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首页> 外文期刊>Journal of Computational Physics >On the HLLC Riemann solver for interface interaction in compressible multi-fluid flow
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On the HLLC Riemann solver for interface interaction in compressible multi-fluid flow

机译:在HLLC Riemann求解器上进行可压缩多流体流中的界面相互作用

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摘要

In this work, the HLLC Riemann solver, which is much more robust, simpler and faster than iterative Riemann solvers, is extended to obtain interface conditions in sharp-interface methods for compressible multi-fluid flows. For interactions with general equations of state and material interfaces, a new generalized Roe average is proposed. For single-phase interactions, this new Roe average does not introduce artificial states and satisfies the U-property exactly. For interactions at material interfaces, the U-property is satisfied by introducing ghost states for the internal energy. A number of numerical tests suggest that the proposed Riemann solver is suitable for general equations of state and has an accuracy comparable to iterative Riemann solvers, while being significantly more robust and efficient.
机译:在这项工作中,比迭代Riemann解算器更健壮,更简单和更快的HLLC Riemann解算器得到了扩展,可以在可压缩的多流体流的清晰界面方法中获得界面条件。为了与状态和材料界面的一般方程进行交互,提出了一种新的广义Roe平均值。对于单相相互作用,此新的Roe平均值不会引入人工状态,并且完全满足U属性。对于物质界面上的相互作用,通过引入内部能量的重影状态来满足U属性。大量的数值测试表明,所提出的Riemann求解器适用于一般的状态方程,其精度可与迭代Riemann求解器相提并论,同时具有明显更高的鲁棒性和效率。

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