Jobin Raju

CFD–DEM and PBM simulation of fluidized bed opposed jet mills for particle micronization

Host Institutions

Technical University of Braunschweig [ 24 months ]
DCS Computing [ 12 months ]

Closing Date:

Monday 15, March 2021


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This project studies the dry comminution of particles (down to 5 µm) using high-energy fluidized bed opposed jet mills where the high forces upon entrainment and collision of particle-loaded airborne jets induce particle breakage in an environment with extremely low product contamination.

Specific objectives are:
  1. Investigate fundamental mechanisms of comminution of micro-particles in fluidized bed opposed jet mills using coupled CFD–DEM models;
  2. Conduct experiments to characterise the particle properties and the separating function of the air wheel classifier;
  3. Validation of the simulation on jet mills at the Technical University of Braunschweig and SACMI’s facilities and simulations to inform PBM.
Expected Results:
  1. Literature study and model evaluation;
  2. CFD–DEM particle-scale models of particle motion, stress energy and frequency distributions for jet mill predictions;
  3. Experimental measurements of particle characteristics and separating function, to calibrate and validate the PBM.

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Application is now closed.