面向众核处理器的水动力学CFD并行计算探索  

Multi-Core Processor Oriented Parallel Computation for CFD in Hydrodynamics

作　　者：张亚英 吴乘胜[1] 王建春[1] 刘宏斌 ZHANG Ya-ying;WU Cheng-sheng;WANG Jian-chun;LIU Hong-bin(China Ship Scientifi c Research Center,Wuxi 214082,China;National Supercomputing Center in Wuxi,Wuxi 214072,China)

机构地区：[1]中国船舶科学研究中心,无锡214082 [2]国家超级计算无锡中心,无锡214072

出　　处：《船舶》2021年第4期15-23,共9页Ship & Boat

基　　金：水动力预研项目(编号:50907070201)。

摘　　要：异构众核已成为超级计算机架构的发展趋势,而如何有效利用众核处理器的计算能力,是当前CFD界的一项重大挑战。该文面向异构众核处理器,基于自主开发代码,开展水动力学CFD并行计算探索研究。首先分析异构众核给CFD并行计算带来的挑战;针对国产申威26010处理器,对SIMPLE算法和人工压缩算法设计众核并行方案,并通过二维方腔驱动流算例,对计算结果和众核加速效果进行验证和测试;然后,针对SIMPLE算法热点分散的特点,采用循环融合的方法对其计算流程进行优化。研究结果表明:SIMPLE算法和人工压缩算法分别获得11倍和24倍的最高加速。该项研究工作,初步展现了众核处理器在水动力学CFD并行计算中的应用潜力。Heterogeneous multi-core technology has become the developing trend of the supercomputers architecture.The effective utilization of the computing power of multi-core processor is a grand challenge in the current CFD industry.The parallel computation for the CFD in hydrodynamics has been explored for heterogeneous multi-core processor based on self-developed code.Firstly,the challenges of the heterogeneous multi-core technology to the CFD parallel computation are analyzed.Secondly.The multi-core parallel computing scheme is designed for SIMPLE algorithm and pseudo-compressible algorithm for SIMPLE and the pseudocompressible algorithms aiming at the SW26010 processor.The two-dimensional square cavity driven flow are calculated to verify and validate the calculation results and the many-core acceleration effect.Then,the calculation procedure is optimized by using the cyclic fusion method in view of the scattered hot spots of SIMPLE algorithm.The results show that the SIMPLE algorithm and Pseudo-compressible algorithm can achieve the maximum acceleration of 11 times and 24 times,respectively.It preliminarily presents the application potential of the multi-core processor in the parallel computation for the CFD in hydrodynamics.

关 键 词：众核处理器 并行计算 不可压流动 SIMPLE算法 人工压缩算法 

分 类 号：U661.1[交通运输工程—船舶及航道工程]