Numerical simulation of particle velocity and coordination number under the slumping regime in a rotating drum
2021
Han, Ren | Xin, Yuyun | Wang, Zhi | Li, Ran | Yang, Hui | Chen, Quan
In this paper, a numerical simulation is applied to statistic the particle velocity and coordination number of the surface layer under the slumping regime in a rotating drum. We find that the particle velocity distribution under different coordination numbers in the avalanche always satisfies Maxwell distribution and exponential distribution. This indicated that the distribution of coordination number is the main factor causing uneven avalanche. Furthermore, the mathematical model of particle velocity and coordination number is established, and a novel method for calculating the kinetic energy of particle system is proposed. It is observed that the maximum kinetic energy of particles in different regions during the uneven avalanche is positively correlated with the avalanche duration. These results reveal the particle flow regular in the rotating drum, which provides reference data for improving the control technology of particle material flow and the heat transfer in industry.
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