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arXiv 2106.06280math.NAcs.NA
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非结构网格Runge-Kutta间断Galerkin方法的紧子胞WENO极限策略

A compact subcell WENO limiting strategy using immediate neighbors for Runge-Kutta discontinuous Galerkin methods for unstructured meshes

S R Siva Prasad Kochi, M Ramakrishna

摘要:

本文将我们最近在2021年发展的用于结构网格的Runge-Kutta间断Galerkin方法的紧致子胞加权本质不振荡(CSWENO)极限策略推广到非结构三角形网格。极限策略的主要思想是将给定单元的直接邻居划分到所需的模板中,并使用WENO重建进行极限。该策略可以应用于任何类型的WENO重建。我们使用了Zhu和Shu在2019年提出的WENO重建,并提供了二维Burgers方程和二维Euler方程的精度测试和结果,以说明这种极限策略的性能。

英文摘要:

In this paper, we generalize the compact subcell weighted essentially non oscillatory (CSWENO) limiting strategy for Runge-Kutta discontinuous Galerkin method developed recently by us in 2021 for structured meshes to unstructured triangular meshes. The main idea of the limiting strategy is to divide the immediate neighbors of a given cell into the required stencil and to use a WENO reconstruction for limiting. This strategy can be applied for any type of WENO reconstruction. We have used the WENO reconstruction proposed by Zhu and Shu in 2019 and provided accuracy tests and results for two-dimensional Burgers' equation and two dimensional Euler equations to illustrate the performance of this limiting strategy.

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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