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 2209.02873math.NAcs.NAq-fin.CP
收藏

一种研究变系数偏微分方程紧致格式稳定性与鲁棒性的新型差分方程方法

A novel difference equation approach for the stability and robustness of compact schemes for variable coefficient PDEs

Anindya Goswami, Kuldip Singh Patel, Pradeep Kumar Sahu

AI总结:

针对变系数对流扩散方程的四阶紧致格式,本文提出基于差分方程的稳定性分析方法,给出全离散问题稳定的充分条件,证明常系数情形的无条件稳定性,并分析放大矩阵条件数。

摘要:

本文考虑了变系数对流扩散方程的四阶精度紧致格式。利用基于差分方程的方法,推导了全离散问题稳定性的一个充分条件。常系数问题被作为一种特殊情形加以考虑,并从理论上证明了该情形下紧致格式的无条件稳定性。文中还分析了放大矩阵的条件数,并推导了其估计式。所提供的算例支持了为确保稳定性而采用的假设。

英文摘要:

Fourth-order accurate compact schemes for variable coefficient convection diffusion equations are considered. A sufficient condition for the stability of the fully discrete problem is derived using a difference equation based approach. The constant coefficient problems are considered as a special case, and the unconditional stability of compact schemes for such case is proved theoretically. The condition number of the amplification matrix is also analyzed, and an estimate for the same is derived. The examples are provided to support the assumption taken to assure stability.

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。

↑