Simulations of two dimensional hopper flow
Simulations of two dimensional hopper flow
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二维料斗流动模拟
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
L. Kondic
中科院分区：
文献类型：
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作者：
L. Kondic
我们报告了对料斗外流动的离散元模拟。装置的几何形状以及材料参数直接取自唐和贝林格报告的实验(混沌21：041107,2011年；IFRPI-NSF合作：2D料斗数据摘要，2010年)。模拟考虑了弹性、摩擦、圆盘状颗粒的流动，当料斗壁的坡度和开口大小不同时，因此我们既可以考虑堵塞频繁发生的区域(小开口)，也可以考虑堵塞很少发生或根本不发生的区域(大开口)，以及料斗壁坡度的影响。我们讨论了堵塞事件的分布、料斗流出的质量流量以及材料参数对这些量的影响。此外，我们还考虑了料斗内的速度场和压力场，以及它们的波动。
We report on discrete element simulations of the flow out of a hopper. The geometry of the setup, as well as the material parameters, are taken directly from the experiments reported by Tang and Behringer (Chaos 21:041107, 2011; IFRPI-NSF collaboratory: 2D hopper data summary, 2010). The simulations consider flow of elastic, frictional, disk-like particles as the slope of the hopper walls and the size of the opening are varied, so that we can consider both the regime where jamming happens frequently (small openings) and where it occurs very rarely, or not at all (large openings), as well as the influence of the slope of hopper walls. We discuss the distribution of jamming events, the mass flux out of the hopper, and the influence of material parameters on these quantities. In addition, we consider velocity and pressure fields in the hopper, as well as their fluctuations.