Time discrete scheme matched adaptive time step for particle transport equations

详细信息	查看全文 | 推荐本文 |

• 作者：Zhenying Hong ; ¹ ; ^{zyhong@iapcm.ac.cn} ; Guangwei Yuan ; Xuedong Fu ; Shulin Yang
• 关键词：Adaptive time step ; Exponential method ; Diamond difference ; Second-order time evolution scheme
• 刊名：Progress in Nuclear Energy
• 出版年：2012
• 期刊代码：42_01491970
• 类别：pw
• 出版时间：August, 2012
• 卷：59
• 期：Complete
• 页码：6-11
• 文件大小：469 K

摘要

The conventional time discrete schemes seldom consider adaptive time step. Therefore some physical quantity for time variable exits numerical oscillation. The motivation in this paper is to provide a time discrete scheme which matches adaptive time step. The typical exponential method, diamond difference and modified time discrete scheme, second-order time evolution scheme are researched for adaptive time step. Some numerical results show that time differential curves (particle current especially) are very smooth for second-order time evolution scheme associated the exponential method.