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A Finite Element Splitting Method for a Convection-Diffusion Problem
Computational Methods in Applied Mathematics ( IF 1.3 ) Pub Date : 2020-10-01 , DOI: 10.1515/cmam-2020-0128
Vidar Thomée 1
Affiliation  

Abstract For a spatially periodic convection-diffusion problem, we analyze a time stepping method based on Lie splitting of a spatially semidiscrete finite element solution on time steps of length k, using the backward Euler method for the diffusion part and a stabilized explicit forward Euler approximation on m ≥ 1 {m\geq 1} intervals of length k / m {k/m} for the convection part. This complements earlier work on time splitting of the problem in a finite difference context.

中文翻译:

对流扩散问题的一种有限元分裂方法

摘要 对于空间周期对流-扩散问题,我们分析了基于长度为 k 的时间步长的空间半离散有限元解的李分裂的时间步长方法,对扩散部分使用后向欧拉方法和稳定显式前向欧拉近似在 m ≥ 1 {m\geq 1} 间隔的长度 k / m {k/m} 对流部分。这补充了早期在有限差分上下文中对问题进行时间分割的工作。
更新日期:2020-10-01
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