SLAU2 applied to two-dimensional, ideal magnetohydrodynamics simulations

SLAU2 applied to two-dimensional, ideal magnetohydrodynamics simulations
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SLAU2 应用于二维理想磁流体动力学模拟

DOI:
10.1016/j.compfluid.2020.104635
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发表时间:
2020
期刊:
影响因子:
2.8
通讯作者:
Ryu Dongsu
Ryu Dongsu
中科院分区:
工程技术3区
文献类型:
--
作者:
Kitamura Keiichi;Mamashita Tomohiro;Ryu Dongsu

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SLAU 2(Simple Low-dissipation Advection-Upstream-splitting-method 2)数值通量函数是AUSM型方法(3-wave solver)的一种,最初发展并广泛应用于气体动力学,现已应用于二维磁流体动力学(MHD)模拟。根据对广泛的流动和磁条件的数值测试,其可靠性、效率和准确性已经得到证明:i)SLAU 2对冲击异常(例如,在我们的高超音速流动试验的MHD扩展版本中证实了这种现象; 2)与更昂贵的5波解算器HLLD(Harten-Lax-货车_Leer with Discontinuities)相比,计算成本降低了大约3%; 3)然而,它的解的质量几乎等于HLLD的解,而不是非常分散的HLL解。对于基准测试,SLAU 2已成功再现了详细且重要的流动物理学,例如多维冲击/冲击相互作用。我们希望SLAU 2将有助于天体物理学和其他研究领域的进一步发展。
SLAU2 (Simple Low-dissipation Advection-Upstream-splitting-method 2) numerical flux function, one of AUSM-type methods (3-wave solver), originally developed and widely used in gasdynamics, has been applied to two-dimensional magnetohydrodynamics (MHD) simulations. According to numerical tests for a wide range of flow and magnetic conditions, its reliability, efficiency, and accuracy have been demonstrated: i) Robustness of SLAU2 against shock-anomalies (e.g., carbuncle phenomena) has been confirmed in the MHD-extended version of our hypersonic flow test; ii) The computational cost has been reduced for approximately 3% compared with HLLD (Harten-Lax-van_Leer with Discontinuities), a more expensive, 5-wave solver; iii) Nevertheless, its solution qualities are almost equal to those of HLLD, as opposed to very diffused HLL solutions. For benchmark tests, detailed and important flow physics such as multidimensional shock/shock interactions have been successfully reproduced by SLAU2. We hope that SLAU2 will contribute to further progress of the astrophysics and other research fields.
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