CFD-DEM modeling of a three-dimensional prismatic spouted bed

In this contribution coupled CFD-DEM-simulations of a laboratory prismatic spouted bed with two horizontal gas inlets are presented. With regard to a feasible simulation time, the simulations are parallelized and a coarse-graining approach is used in order to handle a high amount of particles. Diffe...

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Bibliographic Details
Published in:Powder technology 2017-07, Vol.316, p.245-255
Main Authors: Pietsch, Swantje, Heinrich, Stefan, Karpinski, Katja, Müller, Michael, Schönherr, Michael, Kleine Jäger, Frank
Format: Article
Language:English
Subjects:
3-D technology
Coarsening
Computer simulation
Discrete element method
Drag
Flow rates
Flow stability
Gas flow
Granulation
Inlets
Inlets (topography)
Mathematical models
Particulates
Pressure drop
Simulation
Stability analysis
Studies
Three dimensional models
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Summary:In this contribution coupled CFD-DEM-simulations of a laboratory prismatic spouted bed with two horizontal gas inlets are presented. With regard to a feasible simulation time, the simulations are parallelized and a coarse-graining approach is used in order to handle a high amount of particles. Different drag models are used within the simulations to evaluate their applicability to represent the experimental results. The spouting stability is analyzed by means of the time-dependent pressure drop behavior. The influence of draft plates in the process chamber on the particle flow patterns and spouting stability is investigated both numerically and experimentally. By means of simulations, the residence times of particles within the spray zone are evaluated for different gas flow rates. [Display omitted] •A three-dimensional spouted bed was modelled with a coupled CFD-DEM approach.•Drag models of Koch and Hill and Beetstra reproduce experimentally observed spouting behavior.•Influence of spouting stability on the spray zone was studied.•Spouting stability is improved by inserting draft plates into the process chamber.
ISSN:0032-5910
1873-328X
DOI:10.1016/j.powtec.2016.12.046