title: Droplets climbing a rotating helical fiber.
abstract: A liquid droplet is placed on a rotating helical fiber. We find that the droplet may slide down, attach or climb up the fiber. We inspect experimentally the domain of existence of these three behaviors as a function of the geometrical characteristics of the fiber, its angle relatively to the horizontal, the wetting properties of the fluid and the rotating speed of the helix. A theoretical model is proposed in order to capture the boundaries of the experimental phase diagram.
authors.affiliation: GRASP, Physics Dept., University of Liège, B4000, Liège, Belgium. baptiste.darboistexier@gmail.com.
authors.forename: B
authors.initials: B
authors.lastname: Darbois Texier
authors.affiliation: GRASP, Physics Dept., University of Liège, B4000, Liège, Belgium. S.Dorbolo@ulg.ac.be.
authors.forename: S
authors.initials: S
authors.lastname: Dorbolo
keywords: Soft Matter: Interfacial Phenomena and Nanostructured Surfaces