Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
NUMERICAL INVESTIGATION OF GAS-SOLID FLUIDIZED BEDS IN NARROW TUBES
Submission Author:
Karlo Rocha , ES
Co-Authors:
Karlo Rocha, Fernando David Cúñez, Erick de Moraes Franklin
Presenter: Karlo Rocha
doi://10.26678/ABCM.COBEM2019.COB2019-0213
Abstract
In this study, the behavior of gas-solid fluidized beds in narrow tubes is numerically investigated using an Eulerian-Lagrangian approach (CFD-DEM). The beds were formed in a vertical tube with a diameter of D = 2:5 mm and were filled with glass spheres with a diameter of d = 0:5 mm. Two different beds were arranged, consisting of 400 and 600 glass beads, and three air flows that correspond to cross-sectional mean velocities of U = 1:05; U = 1:10 and U = 1:15 m/s were imposed at the bottom of the tube. Under these conditions, we observed the formation of alternating high- and low-compactness regions, known as plugs and bubbles, that propagate with characteristic lengths and celerities. The numerical simulations were performed using the open source codes CFDEM, OpenFOAM and LIGGGHTS. We tracked every single particle and the local volume fraction to obtain the main behavior of this problem.
Keywords
fluidized bed, gas-solid, plugs, CFD-DEM, Eulerian-Lagrangian method
