Mechanism of size segregation of particles in filling a hopper
Mechanism of size segregation of particles in filling a hopper
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填充料斗时颗粒尺寸分离的机制
DOI：
10.1021/i260043a008
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发表时间：
1972
期刊：
影响因子：
--
通讯作者：
Tatsuo Tanaka
中科院分区：
文献类型：
--
作者：
K. Shinohara;K. Shoji;Tatsuo Tanaka
基于筛分或渗流模型，从理论上分析了料斗充填过程中颗粒尺寸偏析的机理。根据该模型，当不同大小的混合颗粒在料斗中心进料并沿固体堆面向下流动时，混合物中的较小颗粒在流动过程中穿过较大颗粒的空间，然后被堆积在静止的大颗粒空间中。通过分析和实验发现，随着大颗粒在进料中的比例变小，沿堆面的流动距离变大，颗粒的进料速度变大，形成了一个V形区域，其中包含了由于偏析而产生的小颗粒。
Mechanism of size segregation of particles in filling a hopper was theoretically analyzed on the basis of a screening or percolation model. According to the model, when mixed particlesof different size are fed in the center of the hopper and flow down on solids heap surface, smaller particles withinthe mixture pass through interspaces of larger particlesduring flow and then are packed in interspaces of stationary large particles of the heap surface. By the analysis and experiments, a V-shaped zone, where smaller particles are contained as a result of segregation, was found to expand with smaller fraction of large particles in the feed, longer distance of flow along the heap surface, and larger feed rate of particles.