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Drop volumes and terminal velocities in aqueous two phase systems
Author(s) -
Bhavasar P. M.,
Jafarabad K. R.,
Pandit A. B.,
Sawant S. B.,
Joshi J. B.
Publication year - 1996
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.5450740606
Subject(s) - drop (telecommunication) , aqueous solution , nozzle , peg ratio , chemistry , aqueous two phase system , phase (matter) , sodium , chromatography , materials science , analytical chemistry (journal) , thermodynamics , physics , organic chemistry , engineering , mechanical engineering , finance , economics
The terminal velocities and sizes of drops in aqueous two‐phase systems formed by PEG (4000)‐sodium sulphate‐water, PEG (6000)‐sodium sulphate‐water and PEG (4000)‐dextran‐water were measured. Nozzle sizes were varied from 1.0 to 2.5 mm and the drops were formed of both light and heavy phases. Based on video photographic analysis for drop formation, the shape of the drop during formation was found to have an important bearing on the drop volume. Therefore a generalised model was developed using the video photographic measurements. A correlation was developed for the terminal velocities of the drops in aqueous two phase systems, which covers Morton numbers from 0.00211 to 11050 and Eötvös numbers from 0.091 to 288.