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On minimum power requirements for emulsification of two‐phase, liquid systems
Author(s) -
Esch D. D.,
D'ANGELO P. J.,
Pike R. W.
Publication year - 1971
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.5450490627
Subject(s) - impeller , entrainment (biomusicology) , phase (matter) , range (aeronautics) , mechanics , ranging , power (physics) , reynolds number , materials science , mathematics , control theory (sociology) , thermodynamics , computer science , physics , acoustics , turbulence , telecommunications , control (management) , quantum mechanics , artificial intelligence , rhythm , composite material
Power requirements were measured for several, two‐phase, liquid systems with viscosities ranging from 0.391 to 215 centipoise in a baffled, cylindrical vessel conforming to a standard tank configuration. A correlation was developed for the minimum power needed in order to maintain a uniform emulsion. For the systems studied it was found that the product of minimum impeller speed and the weighted average density was only a function of the respective continuous phase properties. Measurements, made over a range of impeller speeds from the minimum required to maintain an emulsion up to the point where gas entrainment occurred, were accurately described by single phase power curve. For more than 250 points with Reynolds numbers ranging from 500 to greater than 100,000, the average absolute error in the experimentally measured power number for two phase systems was found to be 4.0% based on the corresponding single phase power number curve