A note on the importance of mass conservation in long-time stability of Navier-Stokes simulations using finite elements

A note on the importance of mass conservation in long-time stability of Navier-Stokes simulations using finite elements
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关于质量守恒对于使用有限元的纳维-斯托克斯模拟的长期稳定性的重要性的说明

DOI:
10.1016/j.aml.2015.01.018
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发表时间:
2015
期刊:
Appl. Math. Lett.
影响因子:
--
通讯作者:
F. Tone
F. Tone
中科院分区:
--
文献类型:
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作者:
Mine A. Belenli;L. Rebholz;F. Tone

文献摘要

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我们证明了空间有限元的长期稳定性结果,即纳维-斯托克斯方程 (NSE) 时间离散化的线性外推 Crank-Nicolson。从这个结果和数值实验中,我们展示了离散质量守恒在 NSE 长期模拟中的重要性。也就是说,我们表明,与那些弱执行质量守恒的元素相比,使用强执行质量守恒的元素可以在很长一段时间内提供更准确的解决方案。
We prove a long-time stability result for the finite element in space, linear extrapolated Crank–Nicolson in time discretization of the Navier–Stokes equations (NSE). From this result and a numerical experiment, we show the importance of discrete mass conservation in long-time simulations of the NSE. That is, we show that using elements that strongly enforce mass conservation can provide significantly more accurate solutions over long times, compared to those that enforce it weakly.