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High Order Central Schemes Applied to Relativistic Multi-Component Flow Models

机译:高阶中心方案应用于相对论多分量流模型

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摘要

The dynamics of inviscid multi-component relativistic fluids may be modeled by the relativistic Euler equations, augmented by one (or more) additional species equation(s). We use the high-resolution staggered central schemes to solve these equations. The equilibrium states for each component are coupled in space and time to have a common temperature and velocity. The current schemes can handle strong shocks and the oscillations near the interfaces are negligible, which usually happens in the multi-component flows. The schemes also guarantee the exact mass conservation for each component, the exact conservation of total momentum, and energy in the whole particle system. The central schemes are robust, reliable, compact and easy to implement. Several one- and two-dimensional numerical test cases are included in this paper, which validate the application of these schemes to relativistic multi-component flows.
机译:可以通过相对论的欧拉方程对无粘性的多组分相对论流体进行动力学建模,并用一个(或多个)附加物种方程进行扩充。我们使用高分辨率的交错中心方案来求解这些方程。每个成分的平衡状态在空间和时间上耦合在一起,以具有共同的温度和速度。当前的方案可以处理强烈的冲击,并且界面附近的振动可以忽略不计,这通常发生在多组分流中。该方案还保证了每个组分的精确质量守恒,总动量的精确守恒以及整个粒子系统中的能量。中心方案坚固,可靠,紧凑且易于实施。本文包括几个一维和二维数值测试案例,这些案例验证了这些方案在相对论多分量流中的应用。

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