维度和任意多项式次数的全局无散度和稳定配对。

英文摘要:

We construct several stable finite element pairs for the Stokes problem on barycentric refinements in arbitrary dimensions. A key feature of the spaces is that the divergence maps the discrete velocity space onto the the discrete pressure space; thus, when applied to models of incompressible flows, the pairs yield divergence-free velocity approximations. The key result is a local inf-sup stability that holds for any dimension and for any polynomial degree. With this result, we construct global divergence-free and stable pairs in arbitrary dimension and for any polynomial degree.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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