摘要
在研制自主化的几何预处理模块过程中,考虑未来问题域中引入超大规模并行计算,研究了特征线追踪的效率问题。基于特征线程序Open MOC的构造实体几何(CSG)方法和KYLIN-2的点线描述方法,比较了这2种几何描述方法下的特征线串行追踪效率,同时对KYLIN-2的特征线追踪引入空间区域并行处理。结果表明,借助计算机辅助设计(CAD)建模工具并结合空间区域并行追踪,点线描述方法下的特征线追踪具有较高的效率;且空间区域并行追踪具备可行性,表现出良好的并行可扩展性和加速比。
In order to develop an autonomous geometric preprocessing module and, moreover, adapt to the future large-scale parallel computing, the content of ray tracing efficiency is studied. Based on the constructive solid geometry, CSG, and the point-line geometry, which are implemented respectively in OpenMOC and KYLIN-2, the serial tracing efficiencies under these two geometric descriptions are compared. The ray tracing procedure of KYLIN-2 is parallelized in space considering the physical meaning. The results show that with the help of Computer Aided Design, CAD, modeling tool and parallel ray tracing in space, the efficiency of ray tracing has been obviously improved under the point-line geometry. Parallel ray tracing in space is feasible and achieves parallel scalability with high speedup ratio.
引文
[1]明平洲,李治刚,潘俊杰,等.二维特征线输运计算框架Open MOC中的几何构造算法[C].国防科技工业核动力技术创新中心暨核反应堆系统设计技术重点实验室2017年度学术年会,成都,2017.
[2]柴晓明,涂晓兰,芦韡,等.先进中子学栅格程序KYLIN-2中特征线方法模块的开发与验证[J].核动力工程,2016(4):154-159.