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arXiv 1801.08352math.NAcs.NA
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Biot方程固定应力分裂方案的数值研究:调谐参数的最优性

Numerical investigation on the fixed-stress splitting scheme for Biot's equations: Optimality of the tuning parameter

University of Bergen(卑尔根大学);Helmut-Schmidt-University, University of the Federal Armed Forces Hamburg(赫尔穆特·施密特大学,德国联邦国防军汉堡大学)

Jakub Wiktor Both, Uwe Köcher

AI总结:

本文研究了通过固定应力分裂方案迭代求解准静态线性Biot方程的数值解,探讨了调谐参数的最优性,并将其与文献中基于物理和数学动机的值进行比较,发现调谐参数的最佳值还受到边界条件和流体流动问题相关材料参数的影响。

摘要:

我们研究了通过固定应力分裂方案迭代求解准静态线性Biot方程的数值解。在每次迭代中,力学和流动问题被解耦,其中流动问题通过保持人工平均应力固定来求解。这引入了一个数值调谐参数,可以被优化。我们数值研究了该参数的最优性,并将其与文献中基于物理和数学动机的值进行比较,这些值通常仅依赖于力学材料参数。我们证明,调谐参数的最佳值还受到边界条件和与流体流动问题相关的材料参数的影响,这表明需要在进一步的数学分析中整合这些因素以优化调谐参数。

英文摘要:

We study the numerical solution of the quasi-static linear Biot's equations solved iteratively by the fixed-stress splitting scheme. In each iteration the mechanical and flow problems are decoupled, where the flow problem is solved by keeping an artificial mean stress fixed. This introduces a numerical tuning parameter which can be optimized. We investigate numerically the optimality of the parameter and compare our results with physically and mathematically motivated values from the literature, which commonly only depend on mechanical material parameters. We demonstrate, that the optimal value of the tuning parameter is also affected by the boundary conditions and material parameters associated to the fluid flow problem suggesting the need for the integration of those in further mathematical analyses optimizing the tuning parameter.

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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