用于平流-扩散-反应方程的流线型导数po - rom

S. Rubino
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引用次数: 9

摘要

提出了一种新的基于流线导数投影的闭包建模策略,用于正交分解降阶模型(porom)的数值稳定。作为第一步,对该模型进行了以平流为主的平流-扩散-反应方程的分析和测试。在此框架下,通过给出相应的误差估计,对所提出的新型po - rom的有限元离散化进行了数值分析。对平流占优状态的数值测试表明了所提出方法的效率,以及比标准po - rom精度的提高,标准po - rom在考虑的数值设置中很快发现其众所周知的局限性,即低扩散系数。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A streamline derivative POD-ROM for advection-diffusion-reaction equations
We introduce a new streamline derivative projection-based closure modeling strategy for the numerical stabilization of Proper Orthogonal Decomposition-Reduced Order Models (POD-ROM). As a first preliminary step, the proposed model is analyzed and tested for advection-dominated advection-diffusion-reaction equations. In this framework, the numerical analysis for the Finite Element (FE) discretization of the proposed new POD-ROM is presented, by mainly deriving the corresponding error estimates. Numerical tests for advection-dominated regime show the effciency of the proposed method, as well the increased accuracy over the standard POD-ROM that discovers its well-known limitations very soon in the numerical settings considered, i.e. for low diffusion coeffcients.
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