Deformation of a free interface pierced by a tilted cylinder
1 Laboratoire de Physique de la Matière Condensée, CNRS UMR 7336, Université de Nice Sophia-Antipolis 06108 Nice, France, EU
2 Institute of Mathematics and Physics, Aberystwyth University - Ceredigion SY23 3BZ, UK, EU
Received: 6 March 2012
Accepted: 20 June 2012
We investigate the interaction between an infinite cylinder and a free fluid-fluid interface governed only by its surface tension. We study the deformation of an initially flat interface when it is deformed by the presence of a cylindrical object, tilted at an arbitrary angle, that the interface “totally wets”. Our simulations predict all significant quantities such as the interface shape, the position of the contact line, and the force exerted by the interface on the cylinder. These results are compared with an experimental study of the penetration of a soap film by a cylindrical liquid jet. This dynamic situation exhibits all the characteristics of a totally wetting interface. We show that whatever the inclination, the force is always perpendicular to the plane of the interface, and its amplitude diverges as the inclination angle increases. Such results should bring new insights in both fluid and solid mechanics, from animal locomotion to surface micro-processing.
PACS: 47.55.-t – Multiphase and stratified flows / 47.15.-x – Laminar flows / 68.03.-g – Gas-liquid and vacuum-liquid interfaces
© EPLA, 2012