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arXiv 2109.04013math.NAcs.NA
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求解近无粘和不可压缩流动的新型稳定化 $P_1\ imes P_0$ 有限元方法

New stabilized $P_1\times P_0$ finite element methods for nearly inviscid and incompressible flows

Yuwen Li, Ludmil Zikatanov

AI总结:

本文提出一种新型稳定化 $P_1\ imes P_0$ 有限元方法求解不可压缩 Navier--Stokes 方程,基于静态凝聚面泡函数的简化 Bernardi--Raugel 元实现压力鲁棒,无需调参且在2维和3维基准问题上具竞争力。

摘要:

本文提出了一种新型稳定化 $P_1\ imes P_0$ 有限元方法,用于求解不可压缩 Navier--Stokes 方程。该数值格式基于静态凝聚面泡函数的简化 Bernardi--Raugel 元,在小粘性情况下具有压力鲁棒性。对于 Stokes 问题,给出了关于运动粘性一致的误差估计。对于 Navier--Stokes 方程,非线性对流项采用边平均有限元方法进行离散。与经典格式相比,该方法无需调整参数,并在2维和3维空间的多个基准问题上验证了其竞争力。

英文摘要:

This work proposes a new stabilized $P_1\times P_0$ finite element method for solving the incompressible Navier--Stokes equations. The numerical scheme is based on a reduced Bernardi--Raugel element with statically condensed face bubbles and is pressure-robust in the small viscosity regime. For the Stokes problem, an error estimate uniform with respect to the kinematic viscosity is shown. For the Navier--Stokes equation, the nonlinear convection term is discretized using an edge-averaged finite element method. In comparison with classical schemes, the proposed method does not require tuning of parameters and is validated for competitiveness on several benchmark problems in 2 and 3 dimensional space.

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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