Open AccessEffect of Superficial Gas Velocity on the Solid Temperature Distribution in Gas Fluidized Beds with Heat Production
Author(s) -
M. Banaei,
Jeroen Jegers,
M. van Sint Annaland,
J.A.M. Kuipers,
N.G. Deen
Publication year - 2017
Publication title -
industrial and engineering chemistry research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.878
H-Index - 221
eISSN - 1520-5045
pISSN - 0888-5885
DOI - 10.1021/acs.iecr.7b00338
Subject(s) - fluidized bed , computational fluid dynamics , isothermal process , mechanics , nusselt number , thermodynamics , heat transfer , fluidization , materials science , superficial velocity , cfd dem , discrete element method , flow (mathematics) , chemistry , turbulence , physics , reynolds number
The hydrodynamics and heat transfer of cylindrical gas-solid fluidized beds for polyolefin production was investigated with the two-fluid model (TFM) based on the kinetic theory of granular flow (KTGF). It was found that the fluidized bed becomes more isothermal with increasing superficial gas velocity. This is mainly due to the increase of solids circulation and improvement in gas solid contact. It was also found that the average Nusselt number weakly depends on the gas velocity. The TFM results were qualitatively compared with simulation results of computational fluid dynamics combined with the discrete element model (CFD-DEM). The TFM results were in very good agreement with the CFD-DEM outcomes, so the TFM can be a reliable source for further investigations of fluidized beds especially large lab-scale reactors.
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