Impact of a compound drop on a solid surface
报告人：Prof. Marie-Jean Thoraval
The impact of a drop has many applications from combustion to the spreading of crops diseases or three-dimensional printing. This fundamental phenomenon has therefore attracted a lot of interest from different fields. However, most studies have focused on the case of a drop containing only one fluid. Many applications involve complex liquids such as dispersions or emulsions. When a second immiscible phase is added into the drop, some more complex dynamics emerge. We will consider the simplest geometries where either a bubble, a particle or another immiscible liquid drop are added inside the impacting drop. They can produce a new type of vertical splashing during the impact. We will investigate the conditions under which splashing is observed and propose some physical models to explain these vertical dynamics.
Professor Marie-Jean Thoraval obtained his Master degrees from Ecole Polytechnique (Paris, France) in 2007 and Supaéro (Toulouse, France) in 2008. He then pursued his PhD in Fluid Mechanics with Professor Sigurdur T. Thoroddsen in King Abdullah University of Science and Technology (KAUST, Jeddah, Saudi Arabia), from where he graduated in 2013. From 2013 to 2015, he worked as a postdoctoral researcher at the Physics of Fluids group in the University of Twente (The Netherlands), with Professor Jacco Snoeijer, Professor Frits Dijksman and Professor Detlef Lohse. Since September 2015, he is Professor at Xi'an Jiaotong University (http://gr.xjtu.edu.cn/web/mjthoraval).
His research focuses on interfacial flows, including drops and bubbles, combining the fastest high-speed cameras together with large parallel numerical simulations. His research has been published in top journals such as Physical Review Letters, Journal of Fluid Mechanics and Physical Review E. His results have been highlighted in three cover images of Journal of Fluid Mechanics and have recently received the 2018 Best Scientific Award of the Photron Slow Motion Video Award.