Issue
EPL
Volume 77, Number 4, February 2007
Article Number 44001
Number of page(s) 5
Section Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics
DOI http://dx.doi.org/10.1209/0295-5075/77/44001
Published online 24 January 2007
EPL, 77 (2007) 44001
DOI: 10.1209/0295-5075/77/44001

Rupture of a fluid strip under partial wetting conditions

A. G. González, J. Diez, R. Gratton and J. Gomba

Instituto de Física Arroyo Seco, Universidad Nacional del Centro de la Provincia de Buenos Aires - Pinto 399, 7000, Tandil, Argentina


received 5 July 2006; accepted in final form 11 December 2006; published February 2007
published online 24 January 2007

Abstract
We study the evolution of a long strip of viscous fluid on a horizontal glass substrate under partial-wetting conditions. This initial condition develops into an array of quasi-equidistant drops. The special feature of this dewetting scenario is that the pearling process, consisting of successive stages of bulge growth and pinching-off, does not occur simultaneously along the strip but propagates from the ends toward the strip center. We find that the footprint of each drop corresponds to two crossed elliptical shapes and report measurements of the breakup process and the dewetting dynamics.

PACS
47.20.-k - Flow instabilities.
68.15.+e - Liquid thin films.
47.15.G- - Low-Reynolds number (creeping) flows.

© Europhysics Letters Association 2007