2026-08-19T21:41:07Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/79692023-11-10T01:05:39Zcom_10259_6229com_10259_4534com_10259.4_106com_10259_2604col_10259_6230
Repositorio Institucional de la Universidad de Burgos
author
Alonso Mallo, Isaías
author
Reguera López, Nuria
2023-11-09T10:35:22Z
2023-11-09T10:35:22Z
2024-03
0377-0427
http://hdl.handle.net/10259/7969
10.1016/j.cam.2023.115629
When applied to stiff problems, the effective order of convergence of general linear methods is governed by their stage order, which is less than or equal to the classical order of the method. This produces an order reduction phenomenon, present in all general linear methods except those with high stage order, in a manner similar to that observed in other time integrators with internal stages. In this paper, we investigate the order reduction which arises when general linear methods are used as time integrators when using the method of lines for solving numerically initial boundary value problems with time dependent boundary values. We propose a technique, based on making an appropriate choice of the boundary values for the internal stages, with which it is possible to recover one unit of order, as we
prove in this work. As expected, this implies a considerable improvement for the general linear methods suffering order reduction. Moreover, numerical experiments show that the improvement is not only in these cases, but that, even when the order reduction is not expected, the size of the errors is drastically reduced by using the technique proposed in this paper.
eng
Atribución-NoComercial 4.0 Internacional
Order reduction
General linear methods
Initial boundary value problems
Avoiding order reduction phenomenon for general linear methods when integrating linear problems with time dependent boundary values
info:eu-repo/semantics/article
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URL
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Alonso-jcam_2024.pdf