Hybrid monotonicity-preserving piecewise parabolic method for compressible Euler equations

Hybrid monotonicity-preserving piecewise parabolic method for compressible Euler equations
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可压缩欧拉方程的混合单调性保持分段抛物线法

DOI:
10.1016/j.compfluid.2017.09.008
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发表时间:
2017-12
影响因子:
2.8
通讯作者:
Zeyao Mo
Zeyao Mo
中科院分区:
工程技术3区
文献类型:
--
作者:
Yaqun Yu;Baolin Tian;Zeyao Mo

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在这篇文章中,我们提出了一个高精度高分辨率的混合格式具有强鲁棒性的可压缩欧拉方程的解决方案,特别是那些涉及到强间断。Suresh和Huynh的五阶单调性保持(MP5)格式具有较高的精度,但其鲁棒性相对较弱。为了提高MP5格式的鲁棒性和分辨率,将MP5格式与四阶分段抛物方法(PPM)进行互补共轭。采用自适应约束检测当前位置采用哪种方案,保证了算法的鲁棒性和高精度。通过数值实验,我们的混合格式比传统格式和He的混合格式MP5-R具有更强的鲁棒性和更高的分辨率,而不损失精度。
In this article, we present a high-accuracy high-resolution hybrid scheme with strong robustness for solutions of compressible Euler equations, particularly those relating to strong discontinuity. The fifth-order monotonicity-preserving (MP5) scheme of Suresh and Huynh has high accuracy; however, its robustness is relatively weak. To improve the robustness and resolution, the MP5 scheme is conjugated with a fourth-order piecewise parabolic method (PPM) in a complementary approach. An adaptive constraint is used to detect which scheme is applied at the current position to guarantee the strong robustness and high accuracy. Through numerical experiments, our hybrid scheme demonstrates a stronger robustness and higher resolution than the traditional scheme and the hybrid scheme MP5-R by He without loss of accuracy.
欧拉方程的一种改进的精确单调性保持格式
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