(447d) Calibration of a CFD-DEM Fluidised Bed Simulation for Plastic Recycling Using Positron Emission Particle Tracking
AIChE Annual Meeting
Wednesday, November 10, 2021 - 9:15am to 9:40am
The Discrete Element Method (DEM) does, when calibrated properly, reproduce the behaviour of moving granular material very well. Coupled with the well developed computational fluid dynamics (CFD) it provides a powerful tool in predicting the behaviour of a fluidised granular system such as fluidised beds.
These systems however need to be calibrated and even though the conventional techniques of calibration for DEM models such as shear cells or angle of repose measurements can lead to quantitative granular properties, the characterisation and calibration of the fluid phase is currently much less precise.
We use positron emission particle tracking, a Lagrangian particle tracking technique, to directly compare coupled DEM-CFD simulations of fluidised beds with real world fluidised beds. The rich, high-resolution data yielded by PEPT allows us to fine tune drag models and particle parameters in a significantly more precise manner than is possible using conventional measurements such as pressure drop alone.