| Issue |
EPJ Web Conf.
Volume 140, 2017
Powders and Grains 2017 – 8th International Conference on Micromechanics on Granular Media
|
|
|---|---|---|
| Article Number | 09035 | |
| Number of page(s) | 4 | |
| Section | Fluids and particles | |
| DOI | https://doi.org/10.1051/epjconf/201714009035 | |
| Published online | 30 June 2017 | |
https://doi.org/10.1051/epjconf/201714009035
Dynamics of wetting explored with inkjet printing
Experimentalphysik V, University of Bayreuth, 95440 Bayreuth, Germany
* e-mail: simeon.voelkel@uni-bayreuth.de
** e-mail: kai.huang@uni-bayreuth.de
Published online: 30 June 2017
An inkjet printer head, which is capable of depositing liquid droplets with a resolution of 22 picoliters and high repeatability, is employed to investigate the wetting dynamics of drops printed on a horizontal plane as well as on a granular monolayer. For a sessile drop on a horizontal plane, we characterize the contact angle hysteresis, drop volume and contact line dynamics from side view images. We show that the evaporation rate scales with the dimension of the contact line instead of the surface area of the drop. We demonstrate that the system evolves into a closed cycle upon repeating the depositing-evaporating process, owing to the high repeatability of the printing facility. Finally, we extend the investigation to a granular monolayer in order to explore the interplay between liquid deposition and granular particles.
© The Authors, published by EDP Sciences, 2017
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