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Capillary droplet propulsion on a fibre

Title data

Haefner, Sabrina ; Bäumchen, Oliver ; Jacobs, Karin:
Capillary droplet propulsion on a fibre.
In: Soft Matter. Vol. 11 (June 2015) Issue 35 . - pp. 6921-6926.
ISSN 1744-6848
DOI: https://doi.org/10.1039/C5SM01228G

Abstract in another language

A viscous liquid film coating a fibre becomes unstable and decays into droplets due to the Rayleigh–Plateau instability (RPI). Here, we report on the generation of uniform droplets on a hydrophobized fibre by taking advantage of this effect. In the late stages of liquid column breakup, a three-phase contact line can be formed at one side of the droplet by spontaneous rupture of the thinning film. The resulting capillary imbalance leads to droplet propulsion along the fibre. We study the dynamics and the dewetting speed of the droplet as a function of molecular weight as well as temperature and compare to a force balance model based on purely viscous dissipation.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics V
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics V > Chair Experimental Physics V - Univ.-Prof. Dr. Oliver Bäumchen
Result of work at the UBT: No
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 15 Oct 2020 11:02
Last Modified: 28 Oct 2020 11:45
URI: https://eref.uni-bayreuth.de/id/eprint/58374