Rapid flow of dry granular materials down inclined chutes impinging on rigid walls
Rapid flow of dry granular materials down inclined chutes impinging on rigid walls
复制标题
DOI：
10.1063/1.2726885
复制
发表时间：
2007-05
影响因子：
4.6
通讯作者：
S. Pudasaini;K. Hutter;S. Hsiau;Shih-Chang Tai;Yongqi Wang;R. Katzenbach
中科院分区：
文献类型：
--
作者：
S. Pudasaini;K. Hutter;S. Hsiau;Shih-Chang Tai;Yongqi Wang;R. Katzenbach
我们进行了实验室实验的干颗粒斜槽流撞击的障碍墙。泄槽由一个10cm宽的矩形槽组成，相对于水平方向倾斜50°，向下2m突然变成一个相同宽度的水平槽。分别通过与斜槽宽度相同的门和6 cm高的间隙释放15 l石英碎片。对两种挡土墙位置进行了试验，（i）出口门下方2m，垂直于斜槽，（ii）进入水平出口0.63m，然后垂直定向。通过打开筒仓的闸门，颗粒状物料被连续释放。然后，物料沿溜槽迅速向下移动，并撞击在阻挡壁上。这导致流动状态的突然变化，从快速移动的超临界薄层到具有可变厚度和由材料的典型休止角决定的表面的停滞厚堆。我们用粒子图像测速仪...
We performed laboratory experiments of dry granular chute flows impinging an obstructing wall. The chute consists of a 10cm wide rectangular channel, inclined by 50° relative to the horizontal, which, 2m downslope abruptly changes into a horizontal channel of the same width. 15l of quartz chips are released through a gate with the same width as the chute and a gap of 6cm height, respectively. Experiments are conducted for two positions of the obstructing wall, (i) 2m below the exit gate and perpendicular to the inclined chute, and (ii) 0.63m into the horizontal runout and then vertically oriented. Granular material is continuously released by opening the shutter of the silo. The material then moves rapidly down the chute and impinges on the obstructing wall. This leads to a sudden change in the flow regime from a fast moving supercritical thin layer to a stagnant thick heap with variable thickness and a surface dictated by the angle of repose typical for the material. We conducted particle image velocimet...