Data-driven correction reduced order models for the quasi-geostrophic equations: a numerical investigation

Data-driven correction reduced order models for the quasi-geostrophic equations: a numerical investigation
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准地转方程的数据驱动校正降阶模型:数值研究

DOI:
10.1080/10618562.2020.1723556
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发表时间:
2020
影响因子:
1.3
通讯作者:
Iliescu, Traian
Iliescu, Traian
中科院分区:
工程技术4区
文献类型:
--
作者:
Mou, Changhong;Liu, Honghu;Wells, David R.;Iliescu, Traian

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本文研究了最近在准地转方程数值模拟中引入的数据驱动校正降阶模型(DDC-ROM)。 DDC-ROM 使用可用数据对校正项进行建模,该校正项通常用于表示低维 ROM 中缺失的信息。在DDC-ROM中添加物理约束,创建约束数据驱动校正降阶模型(CDDC-ROM),以进一步提高其精度和稳定性。最后,DDC-ROM 和 CDDC-ROM 在比训练时间间隔更长的时间间隔上进行测试。数值研究表明,对于低维ROM,DDC-ROM和CDDC-ROM的性能都优于标准Galerkin ROM(G-ROM),并且CDDC-ROM提供了最好的结果。
This paper investigates the recently introduced data-driven correction reduced order model (DDC-ROM) in the numerical simulation of the quasi-geostrophic equations. The DDC-ROM uses available data to model the correction term that is generally used to represent the missing information in low-dimensional ROMs. Physical constraints are added to the DDC-ROM to create the constrained data-driven correction reduced order model (CDDC-ROM) in order to further improve its accuracy and stability. Finally, the DDC-ROM and CDDC-ROM are tested on time intervals that are longer than the time interval over which they were trained. The numerical investigation shows that, for low-dimensional ROMs, both the DDC-ROM and CDDC-ROM perform better than the standard Galerkin ROM (G-ROM) and the CDDC-ROM provides the best results.
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