Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
EXPERIMENTAL INVESTIGATION OF LIQUID-SOLID FLUIDIZED BEDS IN A NARROW TUBE
Submission Author:
Fernando David Cúñez , SP
Co-Authors:
Fernando David Cúñez, Erick de Moraes Franklin
Presenter: Fernando David Cúñez
doi://10.26678/ABCM.ENCIT2018.CIT18-0087
Abstract
The behavior of liquid-solid fluidized beds in a narrow tube is experimentally investigated. The fluidized beds are formed in a 25.4 mm-ID tube and consisted of alumina spheres with 6mm diameter and specific gravity of 3.69; So, the ratio between the spheres and the tube is 4.23. The experiments have been carried out with two water flow rates corresponding to mean cross-sectional velocities of U = 0.137 and 0.164m/s, and three different arrangements of beds with 250, 400 and 500 spheres were used. With these conditions, it was possible to observe the formation of transverse waves, in the form of granular plugs that propagate with characteristic lengths and celerities. The fluidized beds were filmed with a high-speed camera, and the images were processed by using numerical codes in order to automatically identify and track the plugs.
Keywords
fluidized bed, liquid-solid, narrow tube, transverse waves
