CFD and experimental studies of solids hold-up distribution and circulation patterns in gas–solid fluidized beds

The hydrodynamics of a gas–solid fluidized bed was studied using a combination of experiments and CFD simulations. Experiments were conducted with polypropylene particles (710–1000 μm in diameter) as solid phase and air as gas phase. A multifluid Eulerian model incorporating the kinetic theory for s...

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Bibliographic Details
Published in:Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2008-09, Vol.143 (1), p.147-160
Main Authors: Ahuja, G.N., Patwardhan, A.W.
Format: Article
Language:English
Subjects:
Applied sciences
CFD
Chemical engineering
Euler–Euler two-fluid model
Exact sciences and technology
Fluidization
Gamma ray attenuation
Gas–solid fluidized bed
Hydrodynamics of contact apparatus
Solids hold-up
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Summary:The hydrodynamics of a gas–solid fluidized bed was studied using a combination of experiments and CFD simulations. Experiments were conducted with polypropylene particles (710–1000 μm in diameter) as solid phase and air as gas phase. A multifluid Eulerian model incorporating the kinetic theory for solid particles is used to simulate the gas–solid flow. Momentum exchange coefficient was calculated using the Gidaspow drag model. Effects of gas velocity, type of sparger, presence of draft tube on solid hold-up distribution and solid circulation pattern have been investigated. The presented experimental data and comparison with CFD predictions provide useful basis for further work on understanding bubbling fluidized beds.
ISSN:1385-8947
1873-3212
DOI:10.1016/j.cej.2008.03.011