Fluidized beds have been widely used in power generation and in the chemical, biochemical, and petroleum industries. 3D simulation of commercial scale fluidized beds has been computationally impractical due to the required memory and processor speeds. However, in this study, 3D Computational Fluid Dynamics simulation of a gas-solid bubbling fluidized bed has been performed to investigate the effect of using different inter-phase drag models. Furthermore, a method has been proposed to adjust the Di Felice Drag Model based on experimental value of minimum fluidization velocity as a calibration point. Comparisons with experimental data have been made based on solid volume fractions, expansion height, and pressure drop inside the fluidized bed at different superficial gas velocities. Finally, sensitivity analysis has been carried out to investigate the effect of using various restitution coefficients as well as the different grid interval spacing on the results with the objective of accuracy and time efficiency.;Keywords: Multiphase Flow, Fluidized Bed, Computational Fluid Dynamics, Inter-phase Drag Model.
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