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arXiv 1609.03373math.NAcs.NA
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关于具有良好网格特性的算法用于具有移动边界的 problemas 的方法,基于调和映射热流和DeTurck技巧

On algorithms with good mesh properties for problems with moving boundaries based on the Harmonic Map Heat Flow and the DeTurck trick

University of Warwick(华威大学)

Charles M. Elliott, Hans Fritz

AI总结:

本文提出了一种基于调和映射热流和DeTurck技巧的通用方法,用于获得具有良好网格特性的数值方案,用于具有移动边界的演变子流形问题,包括移动域和有边界的表面。

摘要:

在本文中,我们提出了一种通用方法,用于获得具有良好网格特性的数值方案,用于具有移动边界的演变子流形问题,即具有边界的演变子流形。这包括具有边界的移动域和表面。我们的方法基于所谓的DeTurck技巧的一种变体。通过利用具有边界的流形的调和映射热流的解来重新参数化子流形的演化,我们获得了一个新的速度场,用于子流形的运动。根据这个速度场移动计算网格的顶点,会自动导致子流形及其边界的高质量计算网格。使用[16]中的ALE方法,这一想法可以轻松地集成到计算具有移动边界的物理问题的算法中。

英文摘要:

In this paper, we present a general approach to obtain numerical schemes with good mesh properties for problems with moving boundaries, that is for evolving submanifolds with boundaries. This includes moving domains and surfaces with boundaries. Our approach is based on a variant of the so-called the DeTurck trick. By reparametrizing the evolution of the submanifold via solutions to the harmonic map heat flow of manifolds with boundary, we obtain a new velocity field for the motion of the submanifold. Moving the vertices of the computational mesh according to this velocity field automatically leads to computational meshes of high quality both for the submanifold and its boundary. Using the ALE-method in [16], this idea can be easily built into algorithms for the computation of physical problems with moving boundaries.

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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