How a laser-pulse propels, deforms and fragments a liquid drop
Orateur : Hanneke Gerbeldom
POF, University of Twente, The Netherlands.
Résumé : The deposition of laser energy in a superficial layer of an unconfined liquid drop leads to propulsion, strong deformation and eventually fragmentation of the drop. We reveal the detailed drop dynamics by combining high-speed and stroboscopic imaging with analytical modelling. We show that the drop motion results from the recoil momentum transferred to the drop by water vaporization and explain how the drop shape can be manipulated by tuning the laser-pulse energy, shape and focus. Furthermore, we investigate how instabilities and holes develop on the deforming drop, which eventually result in its fragmentation.
Date et lieu : le Vendredi 8 Avril 2016 à 11h, salle 250, IUSTI