Adhesion

Poster at Royal Society of Chemistry Formative Formulation Workshop, Maxwell Centre, University of Cambridge

Wet granulation is a process used to create larger stable agglomerates (granules) from fine powders. However, despite wide adoption, it is often inefficiently operated, with high recycle ratios in continuous processes and high rejection rates in batch processes. This numerical study simulates a GEA ConsiGma™ 1 Twin Screw Granulator (TSG), following a standard framework for model-driven design.

Poster at 8th World Congress on Particle Technology, Orlando, FL., USA

Wet granulation is a process used to create larger stable agglomerates (granules) from fine powders. This numerical study simulates a GEA ConsiGma™ 1 Twin Screw Granulator (TSG), following a standard framework for model-driven design.

Poster at 8th World Congress on Particle Technology, Orlando, FL., USA

This study employs the Discrete Element Method (DEM) to study a 25 mm diameter, GEA ConsiGma™ 1 Twin Screw Granulator (TSG), with a typical 60°configuration for kneading elements. The DEM simulations were conducted using the commercial code EDEM.

Poster at PARTEC 2016: International Congress on Particle Technology

This guide provides the key information regarding an adhesive elasto-plastic contact model for EDEM that has been in development over many years at the University of Edinburgh.

An example problem (uniaxial compression) for the Edinburgh Cohesion Model.

Bulk handling of powders and granular solids is common in many industries and often gives rise to handling difficulties especially when the material exhibits complex cohesive behavior. For example, high storage stresses in a silo can lead to high cohesive strength of the stored solid, which may in turn cause blockages such as ratholing or arching near the outlet during discharge. This paper deploys the Discrete Element Method to study the discharge of a granular solid from a flat-bottomed silo with varying levels of cohesion and varying levels of internal friction which arises from a combination of particle interlocking and contact friction (sliding and rolling).