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Type: Artigo de evento
Title: A Three Dimensional Computational Fluid Dynamic (cfd) Model For The Flow Inside Fcc Regenerators
Author: Pedrosa S.M.C.P.
Nunhez J.R.
Fusco J.M.
Martignoni W.P.
Abstract: The behavior of a gas-solid three-dimensional fluidized bed reactor with a central jet was modeled using a computational fluid dynamic (CFD) approach. The numerical data from the model was obtained using the commercial software package CFX4.4 from AEA technology. The CFD model was based on a two fluid Eulerian-Eulerian model where the two phases were modeled as a continuum. Simulations of the gas-solid fluidized bed are made using both two and three-dimensional model. The numerical results were consistent qualitatively and quantitatively with numerical data reported in the literature. The two-phase flow model considered both phases as inviscid. No slip boundary conditions were set at the walls of the fluidized bed for both phases (the velocity of the gas and solid phases was set to zero at the walls). The shape of the simulated bubble was a little bit slimmer at its end in contrast to a real rounded shape of a bubble. Very fine grids using the UPWIND scheme gave a rounded bubble shape, but it was prohibitively expensive. No significant difference for the bubble was observed when comparing the two and three-dimensional model. The three-dimensional section is located in a plane equally distant from the front and back walls.
Rights: fechado
Identifier DOI: 
Date Issue: 2002
Appears in Collections:Unicamp - Artigos e Outros Documentos

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