Using SPH one-way coupled to DEM to model wet industrial banana screens

A review of state-of-the-art processing operations in coal preparation

“…Banana screens can be installed in double or triple deck configurations with dimensions up to 10 Â 24 ft. Polyurethane panels are a common deck material, given superior wear characteristics; however, traditional punch plates remain common [13]. Several recent studies have used Discrete Element Modeling (DEM) to analyze the particle-level interactions occurring on banana screens [14,15].…”

Prediction of coupled particle and fluid flows using DEM and SPH

“…In our previous modelling of multiphase flow in mills and screens we have used a 1-way coupling based on the assumption that the coarse solids dominate the flows and that the fluid flows predominantly through the pore space of fairly densely packed larger particles Morrison, 2011, 2012;Sinnott et al, 2011;and Fernandez et al, 2011).…”

“…The question of the required resolution is also similar to the question of how much resolution is required to adequately resolve flow through the regular array of openings in a screen or the grate in a mill. Fernandez et al (2011) examined this using SPH and found that ideally ten particles across an opening is required but sometimes as few as 3-4 particles could be adequate. For lower resolution, there is significant unphysical numerical resistance to fluid particles entering and passing through small openings.…”

“…This was subsequently extended to three dimensions and applied to the prediction of slurry flow in a tower mill by Sinnott et al (2011). It has also been used to predict slurry flow on a double deck vibrating banana screen (Fernandez et al, 2011). The method was also recently applied to the full Hardinge pilot mill enabling prediction of the free fluid flow within a SAG mill grinding chamber, flow through the grate and discharge flow along the pulp lifters was demonstrated using SPH by Morrison (2011, 2012).…”

A novel coupled fluid–particle DEM for simulating dense granular slurry dynamics

“…In wet granular slurries, the fluid-particle interaction is significant and has been modeled through one-way coupled DEM-CFD models (e.g. [2,3,6] and references therein) or two-way coupled models (e.g. [10]).…”