Premium
The effect of surfactant on the terminal and interfacial velocities of a bubble or drop
Author(s) -
Leven M. Douglas,
Newman John
Publication year - 1976
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.690220411
Subject(s) - pulmonary surfactant , surface tension , drop (telecommunication) , terminal velocity , bubble , mechanics , chemistry , diffusion , terminal (telecommunication) , maximum bubble pressure method , materials science , thermodynamics , physics , engineering , telecommunications , biochemistry
Stream functions are dervied for a spherical droplet in creeping flow with an arbitary surface tension gradient at its interface. The stream functions are used to show theoretically that the terminal velocity is reduced and that the interfacial velocity is retarded, especially near the rear of the droplet, when a trace of surfactant is present in the exterior phase and when surface aging is controlled by diffusion.