Publication Date:
2013-12-04
Description:
A novel phenomenological discrete bubble model was developed and tested for prediction of the hydrodynamic behavior of the dense phase of a 3D gas-solid cylindrical fluidized bed. The mirror image technique was applied to take into account the effects of the bed wall. The simulation results were validated against experimental data reported in the literature that were obtained by positron emission particle tracking. The time-averaged velocity profiles of particles predicted by the developed model were found to agree well with experimental data. The initial bubble diameter had no significant influence on the time-averaged circulating pattern of solids in the bed. The model predictions clearly indicate that the developed model can fairly predict the hydrodynamic behavior of the dense phase of 3D gas-solid cylindrical fluidized beds. Simulation of bubble behavior in a bubble swarm is time-consuming using traditional methods. Here, the simple phenomenological model dynamically predicts the dense phase velocity at each point in 3D freely bubbling gas-solid fluidized beds. The bubble mirror image technique was applied to take wall effects into account and a modification for the particle velocity in the wake of gas bubbles was proposed.
Print ISSN:
0930-7516
Electronic ISSN:
1521-4125
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
