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Discharge Characteristics of Different Shaped Particles from an Inclined Bottom Rectangular Hopper
Arabian Journal for Science and Engineering ( IF 2.9 ) Pub Date : 2021-04-12 , DOI: 10.1007/s13369-021-05584-w
Zhongliang Zhang , Yongqi Liu , Bin Zheng , Peng Sun , Ruiyang Li

In order to further explore the discharge characteristics of different shaped particles from the inclined bottom hopper, the discharge of four shaped particles from an inclined bottom rectangular hopper was studied based on the discrete element method (DEM). Non-spherical particles were established based on the multi-spheres method. The effects of geometric parameters, particle properties, and interaction parameters on discharge were investigated. Some interesting results have been found that regular spherical particles are more easily discharged from the hopper, and the time required to empty the hopper is the shortest. The influence of particle shape on discharge takes precedence over that of solid fraction. Both the critical angle (55°) and the correlation between the 2/3 power of the mass discharge rate and the orifice width are independent of the particle shape. Blockage occurs as the angle and/or the ratio of particle size to orifice width increases. The dihedral angle is the key factor affecting the blockage. Compared with spherical particles, non-spherical particles are more prone to blockage and have stronger blockage strength.



中文翻译:

倾斜底部矩形漏斗中不同形状颗粒的放电特性

为了进一步探究不同形状颗粒从倾斜底部漏斗的排放特性,基于离散元方法(DEM),研究了四种形状颗粒从倾斜底部矩形漏斗的排放。基于多球法建立了非球形粒子。研究了几何参数,颗粒性质和相互作用参数对放电的影响。已经发现一些有趣的结果,规则的球形颗粒更容易从料斗中排出,并且清空料斗所需的时间最短。颗粒形状对放电的影响优先于固体部分的影响。临界角(55°)以及质量释放速率的2/3次方与孔口宽度之间的相关性均与颗粒形状无关。当角度和/或粒径与孔口宽度的比率增加时,发生堵塞。二面角是影响堵塞的关键因素。与球形颗粒相比,非球形颗粒更易于阻塞并且具有更强的阻塞强度。

更新日期:2021-04-12
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