...
首页> 外文期刊>Journal of Computational Physics >A moment limiter for the discontinuous Galerkin method on unstructured tetrahedral meshes
【24h】

A moment limiter for the discontinuous Galerkin method on unstructured tetrahedral meshes

机译:非连续性Galerkin方法在非结构化四面体网眼上的时刻限制器

获取原文
获取原文并翻译 | 示例
           

摘要

We propose a moment limiter for the second order discontinuous Galerkin method on unstructured meshes of tetrahedra. We provide a systematic way for reconstructing and limiting the solution moments from the cell averages. Our analysis, which is based on the linear advection equation, reveals a restriction on the time step and local intervals in which each moment must belong such that a local maximum principle is satisfied. The time step restriction is based on a new measure of cell size that is approximately twice as large as the radius of the inscribed sphere that is typically used. Finally, we discuss limiting across reflecting boundaries for the Euler equations. The efficacy of our limiting algorithm is demonstrated with a number of test problems. Crown Copyright (C) 2019 Published by Elsevier Inc. All rights reserved.
机译:我们提出了一项针对二阶空间伽脉金属的时刻限制器对四面体的非结构化网格。 我们提供系统的系统方法,用于重建和限制来自小区平均值的解决方案。 我们的分析基于线性的平流方程,揭示了对每个时刻必须属于的时间步长和局部间隔的限制,使得满足局部最大原理。 时间步骤限制基于细胞尺寸的新测量,其大约是通常使用的铭式球体的半径的两倍。 最后,我们讨论了欧拉方程的反映边界的限制。 我们的限制算法的效果被呈现了许多测试问题。 2019年Elsevier Inc.版权所有的皇家版权(c)2019年保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号