arXiv subjects

J. Teisseire

Publications and source records attributed to J. Teisseire.

3 recordsLinked to original sources

arXiv2022

Triple line destabilization -- Tuning film thickness through meniscus curvature

For partially wetting fluids, previous results suggest that the thickness and the dewetting velocity of gravity driven films are uniquely determined by the triple line dynamics. In contrast, when flushing aqueous liquids through polymer tubes, our measurements show that the dewetting velocity and thickness can be selected. The control parameter is pressure, i.e. the macroscopic curvature of the meniscus. Our results demonstrate directly the major role played by the macroscopic geometry in the stability of the triple line in a dynamic meniscus as predicted by Eggers (Phys. Rev. Lett. 93, 094502 (2004)).

cond-mat.soft↗

arXiv2018

Drop impact dynamics on slippery liquid-infused porous surfaces: influence of oil thickness

Slippery liquid-infused porous surfaces (SLIPS) are porous nanostructures impregnated with a low surface tension lubricant. They have recently shown great promise in various applications that require non-wettable superhydrophobic surfaces. In this paper, we investigate experimentally the influence of the oil thickness on the wetting properties and drop impact dynamics of new SLIPS. By tuning the thickness of the oil layer deposited through spin-coating, we show that a sufficiently thick layer of oil is necessary to avoid dewetting spots on the porous nanostructure and thus increasing the homogeneity of the liquid distribution. Drop impact on these surfaces is investigated with a particular emphasis on the spreading and rebound dynamics when varying the oil thickness and the Weber number.

cond-mat.soft↗

arXiv2017

Predicting changes in visual appearance of periodic surface from brdf measurements

The present study focuses on the optical properties of functionalized surfaces and how the surface geometry impacts them. Physical measurements of reflected light are required to understand the visual aspect of such surfaces. Bidirectional Reflection Distribution Function (BRDF) is evaluated in order to identify and understand physical effects induced by different surface functionalization. BRDF measurements of high angular resolution allow us to observe diffraction phenomenon at an unusual scale. Experimental results were compared to theoretical calculation, and then diffraction effect was confirmed. This study stresses that diffractive phenomenon could have an impact on visual aspect even for simple pattern geometry. In the same way, if more complex periodic patterns are considered, as multistate periodicity pattern for example, it could rise to important modification of surface visual aspect.

cond-mat.mtrl-sci↗