CFD modeling of droplet permeability in fluidized beds

D.M. Balice, C.W.C. Molenaar, M. Fochesato, C.M. Venier, I. Roghair (Corresponding author), N.G. Deen, M. van Sint Annaland

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

5 Citaten (Scopus)
164 Downloads (Pure)

Samenvatting

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.

Originele taal-2Engels
Artikelnummer104069
Aantal pagina's14
TijdschriftInternational Journal of Multiphase Flow
Volume152
DOI's
StatusGepubliceerd - jul. 2022

Bibliografische nota

Publisher Copyright:
© 2022 The Author(s)

Vingerafdruk

Duik in de onderzoeksthema's van 'CFD modeling of droplet permeability in fluidized beds'. Samen vormen ze een unieke vingerafdruk.

Citeer dit