(271b) Don’t get stuck: A DEM model for particle-particle cohesion using simple bulk experiments
AIChE Annual Meeting
Tuesday, November 15, 2022 - 8:18am to 8:36am
State-of-the-art, particle-based methods for assessing particle-particle cohesion are often impractical for industrial use, due to the associated time, costs, and expertise involved in AFM measurements and the like. In this work, we assess the use of a commercial rheometer to extract the force- and energy-based quantities needed to formulate a simple yet sufficient, physically-based, particle-particle cohesion model. The resulting model is validated quantitively with a different experimental system, namely one designed to the angle of repose. This system includes both brief and enduring contacts (i.e., energy-based and force-based), thereby providing a robust experimental test of the model. The resulting cohesion model is useful both directly in DEM simulations and indirectly for obtaining closures to population balances (continuum models).