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The influence of surfactants on mass transfer around spheres
Author(s) -
Lochiel A. C.
Publication year - 1965
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.5450430108
Subject(s) - spheres , drag , mass transfer , pulmonary surfactant , viscosity , phase (matter) , reynolds number , flow (mathematics) , mechanics , materials science , chemistry , thermodynamics , chromatography , physics , composite material , organic chemistry , astronomy , turbulence
Equations are derived to predict the effect of trace surface‐active impurities on mass transfer across a spherical interface. Transfer in the bulk phase surrounding spheres with both rapid and slow internal circulation, and moving in creeping flow, is shown to decrease on increasing the surfactant concentration. Drag and transfer equations for contaminated rapidly‐circulating spheres moving at high Reynolds numbers are in semi‐quantitative agreement with published data. The influence of surface‐active contaminants on drag and transfer decreases as the viscosity of the bulk phase is increased.