应用基于GPU的SPH方法模拟二维楔形体入水砰击问题  

Application of the GPU-based SPH method to the simulation of water entry of 2D wedge bodies

作　　者：王珏[1] 邱流潮[1] 

机构地区：[1]中国农业大学应用力学系,北京100083

出　　处：《计算力学学报》2013年第S1期174-177,共4页Chinese Journal of Computational Mechanics

基　　金：国家自然科学基金(11172321);中央高校基本科研业务费专项(2011JS047)资助项目

摘　　要：光滑粒子流体动力学(SPH)法是一种无网格的拉格朗日数值方法,广泛应用于计算流体领域模拟复杂自由表面流问题.SPH方法的主要缺点就是计算量过大,而基于GPU的并行计算方法可使SPH计算得到有效加速.本文应用基于GPU的SPH并行计算方法研究了二维楔形体的入水砰击问题。数值计算结果与文献中对应的解析解比较一致,验证了基于GPU的SPH方法的精度和可靠性.仿真结果同时显示基于GPU的并行计算方法可使SPH计算速度得到显著提高.As a mesh-free Lagrangian numerical method,Smoothed Particle Hydrodynamics(SPH) is commonly used in Computational Fluid Dynamics(CFD) to simulate complex free-surface flows.However,the main drawback of the SPH method is too computationally intensive.GPUs appear to be an accessible alternative to accelerate SPH models.In this paper,the water entry of a 2D wedge boy was simulated using the GPU-based SPH Method.The results show that the numerical results are in agreement with analytical solutions in the literature and thus the reliability and the accuracy of the GPU-based SPH Method were verified.It also indicates the parallelisation using GPUs exhibit a considerable speedup.

关 键 词：光滑粒子流体动力学 GPU 楔形体入水 砰击问题 数值模拟 

分 类 号：O352[理学—流体力学]