标题： 长条形颗粒通过输送带在二维料仓中排出 显示英文标题

标题： Elongated particles discharged with a conveyor belt in a two-dimensional silo

摘要： 椭圆颗粒从二维料仓中通过传送带取出时的流动现象进行了实验分析。 传送带直接放置在料仓出口下方，它会降低流量，增加停滞区的大小，并且对相对速度波动有非常大的影响，随着传送带速度的降低，料仓内各处的速度波动都会显著增加。 换句话说，而不是缓慢但平稳的流动，传送带导致的流量减少会引起间歇性流动。 有趣的是，我们证明这种间歇性与颗粒在出口区域的取向有序性的强烈降低有关。 此外，我们观察到当颗粒通过传送带取出时，通过出口的颗粒的平均取向会发生变化，这一特性在较大的出口处更加明显。 显示英文摘要

摘要： The flow of elliptical particles out of a 2-dimensional silo when extracted with a conveyor belt is analyzed experimentally. The conveyor belt - placed directly below the silo outlet - reduces the flow rate, increases the size of the stagnant zone, and it has a very strong influence on the relative velocity fluctuations as they strongly increase everywhere in the silo with decreasing belt speed. In other words, instead of slower but smooth flow, flow reduction by belt leads to intermittent flow. Interestingly, we show that this intermittency correlates with a strong reduction of the orientational order of the particles at the orifice region. Moreover, we observe that the average orientation of the grains passing through the outlet is modified when they are extracted with the belt, a feature that becomes more evident for large orifices.