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Influence of fluid rheology on circulation, mixing and blending
Author(s) -
Chavan V. V.,
Ford D. E.,
Arumugam M.
Publication year - 1975
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.5450530607
Subject(s) - rheology , shear thinning , laminar flow , impeller , mixing (physics) , mechanics , materials science , elasticity (physics) , shear (geology) , circulation (fluid dynamics) , simple shear , composite material , physics , quantum mechanics
The measurements of the integral physical quantities such as circulation, mixing and blending times for helical screw impellers with the draught tube are presented in this paper. The influence of shear‐thinning and elastic properties of the liquids on these quantities are analysed both experimentally and theoretically. The overall circulation was found to be independent of the shear‐thinning character of the liquid. The influence of elasticity is considered in the light of the existing knowledge on sonic simple flow situations. A relation which incorporates the geometry of the mixer and the rheological properties of the liquid is proposed. The mixing and blending time results are analysed and related to the hydrodynamics using the laminar mixing approach of Mohr and his co‐workers. Although the analysis is approximate, it provides a useful tool in explaining the effects of rheology. It also suggests a way to estimate the blending times.