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基于SPH方法的阶梯流数值模型
引用本文:吴建松,鲍凯,张辉,杨锐.基于SPH方法的阶梯流数值模型[J].清华大学学报(自然科学版),2011(6):802-808.
作者姓名:吴建松  鲍凯  张辉  杨锐
作者单位:清华大学工程物理系公共安全研究院;阿卜杜拉国王科技大学数学与计算机科学及工程学院计算输运现象实验室
基金项目:国家自然科学基金资助项目(70833003)
摘    要:针对阶梯流在实验研究方面的不足,为了更好地研究复杂阶梯流动力学规律,利用光滑粒子流体动力学方法(SPH)构建了阶梯流数值计算模型。该文模型对SPH方法的一种固壁边界处理方法进行了改进,改进的边界处理方法能对固壁边界施加的斥力进行动态修正从而减少边界扰动,还引入了动态加入水粒子的水泵模型来模拟阶梯流实验中的水泵注水过程。以验证模型可靠性,基于建立的模型对Ishigaki实验场景进行了模拟分析。结果表明:定性上,模拟水流呈现出较好的阶梯流流态;定量上,模拟结果与Ishigaki实验数据整体上比较吻合。

关 键 词:阶梯流  光滑粒子流体动力学(SPH)  边界斥力法  水泵

Numerical model of staircase flow based on the SPH method
WU Jiansong,BAO Kai,ZHANG Hui,YANG Rui.Numerical model of staircase flow based on the SPH method[J].Journal of Tsinghua University(Science and Technology),2011(6):802-808.
Authors:WU Jiansong  BAO Kai  ZHANG Hui  YANG Rui
Institution:1 (1.Institute of Public Safety Research,Department of Engineering Physics,Tsinghua University,Beijing 100084,China; 2.Computational Transport Phenomena Laboratory,Division of Mathematics and Computer Science and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900,Saudi Arabia)
Abstract:Experimental studies of flow fields over staircase geometrics are difficult due to the complex geometry.This paper presents a numerical model based on smoothed particle hydrodynamics(SPH) to investigate the hydrodynamics of staircase flows.The model was an improved fixed wall boundary treatment to automatically adjust the repulsive force exerted on the water particles by the fixed solid boundary particles.A pump model was developed to simulate the process of adding water in real experiments.Simulations of previous staircase flow experiments qualitatively reproduce the staircase flow regimes with quantitative agreement with the overall flow rate from the experimental data.
Keywords:staircase flow  smoothed particle hydrodynamics(SPH)  repulsive boundary method  pump
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