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Unconventional Configuration Studies to Improve Mixing Times in Stirred Tanks
Author(s) -
Ascanio Gabriel,
BritoBazán Magdalena,
BritoDe La Fuente Edmundo,
Carreau Pierre J.,
Tanguy Philippe A.
Publication year - 2002
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.5450800419
Subject(s) - impeller , homogenization (climate) , mixing (physics) , mechanics , agitator , clockwise , materials science , perturbation (astronomy) , control theory (sociology) , physics , optics , computer science , artificial intelligence , amplitude , biodiversity , ecology , control (management) , quantum mechanics , biology
Dynamic perturbations and off‐centered single and dual mixing impeller configurations have been investigated to reduce mixing time with viscous fluids. Mixing times, measured with a color‐discoloration technique based on a fast acid‐base reaction, reveal the presence of both segregated and dead zones. A statistical design approach has been used to evaluate the effect of the impeller position as well as the dynamic conditions. Homogenization is significantly enhanced when a radial flow impeller is used under both off‐centered and dynamic perturbation conditions. In the case of an axial flow impeller, a combination of long clockwise times and short counter‐clockwise times give better mixing times. An enhanced homogenization is also observed when a dual impeller configuration is used.