CFD-DDPM coupled with an agglomeration model for simulation of highly loaded large-scale cyclones: Sensitivity analysis of sub-models and model parameters

Cfd Simulation and Experimental Validation of Multiphase Flow in Industrial Cyclone Preheaters

“…The development of the numerical model is presented in detail in our previous work [33,34]. This model was successfully validated for the simulation of hydrodynamics of a highly loaded large-scale cyclone in our previous work [33,34]. It was found that the revised Sarkar drag model [46] (which is a sub-grid drag model) provides slightly better predictions of important performance parameters of highly loaded large-scale cyclones.…”

“…In FTIR measurement (infrared IR fiberoptic spectroscopic method [34]) the local gas temperature in front of the probe tip was extracted from the measured FTIR thermal emission spectrum; it can be found from FTIR thermal emission from CO 2 at around 2350 cm − 1 (4.3 μm) by scaling with Planckian curve. Details of the developed system can be found in the literature [44,45].…”

“…In the present work, a hybrid Eulerian-Lagrangian multiphase model, Dense Discrete Phase Model (DDPM) in Ansys Fluent (2021R1) solver coupled with a dispersed version of the k-ω sst turbulence model sensitized to rotation and curvature is used. The development of the numerical model is presented in detail in our previous work [33,34]. This model was successfully validated for the simulation of hydrodynamics of a highly loaded large-scale cyclone in our previous work [33,34].…”

“…DEM is too expensive to be implemented in industrial-scale simulations (Although coarse-graining strategies are available to reduce computational expenses of DEM [30][31][32], its current application in cyclones is still limited to lab-scale cases [22][23][24][25][26][27]), and the Eulerian-Eulerian model cannot easily handle the polydispersity of particles which is quite crucial in the performance of cyclones. On the other hand, a more novel hybrid multiphase model, the Dense Discrete Phase Model, that has been successfully validated for the simulation of hydrodynamics of multiphase flow in a highly loaded large-scale cyclone in our previous work [33,34] is a promising and feasible model.…”

“…Regarding the limited availability of the experimental data, to obtain the lacking knowledge to bridge the gaps of understanding of what is happening inside industrial cyclone preheaters, a CFD model with detailed validation of flow and temperature distribution, to be utilized with confident for simulation of highly loaded industrial cyclone preheaters is missing. To simulate highly loaded industrial cyclone preheaters, gas, solid, and gas-solid heat transfer modeling need to be added to the model developed for the simulation of hydrodynamics of multiphase flow in the previous work [33,34].…”