Abstract
Mesoscale flow structures such as clusters and streamers
of particles are characteristic features of gas-solid
flow in fluidized beds. Numerical simulations of
gas-solid flows for industrial-scale fluidized beds are
often performed using the Eulerian description of phases.
An accurate prediction of this type of flow structure
using the Eulerian modeling approach requires a
sufficiently fine mesh resolution. Because of the long
computational time required when using fine meshes,
simulations of industrial-sized units are usually
conducted using coarse meshes, which cannot resolve the
mesoscale flow structures. This leads to an
overestimation of the gas-solid drag force and a false
prediction of the flow field. For these cases, a
correction must be formulated for the gas-solid drag. We
have simulated a large-scale circulating fluidized bed
furnace using different gas-solid drag models and
compared the model results with measurements.
Original language | English |
---|---|
Pages (from-to) | 66-75 |
Journal | Particuology |
Volume | 18 |
DOIs | |
Publication status | Published - 2015 |
MoE publication type | A1 Journal article-refereed |
Keywords
- circulating fluidized bed
- computational fluid dynamics
- two-fluid model
- drag correlation
- modeling