Numerical modeling of dam-break flood through intricate city layouts including underground spaces using GPU-based SPH method |
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| Authors: | Jian-song WU Hui ZHANG Rui YANG Robert A DALRYMPLE Alexis HÉRAULT |
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| Affiliation: | [1]Faculty of Resources and Safety Engineering, China University of Mining and Technology, Beijing 100083, China [2]Department of Engineering Physics, Tsinghua University, Beijing 100084, China [3]Department of Civil Engineering, Johns Hopkins University, Baltimore, MD, USAHI~RAULT Alexis |
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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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| Keywords: | dam-break flood city layouts Graphical Proceeding Unit （GPU） Smoothed Particle Hydrodynamics （SPH） method |
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