Orateurs
Description
ÉTUDIANTE 8 : AZILIZ COROLLER
We have observed that surfactants deposited on liquid films can cause complex flows in confined areas. When the concentration of surfactants at an air-water interface is non-uniform, this creates a Marangoni tension, which leads to the spreading of the surfactants. In most liquids, there is a trace of endogenous surfactants at very low concentrations, due to natural contamination. These endogenous surfactants can interact with exogenous surfactants locally deposited on the interface and alter the spreading. This can lead to flows capable of solving a maze, or it can be at the origin of the Japanese art of Suminagashi. The aim of this project is to obtain experimental data to, ultimately, validate models describing the interactions between endogenous and exogenous surfactants in confined geometries.
Initially, experimental tests will be conducted to reproduce the art of Suminagashi in order to determine the key parameters. In the second phase, measurements of the spreading dynamics and the equilibrium reached over long times will be made, to compare the experimental data with existing models. The experimental study will use imaging techniques with dyes and tracers. The intern will also learn image analysis for the processing and interpretation of the results.
| Master | Mécanique |
|---|---|
| Laboratoire d'accueil | LMFA |
| Composante ou Département Composante | MECA |
