Stable drop shapes under disjoining pressure: III. Sharp contact lines

The shape and stability of a drop with a sharp contact line are analyzed. The disjoining pressure is included. The choice made for the latter is special in that it admits a sharp contact angle as appropriate in this case. The stability analysis is considered for two scenarios, one where the contact...

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Bibliographic Details
Published in:Journal of colloid and interface science 2003-09, Vol.265 (2), p.404-408
Main Author: Neogi, P.
Format: Article
Language:English
Subjects:
Chemistry
Disjoining pressure
Exact sciences and technology
General and physical chemistry
Nonwetting drops
Solid-liquid interface
Stability
Surface physical chemistry
Online Access:Get full text
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Summary:The shape and stability of a drop with a sharp contact line are analyzed. The disjoining pressure is included. The choice made for the latter is special in that it admits a sharp contact angle as appropriate in this case. The stability analysis is considered for two scenarios, one where the contact line cannot be moved which mode turns out to be stable to small perturbations, and the other where it can be moved but the contact angle is fixed at the equilibrium value. This second case turns out to be unstable to small perturbations due to the curvature effect of the drop.
ISSN:0021-9797
1095-7103
DOI:10.1016/S0021-9797(03)00484-3