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A two‐dimensional model for gas mixing in the upper dilute zone of a circulating fluidized bed
Author(s) -
Kruse M.,
Schoenfelder H.,
Werther J.
Publication year - 1995
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450730505
Subject(s) - mixing (physics) , mechanics , fluidized bed combustion , dispersion (optics) , flow (mathematics) , range (aeronautics) , materials science , suspension (topology) , gas phase , fluidized bed , thermodynamics , environmental science , physics , mathematics , composite material , optics , quantum mechanics , homotopy , pure mathematics
Abstract Based on measurements in a circulating fluidized test unit with a riser of 0.4 m i.d., a two‐dimensional two‐phase model for gas mixing has been developed. Radial gas dispersion and gas backmixing caused by dense clusters falling countercurrently to the main flow of a lean gas/solid suspension are considered. The model has successfully been compared with experimental data over a wide range of operating conditions. The model accounts for the main mixing phenomena and may be applied to calculations of chemical reactions in CFB risers.