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Independent prediction of slip velocity and hold‐up in liquid/liquid extraction columns
Author(s) -
Kumar Arun,
Hartland Stanley
Publication year - 1989
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.5450670104
Subject(s) - slip (aerodynamics) , reciprocating motion , mechanics , mass transfer , range (aeronautics) , physics , materials science , thermodynamics , composite material , gas compressor
The correlation of slip velocity using a large bank of published data for pulsed perforated‐plate, Karr reciprocating‐plate, rotating disc and spray extraction columns is presented. Based on more than 3,700 data points with and without mass transfer, empirical equations not including hold‐up for each of the columns are suggested which reproduce the slip velocity data over a wide range of variables. Explicit correlations for hold‐up in both the loose and dense‐packed regions of operation in spray columns are also presented which do not involve slip velocity. The equations presented are more exact and simpler to use than previous empirical correlations; these often involve the characteristic velocity which is difficult to accurately predict.