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首页> 外文期刊>Journal of Computational Physics >Are upwind techniques in multi-phase flow models necessary?
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Are upwind techniques in multi-phase flow models necessary?

机译:多相流模型中的迎风技术是否必要?

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摘要

Two alternatives of primary variables are compared for two-phase flow in heterogeneous media by solving fully established benchmarks. The first combination utilizes pressure of the wetting fluid and saturation of the non-wetting fluid as primary variables, while the second employs capillary pressure of the wetting fluid and pressure of the non-wetting fluid. While the standard Galerkin finite element method (SGFEM) is known to fail in the physical reproduction of two-phase flow in heterogeneous media (unless employing a fully upwind correction), the second scheme with capillary pressure as a primary variable without applying an upwind technique produces correct physical fluid behaviour in heterogeneous media, as observed from experiments.
机译:通过求解完全确定的基准,比较了非均质介质中两相流主要变量的两个备选方案。第一种组合利用润湿流体的压力和非润湿流体的饱和度作为主要变量,而第二种组合利用润湿流体的毛细管压力和非润湿流体的压力。虽然已知标准的Galerkin有限元方法(SGFEM)无法在非均质介质中物理再现两相流(除非采用完全上风校正),但第二种方案是将毛细压力作为主要变量,而不应用上风技术如实验观察到的,在异质介质中产生正确的物理流体行为。

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