EPJ Web Conf.
Volume 249, 2021Powders & Grains 2021 – 9th International Conference on Micromechanics on Granular Media
|Number of page(s)||4|
|Published online||07 June 2021|
Analysis of hold-up and grinding pressure in a spiral jet mill using CFD-DEM
School of Chemical and Process Engineering, The University of Leeds, UK
* Corresponding author: M.Ghadiri@leeds.ac.uk
Published online: 7 June 2021
A spiral jet mill was simulated using Discrete Element Method modelling and Computational Fluid Dynamics. The particle behaviour and fluid motion were analysed as a function of hold-up and grinding pressure. Particle collision energy was predicted to be prevalent along the bed surface and in front of the grinding jets, as shown through the collision data recorded. The bed itself affects the fluid flow field, as momentum is transferred to the particles. Increasing the grinding pressure does not result in a proportional increase in the kinetic energy of the particle system, as the high pressure jets begin to penetrate the bed with greater ease. The particle bed moves as ‘plug-flow’, with the layers of the bed closest to chamber wall.
A video is available at https://doi.org/10.48448/np26-0710
© The Authors, published by EDP Sciences, 2021
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