Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
ANALYSIS OF THE FLUID DYNAMICS OF A SPOUTED BED WITH AND WITHOUT DRAFT TUBE: MODELING AND SIMULATION
Submission Author:
Ana Clara Nery , PB , Brazil
Co-Authors:
Ana Clara Nery, Severino Rodrigues de Farias Neto, Antonio Vieira
Presenter: Ana Clara Nery
doi://10.26678/ABCM.COBEM2021.COB2021-1952
Abstract
The spouted bed was created in Canada in 1954, to improve the efficiency of grain drying, it was seen that the equipment offers an effective fluid/solid contact and generating an excellent degree of mixing, resulting in high heat and mass transfer rates between phases. This equipment is used in different industrial areas, such as drying, particle coating, mechanical extraction. The conventional spouted bed presents limitations such as the phenomenon known as "short circuit". To minimize this effect an internal tube is used. In this context, the purposed this word is to evaluate the fluid dynamics behavior of the conventional spouted bed and with an internal tube using Computational Fluid Dynamics (CFD). The Eulerian-Eulerian approach was adopted to simulate gas-particle flow in a three-dimensional domain. The constitutive correlations and the turbulence model k- e were adopted. All simulations were conducted using the commercial package Ansys Fluent®. The results of the simulations show the formation of the spouted bed (with or without draft tube) shows three regions: annular, spouted and fountain. A discrepancy was also seen in the first moments of the formation of the spouted bed. These results ratify the observation of different works reported in the literature. The results also showed a dependence on the behavior of the spouted bed with the flow rate of the gas stream.
Keywords
multiphase flow, Spouted bed, CFD, Eulerian-Eulerian approach
