Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Interfacial Oscillations in Bidisperse Beds
Submission Author:
Vinícius Oliveira , SP , Brazil
Co-Authors:
Vinícius Oliveira, Danilo da Silva Borges, Erick de Moraes Franklin
Presenter: Vinícius Oliveira
doi://10.26678/ABCM.COBEM2023.COB2023-0119
Abstract
Fluidized beds are described as suspensions of solid grains in a vertical duct by an upward fluid flow. When the ratio between the grain and duct diameters (widths) is less than 10, the bed is classified as very narrow. These kinds of fluidized beds are a novel technology with increasing interest, being used in sediment classifiers and wastewater treatment. However, the state-of-the-art over the last decades dedicated itself to investigating phenomena in monodisperse beds. The addition of another grain type in a fluidized bed would give a better approximation of physical phenomena in real beds, that are actually polydisperse. In this work, we compare the interfacial motion occurring between layers in a bidisperse bed with that at the top of a monodisperse pile. We obtain the amplitude, contribution of each pile in bed height, and relation of mean bed heights for each case. We also compare the velocity fluctuation of particles near the interface with fluctuations far from it.
Keywords
Very-narrow fluidized beds, segregation, polydisperse beds, granular matter
