Jamming probability of granular flow in 3D hopper with shallow columns: DEM simulations
| Autor: | Eung Soo Kim, Su-San Park |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Physics
Range (particle radiation) Particle number Flow (psychology) 0211 other engineering and technologies General Physics and Astronomy Jamming 02 engineering and technology Mechanics Granular material 01 natural sciences Discrete element method Mechanics of Materials 0103 physical sciences Particle General Materials Science Arch 010306 general physics 021101 geological & geomatics engineering |
| Zdroj: | Granular Matter. 22 |
| ISSN: | 1434-7636 1434-5021 |
| Popis: | We performed a numerical study of the jamming that stops the flow of granular material from a three-dimensional hopper discharging due to gravity. When the hopper outlet is not much larger than the particles, granular material clogs the hopper outlet due to the formation of an arch or dome. For a wide range of particle diameters, we obtained the size distribution of the “avalanche,” defined as the number of particles that fall before jamming. We repeated this process through a discrete element method model verified with a simple experiment. From these distributions, we determined the probability of the flow jamming before N particles pass through the hopper. As the ratio between the hopper outlet diameter and the particle diameter increases, the probability that an arch will block the outlet decreases. We show here that the probability of one particle passing through the hopper is not constant when there are not sufficient particles. Then, we propose a new model that can quantify changes in particle passing probability. Using this model, we derive the particle passing probability in a hopper with shallow columns and confirm that the probability of one particle passing through the hopper is closely related to the pressure acting on the bottom of the hopper. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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