High-order spectral volume scheme for multi-component flows using non-oscillatory kinetic flux

High-order spectral volume scheme for multi-component flows using non-oscillatory kinetic flux
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使用非振荡动通量的多组分流的高阶谱体积方案

DOI:
10.1016/j.compfluid.2017.04.014
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发表时间:
2016-03
期刊:
影响因子:
2.8
通讯作者:
Chen Yibing
Chen Yibing
中科院分区:
工程技术3区
文献类型:
--
作者:
Liu Na;Xu Xihua;Chen Yibing

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本文发展了一种求解可压缩多组分流动的任意高阶紧致方法。本文的主要贡献是将高阶、守恒、紧致的谱体积格式(SV)与无振荡的动力学格式(NOK)相结合,求解了可压缩多组分流动的准守恒扩展欧拉方程。新格式由两部分组成:保守部分和非保守部分。利用原有的高阶紧致SV格式直接对守恒部分进行离散。为了处理加筋气体的状态方程,采用NOK格式计算数值通量。然后,仔细分析了满足必要条件,以避免非物理振荡附近的材料界面。在此基础上,得到了非保守部分的高阶紧致格式。该格式对可压缩多组分加筋气体的数值模拟具有如下优点:格式精度高,模板紧凑,界面附近无振荡。数值试验表明,新格式在多组分流动模拟中具有良好的性能和效率。
In this paper, an arbitrary high-order compact method is developed for compressible multi-component flows with a stiffened gas equations of state (EOS). The main contribution is combining the high-order, conservative, compact spectral volume scheme (SV) with the non-oscillatory kinetic scheme (NOK) to solve the quasi-conservative extended Euler equations of compressible multi-component flows. The new scheme consists of two parts: the conservative part and the non-conservative part. The original high order compact SV scheme is used to discretize the conservative part directly. In order to treat the equation of state of the stiffened gas, the NOK scheme is utilized to compute the numerical flux. Then, careful analysis is made to satisfy the necessary condition to avoid unphysical oscillation near the material interfaces. After that, a high-order compact scheme for the non-conservative part is obtained. This new scheme has the following advantages for numerical simulations of compressible multi-component stiffened gas: high order accuracy with compact stencil and oscillation-free near the material interfaces. Numerical tests demonstrate the good performance and the efficiency of the new scheme for multi-component flow simulations.
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