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Assessment of Two Versions of Ghost Fluid Method for 2D Multi-Medium Compressible Flows

机译:二维多介质可压缩流的两种版本的幽灵流体方法的评估

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The ghost fluid method (GFM) provides unified computation of multi-medium flow without tracking the interface explicitly and has received much attention since it was developed in 1999. The original GFM by Fedkiw et al. [1] could only simulate some simple gas-gas flows. It encountered difficulties in computing gas-liquid flows or shock-interface interactions. In 2003, Liu et al. [2] developed a modified version of GFM (denoted as MGFM) which used a ghost fluid status provided by solving approximate Riemann problem. In 2006, Wang et al. [3] further developed a version called RGFM which defines both the real fluid next to the interface and the ghost fluid using solutions of a different set of approximate Riemann problem. In this paper, we assess MGFM and RGFM for treating more complicated gas-liquid flows in one and two dimensions and elaborate on the techniques to define the ghost fluid. The spatial discretization for the Euler equations is the second order TVD scheme and the WENO scheme. The computational effects associated with different sets of approximate Riemann problems are demonstrated for several 2D multi-medium flow problems, including air-helium shock interaction, underwater explosion.
机译:鬼流体方法(GFM)提供了多种介质流的统一计算,而无需显式跟踪界面,自从1999年开发以来,它就受到了广泛的关注。Fedkiw等人的原始GFM。 [1]只能模拟一些简单的燃气流。在计算气液流量或冲击界面相互作用时遇到了困难。 2003年,Liu等人。 [2]开发了GFM的修改版本(表示为MGFM),该版本使用了通过解决近似黎曼问题而提供的幻影流体状态。 2006年,Wang等。 [3]进一步开发了一个称为RGFM的版本,该版本使用一组不同的近似Riemann问题的解定义了界面附近的真实流体和幻影流体。在本文中,我们评估了MGFM和RGFM用于在一维和二维中处理更复杂的气液流动,并详细说明了定义幻影流体的技术。欧拉方程的空间离散化是二阶TVD方案和WENO方案。对于几种2D多媒体流问题,包括气氦冲击相互作用,水下爆炸,都证明了与不同的近似黎曼问题集相关的计算效果。

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  • 来源
    《Computational Mechanics》|2007年|1-11|共11页
  • 会议地点 Beijing(CN)
  • 作者

    JI Ying; rnXU Jianbin;

  • 作者单位

    Yan Ding,@Institute of Computational Mathematics and LSEC,Academy of Mathematics and Systems Science,Chinese Academy of Science,Beijing,100080 China--Li Yuan@Institute of Computational Mathematics and LSEC,Academy of Mathematics and Systems Science,Chinese Academy of Science,Beijing,100080 China--;

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