Title

Spreading Kinetics of a Drop on a Smooth Solid Surface

Abstract

Spreading of a drop on a perfectly smooth solid surface is analyzed using the method of matched asymptotic expansions. the analysis includes the effect of intermolecular forces near the contact line both on surface diffusion of adsorbed molecules and on flow within the liquid phase itself near the contact line. the former effect produces slip and allows the contact line to advance, while the latter effect is found to be small for most situations of interest. Equations obtained for drop shapes and spreading rates are formally similar to those found previously for rough surfaces, the main difference being that the length scale for the effective range of intermolecular forces replaces the length scale of surface irregularities in the definition of the small parameter used in the perturbation expansions. Expressions for the spreading rate are given for both zero and small but nonzero equilibrium contact angles. © 1982.

Department(s)

Chemical and Biochemical Engineering

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1982 Elsevier, All rights reserved.


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