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Stabilizing effects of surfactants on pseudoplastic falling films
Author(s) -
Skelland A. H. P.,
Popadic Vujadin O.
Publication year - 1974
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690200316
Subject(s) - shear thinning , pulmonary surfactant , viscosity , newtonian fluid , rheology , shear rate , materials science , apparent viscosity , non newtonian fluid , chemistry , flow (mathematics) , volumetric flow rate , thermodynamics , chemical engineering , composite material , mechanics , physics , biochemistry , engineering
The effects of nonionic surfactants on thin‐film flow of pseudoplastic non‐Newtonian liquids down a smooth vertical plate have been studied experimentally. For all liquids examined there was a surfactant concentration at which the stabilizing action of surfactants was maximized. Comparison with experimental data showed that an existing equation, developed for the stabilizing action of surfactants on thin‐film flow of Newtonian fluids, may be used to predict the effect of surfactants on the stability of pseudoplastic thin‐film flow by using the zero‐shear rate apparent viscosity in place of the Newtonian viscosity.