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McHale, G and Newton, MI 
ORCID: https://orcid.org/0000-0003-4231-1002,
2002.
Global geometry and the equilibrium shapes of liquid drops on fibers.
Colloids and Surfaces A - Physicochemical and Engineering Aspects, 206 (13), pp. 79-86.
ISSN 0927-7757
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Abstract
The wetting of a planar surface depends upon both the chemical nature of the surface and the local geometry. On a chemically identical solid surface in the form of a fiber the wetting is significantly different due to the global geometry of the cylindrical shape. A fluid that fully wets a material in the form of a smooth planar surface may not wet the same material when presented as a smooth fiber surface. On a fiber, a vanishing contact angle is not a sufficient condition for the formation of a wetting film; a macroscopic barrel shaped droplet with a vanishing equilibrium contact angle can exist. Moreover, two distinctly different geometric shapes of droplet are possible: a barrel and a clam-shell. In this work, these two shapes are considered using an analytical result for the barrel shape and a finite element calculation for the clam-shell shape. The surface free energies for these two conformations are evaluated for contact angles between 14 and 70° and for a wide range of droplet volumes.
| Item Type: | Journal article |
|---|---|
| Publication Title: | Colloids and Surfaces A - Physicochemical and Engineering Aspects |
| Creators: | McHale, G. and Newton, M.I. |
| Publisher: | Elsevier Science |
| Place of Publication: | Amsterdam |
| Date: | 2002 |
| Volume: | 206 |
| Number: | 13 |
| ISSN: | 0927-7757 |
| Identifiers: | Number Type 10.1016/S0927-7757(02)00081-X DOI |
| Rights: | © 2002 Elsevier Science B.V. All rights reserved. |
| Divisions: | Schools > School of Science and Technology |
| Record created by: | EPrints Services |
| Date Added: | 09 Oct 2015 10:15 |
| Last Modified: | 09 Jun 2017 13:23 |
| URI: | https://irep.ntu.ac.uk/id/eprint/10038 |
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