On shock-capturing schemes using artificial wind

On shock-capturing schemes using artificial wind
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利用人工风捕捉冲击的方案

DOI:
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发表时间:
1999
期刊:
影响因子:
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通讯作者:
K. Takayama
K. Takayama
中科院分区:
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文献类型:
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作者:
I. Sokolov;E. Timofeev;J. Sakai;K. Takayama

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摘要。我们介绍并应用了一种新的方法来构建有效的非振荡冲击捕获方案,用于流体动力学和磁流体动力学模拟。基本思想是在不同的稳定运动参照系中求解控制方程,选择这样一种方式,使流动在那里是超音速的,从而得到简单的逆风通量公式,通过控制体积面。当坐标系发生变化时,在模拟流速度的基础上增加了一个额外的速度(人工风)。这种方法可以简化现有的方案并进行新的修改。实验结果表明,该方法简单有效,计算结果准确。
Abstract. We introduce and apply a new way for the construction of efficient non-oscillatory shock-capturing schemes for fluid dynamic and magneto-hydro-dynamic simulations. The basic idea is to solve the governing equations in different steadily moving frames of reference chosen in such a way that the flow would be supersonic there resulting in simple upwind formulas for fluxes across control volume faces. An extra velocity (artificial wind) is added to the velocity of the flow under simulation when the system of coordinates is changed. The approach allows to simplify existing schemes and to get new modifications. Test problems demonstrate that the derived schemes provide accurate results while being simple and efficient.