【摘 要】
：
The dynamics of granular material discharging from a cuboid but thin hopper, including the hopper fl ow and granular jet, are investigated via discrete element
【机 构】
：
Institute of Modern Physics, Chinese Academy of Sciences (CAS), Lanzhou 730000, China;University of
论文部分内容阅读
The dynamics of granular material discharging from a cuboid but thin hopper, including the hopper fl ow and granular jet, are investigated via discrete element method (DEM) simulations. The slot width is varied to study its infl uence on the fl ow. It is found the fl ow in the cuboid hopper has similarity with the fl ow in two-dimensional (2D) hopper. When the slot width is large, the fl owrate is higher than the predicted value from Beverloo’s law and the velocity distribution is not Gaussian-like. For granular jet, there is a transition with varying slot width. For large slot width, there is a dense core in the jet and the variations of velocities and density are relatively small. Finally, the availability of continuum model is assessed and the results show that the performance with large slot width is better than that with small slot width.
其他文献
Two-dimensional (2D) materials, such as graphene, transition metal dichalcogenides (TMDs), black phosphorus (BP), and related derivatives, have attracted great
大量的实验模拟计算需要知道天然气水合物的形成条件。可利用方程式来确定天然气水合物形成条件的数据。目前这种模式和等式的准确性取决于实验数据和理论值的准确性,二者相
全媒体时代的到来,让社交媒体迎来更为广泛的应用,从而对处于社会化关键阶段的大学生群体产生更为深层和复杂的影响.本文选取吉林省高校大学生作为研究对象,从大学生群体对社
We have developed Macadam’s theory to deal with RGB laser display, which can well describe the color gamut display system varying with the laser bandwidth. By
High-performance photodetectors are expected to open up revolutionary opportunities in many application fields, such as environment monitoring, military, optica
The hydrodynamic interactions (HIs) in colloidal monolayers are strongly influenced by the boundary conditions and can be directly described in terms of the cro
In complex networks, identifying influential spreader is of great significance for improving the reliability of networks and ensuring the safe and effective ope
Controlling the phase of light in magnetoplasmonic structures is receiving increasing attention because of its already shown capability in ultrasensitive and la
随着媒介生态环境发生的深刻变革,主流媒体作为信息传播的中流砥柱,在当前复杂的舆论环境中不断开拓创新,一改之前的传播路径和节目样态.《主播说联播》栏目的 推出,迎合了时
本研究采用ISSR与SRAP技术对中国热带农业科学院南亚热带作物研究所收集保存的123份澳洲坚果种质进行分析，以期从DNA水平上评价目前所收集保存的澳洲坚果资源的多样性，为我国澳