一种全堆芯精确到每个通道的子通道并行模拟方法

王先梦; 赵民富; 吕玉凤; 蔡银宇; 储根深; 卢旭; 王昭顺; 郭苏萱; 周志锋; 胡长军; 杨文

doi:10.7538/yzk.2019.youxian.0436

一种全堆芯精确到每个通道的子通道并行模拟方法

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

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- 刊出日期: 2020-06-19

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

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

摘要

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4～6 280核实现。使用4核时需约22 h，使用6 280核时需470 s。引入混合编程实现方式后，使用6 280核完成模拟需397 s。
- 热工水力 ,
- 子通道模拟 ,
- 并行计算 ,
- 并行任务划分 ,
- MPI ,
- OpenMP
Abstract: In order to implement full-core and real-channel-resolved parallel subchannel simulations, a subchannel-based parallel partitioning and mapping method was presented. 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 partitioning method according to the core number of the computers/clusters used, which enables 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 4-6 280 cores. The running time is about 22 h using 4 cores and the running time is 470 s using 6 280 cores. By utilizing hybrid parallel computing, the running time on 6 280 cores is reduced to 397 s.
- thermal-hydraulics ,
- subchannel simulation ,
- parallel computation ,
- parallel partitioning ,
- MPI ,
- OpenMP

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参考文献(24)

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一种全堆芯精确到每个通道的子通道并行模拟方法

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

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