| Issue |
EPL
Volume 139, Number 4, August 2022
|
|
|---|---|---|
| Article Number | 43001 | |
| Number of page(s) | 7 | |
| Section | Fluid and nonlinear dynamics | |
| DOI | https://doi.org/10.1209/0295-5075/ac6a06 | |
| Published online | 17 August 2022 | |
Evaporation of liquid coating a fiber
1 Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides - 91405, Orsay, France
2 Université de Paris, Laboratoire Matière et Systèmes Complexes, UMR 7057 CNRS - F-75013 Paris, France
(a) francois.boulogne@cnrs.fr (corresponding author)
Received: 6 January 2022
Accepted: 25 April 2022
We investigate theoretically and numerically the diffusion-limited evaporation of a liquid deposited on a fiber in two configurations: a sleeve and an axisymmetric barrel-shaped droplet. For a sleeve, the local flux depends on both the aspect ratio and the smallest length of the problem. By using analytical calculations and 3D finite elements simulations, we predict a divergence of this flux further localized at the edge as the aspect ratio increases. The evaporation of axisymmetric drops on a fiber is studied with numerical simulations. For sufficiently large volumes, we evidence that the evaporation rate is almost independent of the wetting properties of the liquid, even for small contact angles, and that the droplets evaporate as spheres of the same volume.
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