This work simulates the particle flow in a rotating drum based on the discrete element method. By varying the drum rotation speeds, different flow regimes are generated and the flow properties, such as angle of repose, flow density and particle collision, were analysed. It is shown that the dynamic angle of repose has little change in the rolling regime but has a jump in the cascading and cataracting regimes. The flow density distribution shows a strong peak at the position corresponding to the random loose packing, but becomes more dilated with the increasing drum rotation speed. Both the collision energy and collision frequency increase with the rotation speed. The collision energy distributions have similar profiles at different rotation speeds, indicating there may exist a scaling factor against which all distributions can be plotted in one curve. The collision frequency shows a linear increase with the rotation speed but the collision frequency of the particle-wall collision increases much faster than that of the particle-particle. The results obtained from the simulations can be used to identify a quantitative index for characterising different regimes.
|Publication status||Published - 1 Dec 2007|
|Event||9th International Conference on Bulk Materials Storage, Handling and Transportation, ICBMH 2007 - Newcastle, Australia|
Duration: 9 Oct 2007 → 11 Oct 2007
|Conference||9th International Conference on Bulk Materials Storage, Handling and Transportation, ICBMH 2007|
|Period||9/10/07 → 11/10/07|