arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0801.2248math.NAcs.NA
收藏

Oldroyd-B模型的自由能耗散格式

Free-energy-dissipative schemes for the Oldroyd-B model

INSTITUT NATIONAL DE RECHERCHE EN INFORMATIQUE ET EN AUTOMATIQUE(法国国家信息与自动化研究所)

Sébastien Boyaval, Tony Lelièvre, Claude Mangoubi

AI总结:

本文分析粘弹性流体微分模型数值格式的稳定性,以Oldroyd-B模型为例,证明数值格式在何种假设下满足自由能耗散,并解释基于对数公式的离散化更稳定的原因。

摘要:

本文分析了粘弹性流体微分模型的各种数值格式的稳定性。更确切地说,我们考虑了典型的Oldroyd-B模型,该模型具有自由能耗散性质,并证明了在何种假设下数值格式也满足这种耗散。在我们分析的数值格式中,我们考虑了基于Fattal和Kupferman提出的Oldroyd-B系统对数公式的离散化,这些离散化在某些基准问题中已被报道比通常公式的离散化在数值上更稳定。我们的分析为理解这些数值观测提供了一些线索。

英文摘要:

In this article, we analyze the stability of various numerical schemes for differential models of viscoelastic fluids. More precisely, we consider the prototypical Oldroyd-B model, for which a free energy dissipation holds, and we show under which assumptions such a dissipation is also satisfied for the numerical scheme. Among the numerical schemes we analyze, we consider some discretizations based on the log-formulation of the Oldroyd-B system proposed by Fattal and Kupferman, which have been reported to be numerically more stable than discretizations of the usual formulation in some benchmark problems. Our analysis gives some tracks to understand these numerical observations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑