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On the drift‐flux analysis of flotation and foam fractionation processes
Author(s) -
Stevenson Paul,
Fennell Paul S.,
Galvin Kevin P.
Publication year - 2008
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.20076
Subject(s) - foam fractionation , flux (metallurgy) , mechanics , fractionation , multiphase flow , environmental science , geology , materials science , chromatography , chemistry , thermodynamics , physics , metallurgy , pulmonary surfactant
Drift‐flux analyses are a common way of estimating the phase fractions and fluxes in vertical multiphase flows. However their use has had scant impact on the flotation and foam fractionation communities despite the publication of a number of such analyses over the past two decades. By recognizing that the physics that underpin the hydrodynamics of the froth are dissimilar to those that pertain to the bubbly liquid beneath, we present a drift‐flux analysis with two characteristic curves. A method for obtaining the characteristic curve for the froth from experimental data for the drainage of stationary foams is presented.