Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
CFD SIMULATION AND VALIDATION OF A FLUIDIZED BED EXPERIMENT USING DIFFERENTS DRAG MODELS
Submission Author:
Thiago Gardin Fernandes , RS
Co-Authors:
Thiago Gardin Fernandes, Guilherme Henrique Fiorot, Fernando Pereira
Presenter: Thiago Gardin Fernandes
doi://10.26678/ABCM.COBEM2019.COB2019-1992
Abstract
The objective of this work is to perform a validation of the mathematical model applied by the software Star CCM + in applications involving fluidized bed and evaluate three drag models to fit with experimental data. This validation consists, primarily, on a study of the appropriate mesh size in order to describe the flow behavior, as well as an evaluation of the computational time required to describe the behavior of the bed through time-averages of the analyzed parameters. The reactor geometry based on experimental apparatus, particle properties and boundary conditions are maintained according to a previous study found on the literature. Also, the application of Arastoopour, Syamlal – O'Brien and Gidaspow drag coefficients are done for bed with Geldart B particles. The results show that a mesh approximately 10 times greater than the particle size, and a computational time of 20 seconds, can provide good results convergence compared to experimental data. Furthermore, it is possible to observe that both Gidaspow and Arastoopour drag models can provide results very close to those observed experimentally.
Keywords
fluidized bed, drag coefficient, CFD, Multi-phase flow
