Artículo
CFD modeling of droplet permeability in fluidized beds
Balice, D.M.; Molenaar, C.W.C.; Fochesato, M.; Venier, César Martín
; Roghair, I.; Deen, N.G.; van Sint Annaland, M.
Fecha de publicación:
07/2022
Editorial:
Pergamon-Elsevier Science Ltd
Revista:
International Journal Of Multiphase Flow
ISSN:
0301-9322
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The deposition of droplets of size [5–22] μm on the surface of particles in a gas–solid fluidized bed has been investigated employing a one-way coupled CFD-DEM modeling. In this approach the gas phase is solved as a continuum and the free-droplets are solved as Lagrangian objects, while solid particles are assumed to be stationary and act as an obstacle for the fluid flow. In this way, it was possible to calculate the deposition factor, defined as the ratio of droplets deposited on the surface of the particles to the number of droplets injected into the domain as a function of the droplet Stokes number and particle Reynolds number. An empirical correlation was developed that describes the deposition factor as a function of the operating conditions, which is valid for the inertial regime where effects of Brownian motion can be neglected. The final goal of this investigation is to employ the developed correlation in a larger scale CFD-DEM model describing a polymerization fluidized bed reactor operated in condensed mode, i.e. by injecting liquid into the gas–solid suspension through the gas distributor plate or via nozzles in order to improve the heat management. In this kind of modeling the free-droplets phase is described as a continuum and the deposition rate of droplets determines the amount of liquid on the particle surface, which affects for the hydrodynamic (i.e. formation of liquid bridges between particles) and thermal behavior (i.e. liquid evaporation, kinetic and subsequent cooling effect) of the system.
Palabras clave:
CFD-DEM
,
DROPLETS
,
FLUIDIZED BED
,
GRANULAR MATTER
,
MULTIPHASE FLOW
,
OPENFOAM
,
PARTICLES
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CIMEC)
Articulos de CENTRO DE INVESTIGACION DE METODOS COMPUTACIONALES
Articulos de CENTRO DE INVESTIGACION DE METODOS COMPUTACIONALES
Citación
Balice, D.M.; Molenaar, C.W.C.; Fochesato, M.; Venier, César Martín; Roghair, I.; et al.; CFD modeling of droplet permeability in fluidized beds; Pergamon-Elsevier Science Ltd; International Journal Of Multiphase Flow; 152; 104069; 7-2022; 1-39
Compartir
Altmétricas