3D Eulerian Simulation Of A Gas-solid
Bubbling Fluidized Bed:
Assessment Of Drag Coefficient Correlations
Author(s)
E. Esmaili & N. Mahinpey
Abstract
Fluidized beds have been widely used in power generation and in the chemical,
biochemical, and petroleum industries. The 3D simulation of commercial scale
fluidized beds has been computationally impractical due to the required memory
and processor speeds. However, in this study, 3D Computational Fluid Dynamics
simulation of a gas-solid bubbling fluidized bed is performed to investigate the
effect of using different inter-phase drag models. The drag correlations of
Syamlal–O’Brien, Gidaspow, and Wen–Yu are reviewed using a multiphase
Eulerian–Eulerian model to simulate the momentum transfer between phases.
Comparisons are made with both a 2D Cartesian simulation and experimental
data. The experiments are performed on a Plexiglas rectangular fluidized bed
consisting of spherical glass beads and ambient air as the gas phase. The aim of
this work is to present an optimum drag model to simulate the momentum
transfer between phases and compare the results using 3D versus 2D simulation
of gas-solid bubbling fluidized beds. Comparisons were made based on solid
volume fractions, expansion height, and pressure drop inside the fluidized bed at
different superficial gas velocities. The results were found to agree well with
experimental data.
Keywords: multiphase flow, fluidized bed, computational fluid dynamics,
interphase drag model.
Keywords
multiphase flow, fluidized bed, computational fluid dynamics,
interphase drag model
Related Book
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