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

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Abstract

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.

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Correspondence to Jian-song Wu  (吴建松).

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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).

Biography: WU Jian-song (1985-), Male, Ph. D., Lecturer

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Wu, Js., Zhang, H., Yang, R. et al. Numerical modeling of dam-break flood through intricate city layouts including underground spaces using GPU-based SPH method. J Hydrodyn 25, 818–828 (2013). https://doi.org/10.1016/S1001-6058(13)60429-1

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  • DOI: https://doi.org/10.1016/S1001-6058(13)60429-1

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