Prediction of solid recirculation rate and solid volume fraction in an internally Circulating Fluidized bed (ICFB)

Gujjula, R and Mangadody, Narasimha (2013) Prediction of solid recirculation rate and solid volume fraction in an internally Circulating Fluidized bed (ICFB). In: APCOM & ISCM, 11-14, December 2013, Singapore. (Submitted)

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Numerical & experimental study of gas and solid flow in an internally circulating fluidized bed (ICFB). The gas and solid hydrodynamics have been simulated by using the commercially available computational fluid dynamics (CFD) softwar e package, ANSYS’s Fluent. A three dimensional geometry was used to represent key parts of a laboratory ICFB. In 3D ICFB, the two - fluid Eulerian model with kinetic theory of granular flow option and the various drag laws like Gidaspow, Syamlal - Obrien, Gibl aro and Arastoopour drag models used to predict the hydrodynamic behavior of ICFB. The simulation results by four drag laws show that the Gidaspow and Arastoopour drag models predict the fluidization dynamics in terms of flow patterns, void fractions and a xial velocity fields were compared with experimental data. With the Arastoopour drag model the simulations are giving the best fits to the experimental data. The effect of superficial gas velocity, presence of draft tube on solid hold - up distribution, soli d circulation pattern, and variations in gas bypassing fraction for the 3D ICFB investigated through CFD simulations. The mechanism governing the solid circulation in an ICFB has been explained based on gas and solid dynamics obtained from the simulations.

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IITH Creators:
IITH CreatorsORCiD
Mangadody, Narasimha
Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Internally circulating fluidized bed , Solid recirculation rate , G ranular flow , Drag law models , Fluidization, Hydrodynamics .
Subjects: Chemical Engineering > Biochemical Engineering
Divisions: Department of Chemical Engineering
Depositing User: Team Library
Date Deposited: 17 Mar 2015 06:47
Last Modified: 22 Dec 2017 05:01
Publisher URL:
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