The 'recovered space' advection scheme for lowest-order compatible finite element methods

The 'recovered space' advection scheme for lowest-order compatible finite element methods
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最低阶兼容有限元方法的“恢复空间”平流方案

DOI:
10.1016/j.jcp.2019.04.013
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发表时间:
2019
影响因子:
4.1
通讯作者:
Bendall T
Bendall T
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Bendall T

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提出了一种新的求解可压缩Euler方程的相容有限元平流格式。与Cotter和Kuzmin(2016)和Shipton等人(2018)中描述的离散化不同,离散化使用最低阶兼容有限元空间族,但仍保留二阶数值精度。该方案通过首先在高阶空间中“恢复”函数来获得这种二阶精度,然后使用Cotter和Kuzmin(2016)的间断Galerkin平流方案。以及描述的计划,我们还提出了它的稳定性和策略,以确保有界性。然后,我们通过一些数值试验证明了它的性质,然后在模型中使用它来求解可压缩欧拉方程。
We present a new compatible finite element advection scheme for the compressible Euler equations. Unlike the discretisations described in Cotter and Kuzmin (2016) and Shipton et al. (2018), the discretisation uses the lowest-order family of compatible finite element spaces, but still retains second-order numerical accuracy. This scheme obtains this second-order accuracy by first ‘recovering’ the function in higher-order spaces, before using the discontinuous Galerkin advection schemes of Cotter and Kuzmin (2016). As well as describing the scheme, we also present its stability properties and a strategy for ensuring boundedness. We then demonstrate its properties through some numerical tests, before presenting its use within a model solving the compressible Euler equations.
具有局部限制器的嵌入式不连续伽辽金输运方案
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发表时间: 2016
期刊: J. Comput. Phys.
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