Cfd-based Modelling of Bubble-particle Collision Efficiency with Mobile Bubble Surface in a Turbulent Environment

Flotation modelling to date appears to have concentrated either on macroscale processes or on ideal microscale processes – there has been no attempt to integrate detailed models at different scales. In this paper, bubble-particle collision efficiency with mobile bubble surfaces in a turbulent flow is investigated from a multiscale modelling viewpoint and a general methodology for modelling of turbulent bubble-particle collision efficiency with mobile surfaces is presented. An integrated CFD-based scheme is developed. The method can also be applied to nonNewtonian slurries. Example simulations and comparisons are carried out to illustrate the method. Turbulence effects on particle-bubble collision efficiency are systematically studied using a 3D ε − k turbulence model.