Geometrical interpretation of the multi‐point flux approximation L‐method

Geometrical interpretation of the multi‐point flux approximation L‐method
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多点通量近似 Lâ 方法的几何解释

DOI:
10.1002/fld.1926
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发表时间:
2009
影响因子:
1.8
通讯作者:
B. I. Wohlmuth
B. I. Wohlmuth
中科院分区:
工程技术4区
文献类型:
--
作者:
R. Helmig;B. I. Wohlmuth

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本文首先通过对多点通量近似(MPFA) O‐和多点通量近似(MPFA) L‐方法的数值比较,研究了不同的Dirichlet边界离散化对多点通量近似(MPFA) L‐方法收敛速度的影响,并说明了这种新方法以合适的方式处理Dirichlet边界条件的重要性。提出了一种新的Dirichlet边界策略,该策略在一定程度上能较好地恢复法向速度的超收敛速率。第二部分研究了均匀介质下的MPFA - L -方法。给出并说明了L -方法的系统概念和几何解释,从而对L -方法有了更深入的了解。最后,我们将MPFA L -方法应用于不同四边形网格上多孔介质的两相流动,并将其压力和饱和度的数值结果与两点通量近似方法的结果进行了比较。版权所有©2008 John Wiley & Sons, Ltd
In this paper, we first investigate the influence of different Dirichlet boundary discretizations on the convergence rate of the multi‐point flux approximation (MPFA) L‐method by the numerical comparisons between the MPFA O‐ and L‐method, and show how important it is for this new method to handle Dirichlet boundary conditions in a suitable way. A new Dirichlet boundary strategy is proposed, which in some sense can well recover the superconvergence rate of the normal velocity. In the second part of the work, the MPFA L‐method with homogeneous media is studied. A systematic concept and geometrical interpretations of the L‐method are given and illustrated, which yield more insight into the L‐method. Finally, we apply the MPFA L‐method for two‐phase flow in porous media on different quadrilateral grids and compare its numerical results for the pressure and saturation with the results of the two‐point flux approximation method. Copyright © 2008 John Wiley & Sons, Ltd.
DOI: --
发表时间: 2006
期刊:
影响因子: --
作者:
I. Aavatsmark;G. T. Eigestad;R. A. Klausen
通讯作者: R. A. Klausen
DOI: --
发表时间: 2007
期刊:
影响因子: --
作者:
P. Bastian;Markus Blatt;A. Dedner;C. Engwer;R. Klöfkorn;R. Kornhuber;Mario Ohlberger;O. Sander
通讯作者: O. Sander