Embedded domain Reduced Basis Models for the shallow water hyperbolic equations with the Shifted Boundary Method

Embedded domain Reduced Basis Models for the shallow water hyperbolic equations with the Shifted Boundary Method
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浅水双曲方程的嵌入域简化基模型的位移边界法

DOI:
10.1016/j.cma.2022.115143
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发表时间:
2022
影响因子:
7.2
通讯作者:
Rozza, Gianluigi
Rozza, Gianluigi
中科院分区:
工程技术1区
文献类型:
--
作者:
Zeng, Xianyi;Stabile, Giovanni;Karatzas, Efthymios N.;Scovazzi, Guglielmo;Rozza, Gianluigi

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本文研究了浅水双曲型问题及其降阶模型的全离散嵌入有限元逼近。我们的方法是基于一个固定的背景网格和嵌入式减少的基础上。空间离散的移动边界法结合显式预测器/多校正时间积分,在时间上集成的浅水方程的数值解,无论是全阶和降阶模型。为了改善解流形的近似,也为在离线阶段期间未测试的几何形状,快照已经通过在减少的基础计算之前的插值程序进行了预处理。几何参数化的形状与不同的大小和位置的方法进行了测试。
We consider fully discrete embedded finite element approximations for a shallow water hyperbolic problem and its reduced-order model. Our approach is based on a fixed background mesh and an embedded reduced basis. The Shifted Boundary Method for spatial discretization is combined with an explicit predictor/multi-corrector time integration to integrate in time the numerical solutions to the shallow water equations, both for the full and reduced-order model. In order to improve the approximation of the solution manifold also for geometries that are untested during the offline stage, the snapshots have been pre-processed by means of an interpolation procedure that precedes the reduced basis computation. The methodology is tested on geometrically parametrized shapes with varying size and position.
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DOI: --
发表时间: 1997
期刊:
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