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Pipeline flow of unstable and surfactant‐stabilized emulsions
Author(s) -
Pal Rajinder
Publication year - 1993
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.690391103
Subject(s) - laminar flow , drag , pulmonary surfactant , turbulence , mechanics , emulsion , flow (mathematics) , materials science , chemistry , thermodynamics , physics , organic chemistry
The literature available on pipeline flow behavior of emulsions is reviewed critically. New results concerning the laminar and turbulent flow behaviors of unstable (without any added surfactant) and surfactant‐stabilized water‐in‐oil emulsions are presented. The unstable emulsions exhibit drag reduction behavior in turbulent flow; the measured friction factors fall well below the values expected on the basis of the laminar flow properties. Unstable water‐in‐oil emulsions exhibit much stronger drag reduction activity than the unstable oil‐in‐water emulsions. The drag reduction activity diminishes (in some cases vanishes completely) upon the addition of a surfactant to the system.