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Numerical simulation for the initial state of avalanche in polydisperse particle systems |
Ren Han(韩韧), Ting Li(李亭), Zhipeng Chi(迟志鹏), Hui Yang(杨晖), and Ran Li(李然)† |
School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China |
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Abstract Numerical simulation is employed to investigate the initial state of avalanche in polydisperse particle systems. Nucleation and propagation processes are illustrated for pentadisperse and triadisperse particle systems, respectively. In these processes, particles involved in the avalanche grow slowly in the early stage and explosively in the later stage, which is clearly different from the continuous and steady growth trend in the monodisperse system. By examining the avalanche propagation, the number growth of particles involved in the avalanche and the slope of the number growth, the initial state can be divided into three stages: T1 (nucleation stage), T2 (propagation stage), T3 (overall avalanche stage). We focus on the characteristics of the avalanche in the T2 stage, and find that propagation distances increase almost linearly in both axial and radial directions in polydisperse systems. We also consider the distribution characteristics of the average coordination number and average velocity for the moving particles. The results support that the polydisperse particle systems are more stable in the T2 stage.
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Received: 13 October 2023
Revised: 21 November 2023
Accepted manuscript online: 01 December 2023
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PACS:
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45.70.Ht
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(Avalanches)
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45.70.Mg
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(Granular flow: mixing, segregation and stratification)
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45.70.-n
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(Granular systems)
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Fund: Project supported by the Qingdao National Laboratory for Marine Science and Technology (Grant No. 2015ASKJ01) and the National Natural Science Foundation of China (Grant Nos. 11972212, 12072200, and 12002213). |
Corresponding Authors:
Ran Li
E-mail: ran89@usst.edu.cn
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Cite this article:
Ren Han(韩韧), Ting Li(李亭), Zhipeng Chi(迟志鹏), Hui Yang(杨晖), and Ran Li(李然) Numerical simulation for the initial state of avalanche in polydisperse particle systems 2024 Chin. Phys. B 33 024501
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