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Tracking entropy wave in ideal MHD equations by weighted ghost fluid method

机译:加权鬼流体法跟踪理想MHD方程中的熵波

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摘要

The present paper is devoted to the computation of 1D magnetohydrodynamics (MHD) equations. We use a level set function to track the motion of the interface of the entropy wave. In addition, by considering a convex combination of the entropy-fixed ghost value and the density-fixed ghost value, the ghost fluid method (GFM) for multimaterial flows is extended. The resulting weighted ghost fluid method (WGFM) is combined with the fourth-order CWENO-type central-upwind scheme for approximating the numerical solution of 1D MHD equations in the real fluid and the ghost fluid. Computational results are eventually provided and discussed.
机译:本文致力于一维磁流体动力学(MHD)方程的计算。我们使用一个水平集函数来跟踪熵波界面的运动。另外,通过考虑熵固定幻影值和密度固定幻影值的凸组合,扩展了用于多材料流的幻影流体方法(GFM)。所得的加权幻影流体方法(WGFM)与四阶CWENO型中央逆风方案相结合,用于逼近真实流体和幻影流体中的一维MHD方程的数值解。最终提供并讨论了计算结果。

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