计算物理 ›› 2013, Vol. 30 ›› Issue (4): 483-490.

• 论文 • 上一篇    下一篇

预处理JFNK方法求解非平衡辐射扩散方程组

冯涛1,2, 蔚喜军3, 安恒斌3, 张荣培2   

  1. 1. 中国科学技术大学 数学科学学院, 合肥 230052;
    2. 中国工程物理研究院 研究生部, 北京 100088;
    3. 北京应用物理与计算数学研究所 计算物理实验室, 北京 100094
  • 收稿日期:2012-10-10 修回日期:2013-01-24 出版日期:2013-07-25 发布日期:2013-07-25
  • 作者简介:冯涛(1984-),male,doctor,major in computational mathematics,E-mail:fengta02@mail.ustc.edu.cn
  • 基金资助:
    Supported by National Natural Science Foundation of China(11171039,11171038,11271054);National Basic Research Program of China(2011CB309702,2011CB309703);Science Foundation of CAEP(2012B0202026,2010A0202010);Foundation of National Key Laborotory of Science and Technology on Computation Physics and Defence Industrial Technology Development Program(B1520110011)

Preconditioned Jacobian-free Newton-Krylov Methods for Nonequilibrium Radiation Diffusion Equations

FENG Tao1,2, YU Xijun3, AN Hengbin3, ZHANG Rongpei2   

  1. 1. School of Mathmatical Sciences, University of Science and Technology of China, Hefei 230052, China;
    2. Graduate School of China Academy Engineering Physics, Beijing 100088, China;
    3. National Key Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
  • Received:2012-10-10 Revised:2013-01-24 Online:2013-07-25 Published:2013-07-25
  • Supported by:
    Supported by National Natural Science Foundation of China(11171039,11171038,11271054);National Basic Research Program of China(2011CB309702,2011CB309703);Science Foundation of CAEP(2012B0202026,2010A0202010);Foundation of National Key Laborotory of Science and Technology on Computation Physics and Defence Industrial Technology Development Program(B1520110011)

摘要: 分别采用四种半隐式离散方法构造预处理.针对一维辐射扩散方程组,采用预处理的Jacobian-free Newton-Krylov(PJFNK)求解.数值结果表明预处理方法能够很好地改进JFNK方法的收敛行为.

关键词: 非平衡辐射扩散, Newton-Krylov方法, 线性化, 预处理

Abstract: Four semi-implicit discretization schemes are used to construct preconditioners.And preconditioned Jacobian-free Newton-Krylov (JFNK) are presented to solve one-dimensional problems.Numerical results show that the preconditioning methods improve the convergence behavior of JFNK method dramatically.

Key words: nonequilibrium radiation diffusion, Newton-Krylov method, linearization, preconditioning

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