柱状颗粒在线性剪切流场中运动的数值模拟研究  

NUMERICAL SIMULATION RESEARCH ON THE MOVEMENT OF A CYLINDRICAL PARTICLE IN A LINEAR SHEAR FLOW

作　　者：郑乐梅 王彦入 沈家鑫 尹招琴[1] 包福兵 ZHENG Lemei;WANG Yanru;SHEN Jiaxin;YIN Zhaoqin;BAO Fubing(Institute of Fluid Measurement and Simulation,China Jiliang University,Hangzhou 310018,China)

机构地区：[1]中国计量大学流体检测与仿真研究所,杭州310018

出　　处：《力学与实践》2021年第5期734-739,共6页Mechanics in Engineering

基　　金：国家重点研发项目(2017YFB0603701);国家自然科学基金(11972335,11972334)项目资助。

摘　　要：柱状颗粒是自然界和工业过程中一种普遍的颗粒形状,它在流场中的运动与球状颗粒有显著区别。论文基于直接力浸入边界法数值模拟了柱状颗粒在线性剪切流中的运动;分析了柱状颗粒周围流场参数分布,获得了作用在颗粒上的力矩变化,明确了由流体曳力和颗粒惯性力相互作用导致颗粒运动的速度和角速度的变化规律,同时考虑了颗粒雷诺数对颗粒运动的影响。Cylindrical particles are common in nature and industrial process, and its movement in flow field is significantly different from that of spherical particles. In this paper, the direct forcing immersed boundary method was used to numerically simulate the motion of cylindrical particles in a linear shear flow. The flow field around the cylindrical particle is investigated in detail, and the moment acting on the particle is calculated. It reveals the rule of the moving particle caused by the interaction of the fluid drag force and the particle inertia force. Furthermore, the influence of the Reynolds number on the particle motion was also investigated.

关 键 词：柱状颗粒 线性剪切流 直接力浸入边界法 

分 类 号：O359[理学—流体力学]