arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2409.01433math.NAcs.LGcs.NAmath-phmath.MP
收藏

基于区域分解的算子推断降阶模型通过Schwarz交替法耦合

Domain Decomposition-based coupling of Operator Inference reduced order models via the Schwarz alternating method

Virginia Tech(弗吉尼亚理工大学);Sandia National Laboratories(桑迪亚国家实验室)

Ian Moore, Christopher Wentland, Anthony Gruber, Irina Tezaur

AI总结:

本文提出OpInf-Schwarz方法,通过重叠Schwarz交替法耦合子区域局部OpInf降阶模型与全阶模型,在二维热方程测试中验证了其准确性、效率及对任意模型组合的耦合能力。

摘要:

本文提出并评估了一种方法,用于将通过非侵入式算子推断(OpInf)构建的子区域局部降阶模型(ROMs)相互之间以及与子区域局部全阶模型(FOMs)进行耦合,该方法遵循给定偏微分方程(PDE)所定义的空间几何的区域分解。子区域局部模型的连接是通过重叠Schwarz交替法实现的,这是一种最小侵入式的多尺度耦合技术,通过将单一整体问题转化为一系列子区域局部问题来工作,这些局部问题通过在子区域接口上施加的传输边界条件进行通信。在为OpInf ROMs制定了重叠Schwarz交替法(称为OpInf-Schwarz)之后,我们在涉及二维空间中热方程的几个测试用例上评估了该方法的准确性和效率。我们证明该方法能够耦合OpInf ROMs和FOMs的任意组合,并且在执行OpInf ROM耦合时,相对于单一整体FOM可以实现加速。

英文摘要:

This paper presents and evaluates an approach for coupling together subdomain-local reduced order models (ROMs) constructed via non-intrusive operator inference (OpInf) with each other and with subdomain-local full order models (FOMs), following a domain decomposition of the spatial geometry on which a given partial differential equation (PDE) is posed. Joining subdomain-local models is accomplished using the overlapping Schwarz alternating method, a minimally-intrusive multiscale coupling technique that works by transforming a monolithic problem into a sequence of subdomain-local problems, which communicate through transmission boundary conditions imposed on the subdomain interfaces. After formulating the overlapping Schwarz alternating method for OpInf ROMs, termed OpInf-Schwarz, we evaluate the method's accuracy and efficiency on several test cases involving the heat equation in two spatial dimensions. We demonstrate that the method is capable of coupling together arbitrary combinations of OpInf ROMs and FOMs, and that speed-ups over a monolithic FOM are possible when performing OpInf ROM coupling.

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。

↑