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Singlejet fluidized beds: Experiments and CFD simulations with glass and polypropylene particles

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Title Singlejet fluidized beds: Experiments and CFD simulations with glass and polypropylene particles
 
Creator UTIKAR, RP
RANADE, VV
 
Subject digital image-analysis
granular flow
numerical-simulation
hydrodynamic models
bubble formation
kinetic-theory
behavior
validation
reactor
polymerization
fluidized beds
hydrodynamics
cfd
single jet
image analysis
pressure fluctuations
 
Description Understanding hydrodynamics of bubbling fluidized beds is crucial in proper design and scale up of these beds. CFD models have shown promise in gaining this understanding. In order to generate confidence in CFD models, predicted time averaged and dynamical characteristics of the bubbling fluidized beds need to be validated against experimental data. This paper describes such studies with rectangular fluidized beds operated with a central jet. Digital image analysis and analysis of wall pressure fluctuations were used for this characterization. Fluidization of two types of particles, glass and polypropylene (PP) was studied at two different initial bed heights of H/D = 1 and 2 with three central jet velocities 5, 10 and 20 m/s. Time averaged as well as dynamical characteristics were studied. The Eulerian-Eulerian two fluid model based on kinetic theory of granular flows was used to simulate these experiments. The predicted results were compared with the experimental data and previously published correlations. Although, there is agreement with experimental data in some aspects, complete agreement was not found. The presented experimental data and comparison with CFD predictions will provide useful basis for further work on understanding bubbling fluidized beds. (c) 2006
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2011-08-26T12:56:31Z
2011-12-26T12:57:27Z
2011-12-27T05:41:21Z
2011-08-26T12:56:31Z
2011-12-26T12:57:27Z
2011-12-27T05:41:21Z
2007
 
Type Article
 
Identifier CHEMICAL ENGINEERING SCIENCE, 62(1-2), 167-183
0009-2509
http://dx.doi.org/10.1016/j.ces.2006.08.037
http://dspace.library.iitb.ac.in/xmlui/handle/10054/11316
http://hdl.handle.net/10054/11316
 
Language en