中文摘要：

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 107particles 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.

英文摘要：

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.