计算物理 ›› 2012, Vol. 29 ›› Issue (5): 633-640.
• 论文 • 下一篇
唐维军, 袁光伟, 沈智军, 程军波
收稿日期:
修回日期:
出版日期:
发布日期:
作者简介:
基金资助:
TANG Weijun, YUAN Guangwei, SHEN Zhijun, CHENG Junbo
Received:
Revised:
Online:
Published:
摘要： 对交错网格上Lagrange预估-校正显示格式的时间步长选取提出新的方法.与经典CFL稳定性理论时间步长选取方法不同,新方法考虑了原始微分方程组的非线性效应,并基于物理量保正性给出了自适应的时间步长选取方法.数值实验验证了该方法有效.
关键词: 保正性, 时间步长, Lagrange预估-校正格式
Abstract: We propose a method of time step for predicator-corrector scheme of Lagrangian method on stagger grids.It is different from CFL time step based on tradional stable theory.The method considers nonlinear effect of original partial differential equations,and gives an adaptive time step based on physical quantities positivity preserving.Numerical results confirm validity of the method.
Key words: positivity preserving, time step, predicator-corrector scheme of Lagrangian method
中图分类号:
O241.82
唐维军, 袁光伟, 沈智军, 程军波. Lagrange方法基于保正性的时间步长[J]. 计算物理, 2012, 29(5): 633-640.
TANG Weijun, YUAN Guangwei, SHEN Zhijun, CHENG Junbo. Positivity Preserving Time Step for Lagrange Method[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2012, 29(5): 633-640.
0 / 推荐
导出引用管理器 EndNote|Ris|BibTeX
链接本文: http://www.cjcp.org.cn/CN/
http://www.cjcp.org.cn/CN/Y2012/V29/I5/633
