计算物理 ›› 1997, Vol. 14 ›› Issue (2): 185-189.

• 论文 • 上一篇    下一篇

辐射传输问题的P2扩散近似

冯庭桂   

  1. 北京应用物理与计算数学研究所, 北京 100088
  • 收稿日期:1996-01-23 修回日期:1996-09-19 出版日期:1997-03-25 发布日期:1997-03-25
  • 基金资助:
    国家863高技术惯性约束聚变主题和国家自然科学基金

P2 DIFFUSION THEORY OF RADIATION TRANSFER PROBLEMS

Feng Tinggui   

  1. Institute of Applied Physics and Computational Mathematics, Beijing 100088
  • Received:1996-01-23 Revised:1996-09-19 Online:1997-03-25 Published:1997-03-25

摘要: 用渐近展开方法,给出和讨论辐射传输问题的P2近似扩散方程,并进行了数值模拟计算。结果表明,P2扩散方法优于普通扩散和限流扩散方法,其数值结果与输运方程结果十分接近。

关键词: 辐射输运, P2扩散, 限流扩散

Abstract: A corrected (P2) diffusion equation is presented for the radiation transfer problems by means of an asymptotic expansion and numerical comparisions of LD (linear discontinued finite element),P2 diffusion, simple diffusion and limited flux diffusion are also given.

Key words: radiation transfer, P2 diffusion, limited-flux diffusion

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