计算物理 ›› 2012, Vol. 29 ›› Issue (2): 198-204.

• 论文 • 上一篇    下一篇

二维柱几何非定常中子输运方程基于格式的界面预估校正并行算法

魏军侠, 袁光伟, 阳述林, 申卫东   

  1. 北京应用物理与计算数学研究所, 北京 100088
  • 收稿日期:2011-05-10 修回日期:2011-08-05 出版日期:2012-03-25 发布日期:2012-03-25
  • 作者简介:魏军侠(1975-),女,副研究员,从事中子输运方程计算方法与并行算法研究,E-mail:wei_junxia@iapcm.ac.cn
  • 基金资助:
    基础科研计划(B1520110011);国家重点基础研究专项经费(2011CB309705);中国工程物理研究院科学技术发展基金(2008A0202008)资助项目

A Parallel Algorithm with Interface Prediction and Correction for Time-dependent Transport Equation in 2D Cylindrical Geometry

WEI Junxia, YUAN Guangwei, YANG Shulin, SHEN Weidong   

  1. Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
  • Received:2011-05-10 Revised:2011-08-05 Online:2012-03-25 Published:2012-03-25

摘要: 针对二维柱几何非定常中子输运方程的Sn-间断有限元方法,提出基于格式的界面预估校正并行算法.数值算例表明,该并行算法在精度与并行度等诸方面均具有良好的性质,与已有的基于隐式格式的并行扫描算法相比,对于二维中子输运大规模计算问题,并行计算效率较高,并行加速比可增加-倍以上,且可保持原隐式格式的计算精度.

关键词: 中子输运方程, 间断有限元方法, 区域分解, Sn扫描算法, 界面预估校正

Abstract: For discontinuous finite element method of time-dependent neutron transport equations in 2D cylindrical geometry,a parallel algorithm with interface prediction and correction is designed.Numerical experiments show that the parallel algorithm with explicit prediction and implicit correction has good precision,parallelism and simplicity.Compared with parallel algorithm based on implicit scheme,the new parallel algorithm has higher parallel efficiency with accuracy-preserving.Especially,it achieves super-linear speedup on hundreds of processors for large-scale problems.

Key words: transport equation, discontinuous finite element, domain decomposition, sweep algorithm, interface prediction and correction

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