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Interfacial tension from height and diameter of a single sessile drop or captive bubble
Author(s) -
Malcolm J. D.,
Elliott C. D.
Publication year - 1980
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.5450580203
Subject(s) - sessile drop technique , spinning drop method , drop (telecommunication) , contact angle , surface tension , bubble , solid surface , mechanics , materials science , composite material , chemistry , thermodynamics , physics , mechanical engineering , engineering , chemical physics
The silhouette of a sessile drop submerged in a transparent bulk phase appears to possess a contact angle of 180° with a plane solid support, when the drop is separated from the solid surface by a thin film of surrounding fluid. A computer‐aided analysis of the generalized sessile drop form leads to an explicit equation for interfacial tension dependent only on drop height (from apex to solid support) and the magnitude of the drop equatorial diameter. The equation is valid for a wide range of physically realizable drops. Measurements of drop profile coordinates or the location of the drop equator are not required for the use of the method, leading to improvements in accuracy relative to current practice.