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Investigating the flow of rod-like particles in a horizontal rotating drum using DEM simulation

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Abstract

Understanding the flow and mixing of rod-like particles is fundamental because of the widespread use of rods in the process industry. In this paper, discrete element method is used to investigate the flow and mixing of rod-like particles in a horizontal rotating drum, with rod-like particles being modeled by super-ellipsoids. The influence of the aspect ratio of the rod and the rotation speed of the drum on the flow of rod-like particles is studied. The investigation of spherical particles is also included in this paper to reveal the differences between rod-like and spherical particles. The simulation results show that the flow of rods is more intermittent than that of spheres and that there is more intermittent flow for rod-like particles with larger aspect ratios. Both the aspect ratio of the rod and the rotation speed of the drum considerably influence particle mixing. The mixing rate, as quantified by the slope of the variation in the mixing index with respect to drum revolution, increases as rotation speed and aspect ratio decrease. The study of particle orientation indicates that rod-like particles have a preferred orientation during rotation of the drum: the major axis of the rod inclines to be parallel to the end plate of the drum.

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Acknowledgements

This research is financially supported by the National Natural Science Foundation of China (NSFC, Grant Nos. 21476193, 51741608).

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  1. Institute of Process Equipment, College of Energy Engineering, Zhejiang University, Hangzhou, 310027, China

    Huaqing Ma & Yongzhi Zhao

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  1. Huaqing Ma
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Ma, H., Zhao, Y. Investigating the flow of rod-like particles in a horizontal rotating drum using DEM simulation. Granular Matter 20, 41 (2018). https://doi.org/10.1007/s10035-018-0823-0

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