首页|基于GPU加速的溃坝洪水演进模拟研究

基于GPU加速的溃坝洪水演进模拟研究

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溃坝洪水演进与淹没范围快速模拟,对指导抢险救灾至关重要.为此,引入 GPU 加速技术,构建了一套高效高分辨率溃坝数值模型,与经典三驼峰溃坝试验对比发现,模拟结果与试验结果非常吻合,并利用该模型模拟了典型溃坝洪水演进及溃口流场、溃后水位变化情况.结果表明,模型能较好地模拟溃坝洪水演进,较好捕捉溃口发展过程及泥沙输移.t=200 s 时溃决流量出现小峰值 4 m3/s,t=450 s 时,溃决流量出现最大峰值 13.8 m3/s;随着下泄流量增大,溃口加速侵蚀和冲刷并逐渐连通,溃口由 0.21 m 扩大至 0.40 m.GPU加速比约为CPU的 10.33～13.75 倍,且网格数越多,加速效果越明显.
Simulation of Dam-break Flood Routing Based on GPU Acceleration
Rapid simulation of dam-break flood evolution and inundation range is very important for guiding emergen-cy rescue and disaster relief.Therefore,GPU acceleration technology was introduced to construct a set of high-efficiency and high-resolution dam-break numerical model.Compared with the classical three-hump dam-break test,it is found that the simulation results are in good agreement with the experimental results.The results show that the model can better simulate the evolution of dam-break flood,and better capture the development process of dam-break and sediment trans-port.When t = 200 s,the outburst flow has a small peak value of 4 m3/s,and when t = 450 s,the maximum peak val-ue of 13.8 m3/s appears.With the increase of discharge flow,the breach accelerated erosion and erosion and gradually connected,and the breach expanded from 0.21 m to 0.40 m.The GPU acceleration ratio is about 10.33-13.75 times of CPU,and the more the number of grids,the more obvious the acceleration effect is.

dam breakhydrodynamic modelflood evolutionGPU acceleration

康永德、李伟、许尔文、任小凤、王荣新、闫春鸣、敬文茂

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兰州理工大学能源与动力工程学院, 甘肃 兰州 730050

甘肃省祁连山水源涵养林研究院, 甘肃 张掖 734000

溃坝 水动力模型 洪水演进 GPU加速

甘肃省青年科技计划项目国家自然科学基金联合基金项目甘肃省自然科学基金青年基金项目中科院地球环境研究所黄土与第四纪地质国家重点实验室开放基金内蒙古阴山北麓草原生态水文国家野外科学观测研究站开放研究基金(中国水利水电科学研究院)

20JR10RG824U21A2046822JR5RA282SKLLQG2237YSS202304

2024

10.20040/j.cnki.1000-7709.2024.20231531

水电能源科学
中国水力发电工程学会 华中科技大学 武汉国测三联水电设备有限公司

水电能源科学

CSTPCD北大核心
影响因子：0.525
ISSN：1000-7709
年,卷(期)：2024.42(3)
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