防风网后的颗粒受力分析  

Force analysis of particles after porous fence

作　　者：陈光辉[1] 白学花 李剑[1] 李建隆[1] 

机构地区：[1]青岛科技大学化工学院,山东青岛266042

出　　处：《计算机与应用化学》2015年第10期1247-1250,共4页Computers and Applied Chemistry

基　　金：山东省自然科学基金资助(ZR2011BQ006)

摘　　要：防风网的设置不仅能够降低沙堆表面的风速,还能降低沙堆表面的气流湍动强度,颗粒的运动受力与防风网的抑尘机理密切相关。本文利用CFD商用软件Fluent软件包里的离散相模型,对防风网后的料堆进行扬尘模拟,追踪颗粒运动轨迹,分析颗粒的运动受力机制。分析粒径0.1 mm的颗粒运动得出结论:颗粒运动过程中的主导力为曳力和颗粒自身重力;但在颗粒起跳的初期,Saffman升力对颗粒进入跃移层具有决定性作用;Magnus力对颗粒起动影响很小,仅为重力的1%左右。The setting of the porous fence not only can reduce the surface wind, also can reduce the strength of turbulent airflow on the surface of the sand. On the surface of the sand particles starting mechanism is closely related to dust suppression mechanism of the porous fence. In this paper, by using the commercial CFD software Fluent software package of the discrete phase model, to simulate the stock pile after the windproof net dust, tracking particle trajectory, analysis starting force mechanism of particles. Analysis of particle size of 0.1 mm particle movement came to the conclusion： in particle movement the leading force was drag force and particles gravity; in the early stages of the particle take off, Saffman force plays an important role in the process of particles into the saltation layer; Magnus force is just 1% of the gravity.

关 键 词：防风网 颗粒运动 受力分析 数值模拟 

分 类 号：TQ015.9[化学工程]