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Moving contact lines on a two-dimensional rough surface

Published online by Cambridge University Press:  20 April 2006

Kalvis M. Jansons
Kalvis M. Jansons
Affiliation:
Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Silver Street, Cambridge CB3 9EW
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Abstract

The dynamic contact angle for a contact line moving over a solid surface with random sparse spots of roughness is determined theoretically in the limit of zero capillary number. The model exhibits many of the observed characteristics of moving contact lines on real rough surfaces, including contact-angle hysteresis and stick-slip. Several types of rough surface are considered, and a comparison is made between periodic and random rough surfaces.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 154 , May 1985 , pp. 1 - 28
Copyright
© 1985 Cambridge University Press

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