The stable discharge of particles through the hopper plays a key role in many industrial applications. In order to investigate the discharge characteristics of binary particles in a rectangular hopper with an inclined bottom, the discrete element method (DEM) was used to simulate the discharge process. The accuracy of DEM was validated by comparing calculated and experimental values. The influences of geometric parameters (hopper width, orifice width, and hopper angle) and particle parameters (friction coefficient between particles, friction coefficient between particles and wall, fine particle mass fraction, and particle size ratio) on the discharge were studied. Some interesting results have been found that the effect of hopper width on discharge is minimal. The mass discharge rate is linearly related to the 3/2 power of orifice width, and it can be predicted by the modified Beverloo correlation which developed for a rectangular hopper with flat bottom. The mass discharge rate increases exponentially with the decrease in hopper angle, which is different from that of monosized particles. The mass discharge rate is more sensitive to low friction coefficient, and the friction coefficient between particles plays a leading role. Fine particles can promote the discharge process, and this effect is enhanced as particle size ratio increases.

通过料斗的稳定颗粒排放在许多工业应用中起着关键作用。为了研究具有倾斜底部的矩形漏斗中二元颗粒的排放特性，使用离散元方法（DEM）模拟了排放过程。通过比较计算值和实验值验证了DEM的准确性。研究了几何参数（料斗宽度，孔口宽度和料斗角度）和颗粒参数（颗粒间的摩擦系数，颗粒与壁之间的摩擦系数，细颗粒的质量分数和粒径比）对放电的影响。已经发现一些有趣的结果，料斗宽度对卸料的影响是最小的。质量排放率与孔口宽度的3/2幂成线性关系，可以通过改进的Beverloo相关性进行预测，该相关性针对具有平底的矩形漏斗而开发。卸料速率随料斗角的减小而呈指数增加，这与单一尺寸的颗粒不同。质量排放速率对低摩擦系数更敏感，并且颗粒之间的摩擦系数起主导作用。细颗粒可以促进放电过程，并且随着粒径比的增加，这种效果会增强。颗粒之间的摩擦系数起主导作用。细颗粒可以促进放电过程，并且随着粒径比的增加，这种效果会增强。颗粒之间的摩擦系数起主导作用。细颗粒可以促进放电过程，并且随着粒径比的增加，这种效果会增强。