arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1507.08243math.NAcs.NA
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多边形网格的各向异性网格质量度量与自适应

Anisotropic mesh quality measures and adaptation for polygonal meshes

Weizhang Huang, Yanqiu Wang

摘要:

研究了多边形网格的各向异性网格质量度量和各向异性网格自适应。提出了基于最小二乘拟合、基于广义单纯映射和基于边缘矩阵奇异值分解的三种对齐和均匀分布测度。数值试验表明,在给定的度量下,这三套网格质量度量方法都能很好地度量多边形网格的质量。基于其中一组质量测度,利用移动网格偏微分方程,构造了一种各向异性自适应多边形网格方法,用于二阶椭圆型方程的数值解。数值算例验证了该方法的有效性。

英文摘要:

Anisotropic mesh quality measures and anisotropic mesh adaptation are studied for polygonal meshes. Three sets of alignment and equidistribution measures are developed, one based on least squares fitting, one based on generalized barycentric mapping, and the other based on singular value decomposition of edge matrices. Numerical tests show that all three sets of mesh quality measures provide good measurements for the quality of polygonal meshes under given metrics. Based on one of these sets of quality measures and using a moving mesh partial differential equation, an anisotropic adaptive polygonal mesh method is constructed for the numerical solution of second order elliptic equations. Numerical examples are presented to demonstrate the effectiveness of the method.

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