Abstract
The capability of Fluent 6.2.16 to simulate particle
mixtures in a laboratory scale 2D circulating fluidized
bed (CFB) unit has been tested. In the simulations, the
solids were described as one or two particle phases. The
loading ratio of small to large particles, particle
diameters and the gas inflow velocity were varied. The
paper presents the segregation patterns of the particle
phases obtained from the simulations. When the fraction
of large particles was 50% or larger, large particles
segregated, as expected, to the wall regions and to the
bottom part of the riser. However, when the fraction of
large particles was 10%, an excess of large particles was
found in the upper half of the riser. The explanation for
this unexpected phenomenon was found in the distribution
of the large particles between the slow clusters and the
faster moving lean suspension.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 20th International Conference on Fluidized Bed Combustion |
| Place of Publication | Beijing |
| Pages | 851-856 |
| Publication status | Published - 2009 |
| MoE publication type | A4 Article in a conference publication |
| Event | 20th International Conference on Fluidized Bed Combustion - Xi'an, China Duration: 18 May 2009 → 21 May 2009 |
Conference
| Conference | 20th International Conference on Fluidized Bed Combustion |
|---|---|
| Country | China |
| City | Xi'an |
| Period | 18/05/09 → 21/05/09 |
Keywords
- particle mixtures
- CFD
- 2D
- hydrodynamics
- CFB
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Cite this
Seppälä, M., & Kallio, S. (2009). CFD Modelling of particle mixtures in a 2D CFB. In Proceedings of the 20th International Conference on Fluidized Bed Combustion (pp. 851-856).