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EMMS and Syamlal O’Brien Hydrodynamic Modelling for Uniform and Non-Uniform Air Distributor in a Bubbling Fluidized Bed: Numerical Analysis


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DOI: https://doi.org/10.15866/ireme.v17i12.23006

Abstract


In this study, the hydrodynamics of the gas-solid flow in the bubbling fluidized bed have been simulated by using a Computational Fluid Dynamics (CFD) model with a two-model Eulerian approach. The bed is shaped like a rectangular column with a diameter of 0.28 meters and a height of 1 meter. The solids are spherical sand grains with a diameter of 276 mm, which characterize the solid phase and the gas, respectively. For a superficial gas velocity of 0.46 m/s, the impacts of the Syamlal O'Brien and EMMS drag models on the gas volume fraction profile, bed expansion, pressure drop, and bubble size have been investigated. The bed hydrodynamics predicted by the EMMS model and the findings of the experiment have been in good agreement. It has also been looked at how different types of uniform and non-uniform air distributors with pore sizes of 7 mm and 4 mm affected the effectiveness of the motion of the gas and solid.
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Keywords


EMMS Drag Model; Syamlal O’Brien Drag Model; Hydrodynamic; Air Distributor; Fluidized Bed

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References


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