Numerical modeling of dam-break flood through intricate city layouts including underground spaces using GPU-based SPH method  

作　　者：吴建松 张辉 杨锐 DALRYMPLE Robert A. HéRAULT Alexis 

机构地区：[1]Faculty of Resources and Safety Engineering,China University of Mining and Technology [2]Department of Engineering Physics,Tsinghua University [3]Department of Civil Engineering,Johns Hopkins University [4]Conservatoire National des Arts et Métier

出　　处：《Journal of Hydrodynamics》2013年第6期818-828,共11页水动力学研究与进展B辑（英文版）

基　　金：Project supported by the National Basic Research Development Program of China(973 Program,No.2012CB719705);the National Natural Science Foundation of China(Grant Nos.91024032,70833003)

摘　　要：This paper applies the meshfree Smoothed Particle Hydrodynamics （SPH） method with Graphical Processing Unit （GPU） parallel computing technique to investigate the highly complex 3-D dam-break flow in urban areas including underground spaces. Taking the advantage of GPUs parallel computing techniques, simulations involving more than 107 particles can be achieved. We use a virtual geometric plane boundary to handle the outermost solid wall in order to save considerable video card memory for the GPU computing. To evaluate the accuracy of the new GPU-based SPH model, qualitative and quantitative comparison to a real flooding experiment is performed and the results of a numerical model based on Shallow Water Equations （SWEs） is given with good accuracy. With the new GPU-based SPH model, the effects of the building layouts and underground spaces on the propagation of dambreak flood through an intricate city layout are examined.This paper applies the meshfree Smoothed Particle Hydrodynamics （SPH） method with Graphical Processing Unit （GPU） parallel computing technique to investigate the highly complex 3-D dam-break flow in urban areas including underground spaces. Taking the advantage of GPUs parallel computing techniques, simulations involving more than 107 particles can be achieved. We use a virtual geometric plane boundary to handle the outermost solid wall in order to save considerable video card memory for the GPU computing. To evaluate the accuracy of the new GPU-based SPH model, qualitative and quantitative comparison to a real flooding experiment is performed and the results of a numerical model based on Shallow Water Equations （SWEs） is given with good accuracy. With the new GPU-based SPH model, the effects of the building layouts and underground spaces on the propagation of dambreak flood through an intricate city layout are examined.

关 键 词：DAM-BREAK FLOOD city layouts Graphical Proceeding Unit （GPU） Smoothed Particle Hydrodynamics （SPH） method 

分 类 号：TV122.4[水利工程—水文学及水资源]