提高三维特征线方法计算速度的初步研究

Study on Acceleration of Three Dimensional Characteristics Method

1. Department of Engineering Physics, Tsinghua University, Beijing, 100084, China;
2. Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, 610041, China

摘要: 反应堆物理计算的发展要求进行三维复杂几何的输运计算,特征线方法可以满足这些要求,在实际中的应用中因收敛缓慢和计算时间过长而受到限制。本文结合现有数值加速手段和计算机硬件发展,提出双重广义粗网有限差分加速方法和角度分组的角度并行方法,并将这2种方法应用于三维特征线程序(TCM)中。通过多个基准题进行数值验证,计算结果表明方法在保证计算精度的前提下,可有效缩短原有程序的计算时间。
- 特征线方法 /
- 双重广义粗网有限差分方法 /
- 角度并行 /
- 角度分组 /
- 三维特征线程序(TCM)
Abstract: As the reactor physics computation develops,the neutron transport equation would be solved on three dimensional complex geometry accurately,where the MOC can meet all these needs.However,the slow convergence and long computation time limit its application.Both numerical acceleration method and parallel computing technique are used in this paper to accelerate the MOC.Two-level GCMFD and angular parallelization are implemented into the three dimensional characteristics method code TCM to carry out test calculations in some benchmark problems.The results show a good performance on reducing the number of iterations and speeding up the code while keeping the accuracy of the computation.
- MOC /
- Two-level GCMFD /
- Angular Parallelization /
- Angle Grouping /
- TCM