Effect of Drag Models on the Numerical Simulations of Bubbling and Turbulent Fluidized Beds

Varghese, Mona Mary and Vakamalla, Teja Reddy and Mantravadi, Bhargav and Mangadoddy, Narasimha (2021) Effect of Drag Models on the Numerical Simulations of Bubbling and Turbulent Fluidized Beds. Chemical Engineering & Technology, 44 (5). pp. 865-874. ISSN 0930-7516

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Granular option enabled two-fluid model coupled with different homogeneous and heterogeneous drag correlations, i.e., Gidaspow, Syamlal and O'Brien, Beetstra, Brucato, Gibilaro, energy minimization multiscale method (EMMS), and Tenneti, are employed for the prediction of bubbling and turbulent fluidized-bed characteristics. Numerically predicted results are validated against the literature data in terms of bubble shape and diameter, axial and radial variation of time-averaged void fraction, pressure drop, and bed expansion. The Gidaspow, Syamlal and O'Brien drag model-predicted mean void fraction and bubble shapes are close to the experiments in bubbling and turbulent fluidized beds with both the 2D and 3D geometries. All drag models overpredicted the pressure drop at low superficial gas velocities in a turbulent fluidized bed.

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IITH Creators:
IITH CreatorsORCiD
Mangadody, Narasimhahttp://orcid.org/0000-0002-3123-2811
Item Type: Article
Uncontrolled Keywords: Bubbling fluidized bed; Computational fluid dynamics; Drag model; Hydrodynamics; Turbulent fluidized bed
Subjects: Chemical Engineering
Divisions: Department of Chemical Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 07 Jul 2021 04:09
Last Modified: 14 Mar 2022 06:33
URI: http://raiith.iith.ac.in/id/eprint/8145
Publisher URL: http://doi.org/10.1002/ceat.202000516
OA policy: https://v2.sherpa.ac.uk/id/publication/1519
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