Kumar, Mayank and Mangadody, Narasimha and I, Govender
(2015)
Two Way Coupled CFD-DEM Model to Predict Tumbling Mill Dynamics.
In: Eleventh International Conference on CFD in the Minerals and Process Industries, 7-9 December 2015, Melbourne, Australia.
Abstract
The high energy inefficiency of tumbling mills has been the focus of much of modern day comminution research, Harsh milling conditions limit experimental measurement so the mill designers have to rely on empirical relations. The scope of the present work is to prepare a computational model that can accurately predict the complex multiphase dynamics of charge, air and slurry inside the mill using a coupling between computational fluid dynamics and discrete element method. The slurry air system is modelled using Volume of fluid (VOF) method and the charge motion is modelled by discrete element method. The phases are coupled using the interphase momentum exchange between the charge and the fluids at each fluid flow time step. The coupled model is compared with experimental results from the positron emitting particle tracking (PEPT) camera. The results show good qualitative agreement with equivalent PEPT findings. It is observed that out of the four modelling approaches investigated the Two-way coupled model gives the best agreement with the PEPT findings. The model can be useful in better understanding of the mill dynamics which can lead to more efficient design.
Actions (login required)
 |
View Item |
Altmetric
Altmetric