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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Influence of the Granular Temperature in the Numerical Simulation of Gas-Solid Flow in a Bubbling Fluidized Bed

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Author(s):
Mineto, Andreza Tangerino [1] ; De Souza Braun, Meire Pereira [1] ; Navarro, Helio Aparecido [1] ; Cabezas-Gomez, Luben [2]
Total Authors: 4
Affiliation:
[1] Escola Engn Sao Carlos, Dept Engn Mecan, Sao Paulo - Brazil
[2] Pontificia Univ Catolica Minas Gerais, Dept Engn Mecan, Belo Horizonte, MG - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Chemical Engineering Communications; v. 201, n. 8, p. 1003-1020, AUG 3 2014.
Web of Science Citations: 1
Abstract

This article describes a mathematical model and numerical simulation of gas-solid flow in a bubbling fluidized bed (BFB), where the the two-fluid Eulerian-Eulerian model was used and the solid phase stress tensor was modeled considering both the friction between particles and the kinetic theory of granular flows. The code MFIX (Multiphase Flow with Interphase eXchanges) developed by NETL (National Energy Technology Laboratory, U. S. Department of Energy) was used for numerical simulations, and the results were obtained through computing the granular temperature by using a partial differential equation (PDE) or an algebraic expression. More realistic results were obtained when a PDE with boundary conditions of the partial slip was used. However, for computing the granular temperature in the case of fine grids, it is recommended to use the algebraic equation because it will save computational effort in simulations. Variation in the diameter of the particles (Group B and Group A/B) was also analyzed, and, consequently, it was observed that in future analysis a term for capturing the influence of cohesive forces should be added for particles of Group A/B. This study has revealed that a smooth transition between the viscous regime and the plastic regime is necessary for simulating a hydrodynamic bubbling fluidized bed. (AU)

FAPESP's process: 10/19769-4 - Study of the dynamic in gas-solid systems by numerical simulation using particle and finite volume approaches
Grantee:Helio Aparecido Navarro
Support type: Regular Research Grants
FAPESP's process: 12/03468-0 - Study of the dynamic in granular systems by numerical simulation using particle and finite volume approaches
Grantee:Helio Aparecido Navarro
Support type: Scholarships abroad - Research