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Fine‐grid simulations of gas‐solids flow in a circulating fluidized bed
Author(s) -
Benyahia Sofiane
Publication year - 2012
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.13826
Subject(s) - fluidization , energy (signal processing) , grid , work (physics) , national laboratory , flow (mathematics) , computer science , fluidized bed , operations research , mechanics , mechanical engineering , engineering , physics , engineering physics , thermodynamics , mathematics , statistics , geometry
This research note demonstrates that more accurate predictions of a two-fluid model for the riser section of a circulating fluidized bed are obtained as the grid size is equally refined along all the directions of the gas-particle flow. However, two-fluid simulations of large-scale fluidized beds with such a fine mesh are currently computationally prohibitive. Alternatively,subgrid models can significantly reduce the simulation time of multiphase flow by using coarse mesh, whereas maintaining a high level of accuracy.