Domain decomposition with nonlocal interface boundary conditions

Domain decomposition with nonlocal interface boundary conditions
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具有非局部界面边界条件的域分解

DOI:
10.1016/j.cam.2022.114847
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发表时间:
2023
影响因子:
2.4
通讯作者:
Utyuzhnikov S
Utyuzhnikov S
中科院分区:
数学2区
文献类型:
--
作者:
Utyuzhnikov S

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基于区域分解的数值算法被广泛用于求解边值问题。它们在与并行计算算法结合时特别有效。此外,众所周知,分解可以作为有效的预处理剂。在区域分解方法中,非重叠算法非常有吸引力,因为它们允许在子域中使用独立的网格,并且避免了从一个网格到另一个网格的插值解决方案。另一方面,这些方法的效率很大程度上取决于界面边界条件。本文首次利用steklov - poincar<s:1>算子的非局部近似,提出了一种非重叠算法。这种方法很容易实现。本文的理论和数值结果表明,该方法可以有效地用于近壁湍流模拟。
Numerical algorithms based on domain decomposition are widely used for solving boundary value problems. They are especially efficient in combination with parallel computing algorithms. In addition, as well known, decomposition can work as an effective preconditioner. Among the domain decomposition approaches, non-overlapping algorithms are very attractive since they allow using independent meshes in sub-domains and avoid interpolation of the solution from one mesh to another. On the other hand, the efficiency of these methods strongly depends on the interface boundary conditions. In the current paper, for the first time a non-overlapping algorithm is developed with the use of nonlocal approximations of Steklov–Poincaré operator. The approach can be easily implemented. As demonstrated in the paper, both theoretically and numerically, the proposed approach can effectively be used for near-wall turbulence modeling.
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DOI: --
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影响因子: 2.8
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