Global geometry and the equilibrium shapes of liquid drops on fibers

McHale, G. and Newton, M.I. ORCID: 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

[img]
Preview
Text
185919_3601 McHale Postprint.pdf

Download (422kB) | Preview

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:
NumberType
10.1016/S0927-7757(02)00081-XDOI
Rights: © 2002 Elsevier Science B.V. All rights reserved.
Divisions: Schools > School of Science and Technology
Depositing User: EPrints Services
Date Added: 09 Oct 2015 10:15
Last Modified: 09 Jun 2017 13:23
URI: http://irep.ntu.ac.uk/id/eprint/10038

Actions (login required)

Edit View Edit View

Views

Views per month over past year

Downloads

Downloads per month over past year