Keynote Talk: Evaluation of Coarse Graining Strategy and Degree in DEM-CFD Simulations of Cyclone Flow
In the present work, simulations of the two-phase flow in complex gas-solid cyclones are investigated at different gas and solid loadings. In particular, the attention is focused on the effect that the coarse graining strategy and degree exert on the replicability of the results as compared to pure DEM-CFD simulations and experimental data. A standard high-efficiency cyclone design is considered for simplicity, although more complex geometries do not introduce particular limitations. The number of particles represented by a parceland the scaling of properties is examined both in terms of the macroscopic performance indicators, like separation efficiency and gas pressure drop, and the local distribution of the gas and solid flows inside the cyclone, including vortex formation, solids sliding, number of turns and particle entrainment.
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