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 2104.12948math.NAcs.NA
收藏

完全非结构对偶四边形网格上的高精度finite difference离散

High-order accurate finite difference discretisations on fully unstructured dual quadrilateral meshes

Yulong Pan, Per-Olof Persson

摘要:

提出了一种新的四边形非结构网格上的高精度数值微分方法。为了区分给定的函数,定义了具有更大平滑特性的辅助函数,当微分时,该辅助函数提供原始函数的导数。该方法将传统的有限差分法推广到任意拓扑结构的网格上,适用于任意维数的任意阶导数和精度。我们证明了使用双四边形网格和细分曲面的基础上的细化方法的数值方案的准确性。该计划适用于解决一系列的偏微分方程,包括线性和非线性,二阶和四阶方程,和时间依赖的一阶方程。

英文摘要:

We present a novel approach for high-order accurate numerical differentiation on unstructured meshes of quadrilateral elements. To differentiate a given function, an auxiliary function with greater smoothness properties is defined which when differentiated provides the derivatives of the original function. The method generalises traditional finite difference methods to meshes of arbitrary topology in any number of dimensions for any order of derivative and accuracy. We demonstrate the accuracy of the numerical scheme using dual quadrilateral meshes and a refinement method based on subdivision surfaces. The scheme is applied to the solution of a range of partial differential equations, including both linear and nonlinear, second and fourth order equations, and a time-dependent first order equation.

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。

↑