计算物理 ›› 1992, Vol. 9 ›› Issue (S1): 501-505.

• 论文 • 上一篇    下一篇

物理问题的数值模拟及高精度差分格式

傅德薰, 马延文   

  1. 中科院力学所, LNM, 北京 100080
  • 收稿日期:1992-04-30 出版日期:1992-12-31 发布日期:1992-12-31
  • 基金资助:
    国家自然科学基金资助

NUMERICAL SIMULATION OF PHYSICAL PROBLEMS WITH HIGH ORDER ACCURATE SCHEMES

Fu Dexun, Ma Yanwen   

  1. LNM Institute of Mechanics CAS, Beijing 100080
  • Received:1992-04-30 Online:1992-12-31 Published:1992-12-31

摘要: 本文分析了模拟多尺度物理问题对差分格式的要求,并指出,为了正确模拟小尺度物理量,要求采用高精度差分格式。文中利用文献[1]作者提出的耗散比拟思想,给出了构造具有耗散机制的高精度紧致差分格式的方法。并采用时间为三阶精度,空间为四阶精度的差分方法求解二维欧拉方程,给出了激波反射问题的计算结果。所得结果表明,本文给出的能模拟小尺度物理量的高精度差分方法也能正确模拟宏观尺度的激波。

关键词: 紧致差分, 耗散型格式, 数值模拟

Abstract: Inorder to simulate multiscale physical problems constructing high order accurate difference schemes is needed. The fourth order accurate compact scheme is reconstructed using the method of diffusion analogy developed by authors in order to make the scheme dissipative. The modified compact scheme with fourth order accuracy in space and third order accuracy in time is used to compute the 2-D shock reflection problems. The computed results show the scheme developod to correctly simulate multiscaler physical problems also can be used to capture the shock well.

Key words: compact difference, disspative difference scheme, numerical simulation