ESPCI & Ecole polytechnique
A liquid moving on a solid in a non-wetting situation undergoes very special dynamics, owing to the extremely low friction generated in these situations. We plan to describe such special cases. We describe in particular the strategies of the water spider Argyroneta, which takes advantage of its super-hydrophobic abdomen to build air bells underwater. We also describe dynamics in the Leidenfrost situation, where evaporation can be exploited to create self-propulsion, if some asymmetry is present in the system.