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arXiv 2202.10073math.NAcs.NA
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代数对偶表示在三维Darcy流区域分解方法中的应用

Use of algebraic dual representations in domain decomposition methods for Darcy flow in 3D domain

V. Jain, A. Palha, M. Gerritsma

摘要:

在这项工作中,我们使用代数对偶表示结合区域分解方法的达西方程。我们定义了破缺的索伯列夫空间及其有限维对应空间。此外,一个全球迹空间的定义,连接之间的破碎空间的解决方案。使用对偶表示导致对速度发散的约束、压力梯度项和跨子域的连续性约束的稀疏度量自由表示。为了证明这一点,我们解决了两个测试案例:i)制造解决方案案例,以及ii)工业基准储层建模问题SPE10。结果表明,区域分解计划,虽然有更多的未知数,需要更少的内存和模拟时间相比,连续Galerkin制定。

英文摘要:

In this work we use algebraic dual representations in conjunction with domain decomposition methods for Darcy equations. We define the broken Sobolev spaces and their finite dimensional counterparts. In addition, a global trace space is defined that connects the solution between the broken spaces. Use of dual representations results in a sparse metric free representation of the constraint on divergence of velocity, the pressure gradient term and on the continuity constraint across the sub domains. To demonstrate this, we solve two test cases: i) manufactured solution case, and ii) industrial benchmark reservoir modelling problem SPE10. The results demonstrate that the domain decomposition scheme, although with more unknowns, requires less memory and simulation time as compared to the continuous Galerkin formulation.

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