arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.02274math.NAcs.NA
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演化曲面上非线性Cahn-Hilliard型方程的稳定性和误差估计

Stability and error estimates for non-linear Cahn-Hilliard-type equations on evolving surfaces

Cedric Aaron Beschle, Balázs Kovács

摘要:

本文研究了具有给定速度的发展曲面上的Cahn-Hilliard型四阶非线性发展方程,其中非线性项仅具有局部Lipschitz导数.采用高阶演化曲面有限元对弱方程组进行空间离散,导出了半离散问题的修正矩阵向量列式。通过空间离散化保持了方程系统的反对称结构。一个新的稳定性证明,基于这种结构,结合一致性界证明了最优阶和均匀的时间误差估计。本文的结论是各种数值实验。

英文摘要:

In this paper, we consider a non-linear fourth-order evolution equation of Cahn-Hilliard-type on evolving surfaces with prescribed velocity, where the non-linear terms are only assumed to have locally Lipschitz derivatives. High-order evolving surface finite elements are used to discretise the weak equation system in space, and a modified matrix-vector formulation for the semi-discrete problem is derived. The anti-symmetric structure of the equation system is preserved by the spatial discretisation. A new stability proof, based on this structure, combined with consistency bounds proves optimal-order and uniform-in-time error estimates. The paper is concluded by a variety of numerical experiments.

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。

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