基于GPU加速的MPS方法模拟三维急弯河道溃坝流动  

Numerical simulation of three-dimensional dam break flow in channel with sharp bend based on GPU accelerated MPS method

作　　者：鲁逸豪 赵伟文 万德成[1] LU Yi-hao;ZHAO Wei-wen;WAN De-cheng(Computational Marine Hydrodynamics Lab(CMHL),School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学船海计算水动力学研究中心(CMHL)船舶海洋与建筑工程学院,上海200240

出　　处：《水动力学研究与进展（A辑）》2021年第2期237-243,共7页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金项目(51879159);国家重点研发计划项目(2019YFB1704200,2019YFC0312400);长江学者奖励计划(T2014099)。

摘　　要：溃坝流动是一种灾害性的复杂流动现象,该文将GPU加速技术与MPS方法相结合,采用该课题组自主开发的MPSGPU-SJTU求解器对三维急弯细长河道中的溃坝流动问题进行了数值模拟。监测河道中轴线处自由液面水位高度与速度场分布情况表明,数值模拟结果与实验结果吻合较好。此外,该文对比了CPU与GPU的计算时间,验证了采用GPU并行技术可以大幅提高MPS方法计算效率。还改变了初始流场的水位高度,计算三种不同工况下溃坝流动过程,同时在河道壁面布置压力监测点预报河道壁面所受的砰击压力,评估溃坝流动的危害。Dam-breaking is a disastrous phenomenon with complex flow.In this paper,a numerical simulation of three-dimensional dam break flow in slender channel with a 90 degree bend is studied based on the in-house MPSGPU-SJTU solver.The free surface water level along the central axis and velocity field are in good agreement with the experimental data.Compared with the calculation time of CPU,the efficiency is highly improved with the help of GPU parallel calculation.Moreover,pressures on side walls of the channel are measured in cases of different initial water levels to evaluate the damage of dam-breaking.

关 键 词：急弯河道溃坝流动 MPS方法 GPU加速技术 MPSGPU-SJTU求解器 

分 类 号：O357[理学—流体力学]