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arXiv 2103.03285math.NAcs.NA
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非均质两相流的顶点格式

A vertex scheme for two-phase flow in heterogeneous media

M. S. Joshaghani, V. Girault, B. Riviere

摘要:

本文采用一阶有限元法,结合质量集中和通量上绕,对多孔介质中不混溶两相流进行了数值解。未知量是物理相压力和相饱和度。我们的数值实验证实,该方法收敛最佳制造的解决方案。对于结构化和非结构化网格,我们观察到的高精度润湿饱和度的配置文件,确保最小的数值扩散在前面。在二维和三维的四分之五点的问题进行几个例子,我们表明,该方法可以很容易地处理在渗透率场的不均匀性。使该方法吸引油藏模拟器的两个明显特征是:(i)满足最大值原理,和(ii)局部质量平衡守恒。

英文摘要:

This paper presents the numerical solution of immiscible two-phase flows in porous media, obtained by a first-order finite element method equipped with mass-lumping and flux up-winding. The unknowns are the physical phase pressure and phase saturation. Our numerical experiments confirm that the method converges optimally for manufactured solutions. For both structured and unstructured meshes, we observe the high-accuracy wetting saturation profile that ensures minimal numerical diffusion at the front. Performing several examples of quarter-five spot problems in two and three dimensions, we show that the method can easily handle heterogeneities in the permeability field. Two distinct features that make the method appealing to reservoir simulators are: (i) maximum principle is satisfied, and (ii) mass balance is locally conserved.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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