Shape dependence of resistance force exerted on an obstacle placed in a gravity-driven granular silo flow
Shape dependence of resistance force exerted on an obstacle placed in a gravity-driven granular silo flow
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施加在重力驱动粒状料仓流中的障碍物上的阻力的形状依赖性
DOI：
10.1002/aic.16205
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
and K. Endo
中科院分区：
文献类型：
--
作者：
H. Katsuragi;K. Anki Reddy;and K. Endo
通过实验和数值模拟研究了重力驱动下的料仓筒仓流动中障碍物所受的阻力。在二维颗粒筒仓中，在出口上方放置一个障碍物。通过调节出口宽度和障碍物的位置，可以控制出口流量。在颗粒排放过程中，测量流速和施加在障碍物上的阻力。使用所获得的数据，表征颗粒流中的力平衡的无量纲数由排出流量与阻力-力减小率之间的关系定义。无量纲数与流速无关。相反，我们发现了无量纲数的弱形状依赖性。这种趋势是颗粒筒仓流动阻力的一个独特特征。它表征了颗粒筒仓流动中与障碍物相互作用的有效流动宽度。© 2018美国化学工程师学会AIChE J，64：3849-3856，2018
Resistance force exerted on an obstacle in a gravity‐driven slow granular silo flow is studied by experiments and numerical simulations. In a two‐dimensional granular silo, an obstacle is placed just above the exit. Then, steady discharge flow is made and its flow rate can be controlled by the width of exit and the position of obstacle. During the discharge of particles, flow rate and resistance force exerting on the obstacle are measured. Using the obtained data, a dimensionless number characterizing the force balance in granular flow is defined by the relation between the discharge flow rate and resistance‐force decreasing rate. The dimensionless number is independent of flow rate. Rather, we find the weak shape dependence of the dimensionless number. This tendency is a unique feature for the resistance force in granular silo flow. It characterizes the effective flow width interacting with the obstacle in granular silo flow. © 2018 American Institute of Chemical EngineersAIChE J, 64: 3849–3856, 2018
DOI：
10.1209/0295-5075/93/28008
发表时间：
2010-12
期刊：
EPL (Europhysics Letters)
影响因子：
--
作者：
J. Royer;B. Conyers;E. Corwin;P. Eng;H. Jaeger
通讯作者：
J. Royer;B. Conyers;E. Corwin;P. Eng;H. Jaeger
影响因子：
2.9
作者：
Humphrey, W;Dalke, A;Schulten, K
通讯作者：
Schulten, K