一种全堆芯精确到每个通道的子通道并行模拟方法  

Parallel Strategy for Full-core and Real-channel-resolved Thermal-hydraulic Subchannel Simulation

作　　者：王先梦 赵民富[2] 吕玉凤[2] 蔡银宇 储根深 卢旭 王昭顺[1] 郭苏萱 周志锋 胡长军[1] 杨文[2] WANG Xianmeng;ZHAO Minfu;LYU Yufeng;CAI Yinyu;CHU Genshen;LU Xu;WANG Zhaoshun;GUO Suxuan;ZHOU Zhifeng;HU Changjun;YANG Wen(School of Computer and Communication Engineering,University of Science and Technology Beijing,Beijing 100083,China;Division of Reactor Engineering Technology Research,China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]北京科技大学计算机与通信工程学院,北京100083 [2]中国原子能科学研究院反应堆工程技术研究部,北京102413

出　　处：《原子能科学技术》2020年第6期1108-1117,共10页Atomic Energy Science and Technology

基　　金：国家重点研发计划资助项目(2017YFB0202303)。

摘　　要：为实现全堆芯精确到每个通道的并行子通道模拟,本文提出一种基于子通道的并行任务划分和进程映射方法,可对全堆芯或单个组件进行计算任务划分,计算任务和进程的映射可灵活进行.该方法可根据计算机(群)的核数确定恰当的全堆芯子通道的任务划分方式,从而使全堆芯热工水力模拟可在单机、小型集群到超级计算机等不同环境运行.在天河二号超级计算机上进行全堆芯157组件、精确到每个真实流道、轴向划分为125层的稳态模拟,可使用4-6280核实现.使用4核时需约22h,使用6280核时需470s.引入混合编程实现方式后,使用6280核完成模拟需397s.In order to implement full-core and real channel-resolved parallel subchannel simulations,a subchannel-based parallel partitioning and mapping method was presen-ted.The method is able to partition either a full-core or a single assembly,and it maps the computation tasks and processes flexibly.The method chooses the appropriate parti-tioning method according to the core number of the computers/clusters used,which ena-bles the full-core thermal-hydraulic simulation to be carried out on various computing environments ranging from personal computers to supercomputers.A full-core and real-channel-resolved steady simulation,which analyzes 157 assemblies with each subchannel divided into 125 layers axially,is carried out on the Tianhe Ⅱ supercomputer using 4-6280 cores.The running time is about 22 h using 4 cores and the running time is 470 s using 6280 cores.By utilizing hybrid parallel computing,the running time on,6280 cores is reduced to 397 s.

关 键 词：热工水力 子通道模拟 并行计算 并行任务划分 MPI OPENMP 

分 类 号：TL339[核科学技术—核技术及应用]