A Robust High Order Alternative WENO Scheme for the Five-Equation Model

A Robust High Order Alternative WENO Scheme for the Five-Equation Model
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五方程模型的鲁棒高阶替代 WENO 方案

DOI:
10.1007/s10915-021-01529-5
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发表时间:
2021-05
影响因子:
2.5
通讯作者:
Wang Lifeng
Wang Lifeng
中科院分区:
数学2区
文献类型:
--
作者:
Gu Yaguang;Gao Zhen;Hu Guanghui;Li Peng;Wang Lifeng

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高阶方法在可压缩多组分流动的建模中起着重要的作用。然而,它们可能产生负声速,从而导致数值格式的不稳定性。本文提出了高阶有限差分格式的保界限和保正限,在此基础上,在具有理想状态方程和加筋状态方程的接触运动界面问题的整个计算过程中保持了速度和压力的平衡。为便于说明,以高阶可选WENO方案为例。数值算例验证了该理论,并证明了所提保界限和保正限的鲁棒性。
High order methods play important roles in the modelling of compressible multi-component flows. However, they may generate negative sound speed, which leads to an instability of the numerical schemes. In this paper, we propose bound- and positivity-preserving limiters for high order finite difference schemes, based on which the equilibriums of the velocity and pressure are preserved throughout the whole computation of contact moving interface problems with the ideal and stiffened equations of state. For illustration purpose, high order alternative WENO scheme is taken for example. Numerical examples verify the theory and demonstrate the robustness of the proposed bound- and positivity-preserving limiters.
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