Eventos Anais de eventos
ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
Crystallization in Bidispersed Beds
Submission Author:
Vinícius Oliveira , SP , Brazil
Co-Authors:
Vinícius Oliveira, Willian Righi Assis, Erick de Moraes Franklin
Presenter: Vinícius Oliveira
doi://10.26678/ABCM.ENCIT2022.CIT22-0058
Abstract
Fluidized beds are described as suspensions of solid particles (grains) in a vertical duct by an upward flow of fluid forced against a porous plate. When the aspect ratio (relation between the diameters of the tube and the grain) is equal to or less than ten, the fluidized bed is said to be a very narrow fluidized bed. The bed behavior is influenced by the interstitial fluid. For example, if it is a liquid in a low grain concentration, fluid interactions are dominant, such as drag interactions, buoyancy and virtual mass; on the other hand, if it is a gas, particle interactions such as shocks and solid friction are more prominent. Narrow fluidized beds have very rich dynamics at both the bed (macroscopic) and the grain (microscopic), with phenomena such as crystallization, blockages and plug formation occurring at the bed scale while shocks, sliding and vortex shedding at the grain scale. The addition of a different particle species causes other phenomena to appear, such as mixing and layer inversion, in addition to the modifications in bed crystallization. This work investigates the crystallization in bidisperse beds. We also present, among other results, the mean temporal evolution of the granular temperature, crystallization time, and intensities for bidisperse and monodisperse beds.
Keywords
Bidisperse beds, crystallization, Granular temperature
