简介: |
Abstract：
Drop impact on solid surfaces, aside from its inherent beauty, plays an important role in industrial processes as diverse as ink-jet printing, spray cooling, and spray coating. The impacting drop deforms before making contact with the target surface, and an air layer is formed between the droplet base and the solid surface. Using high-speed color interferometry, we study the dynamics of the air layer, the wetting mechanism and bubble entrapment. When a liquid droplet impacts on a surface heated above the liquid's boiling point, the droplet either immediately boils when it contacts the surfaces (contact boiling), or without any surface contact forms a Leidenfrost vapor layer towards the hot surface and bounces back (film boiling). We investigate how the boiling dynamics of the impacting droplet change with impact inertia and substrate properties.
主讲人简介：
Prof. Chao Sun completed his PhD at the Chinese University of Hong Kong in 2006, and received the Hong Kong Young Scientist award in the same year. Now he is a tenured Associate Professor of Faculty of Science and Technology, University of Twente from 2013. He will soon join the Center of Combustion Energy at Tsinghua University.
Until now he has published more than 60 journal papers including JFM, PRL, Nature Commun., and 1 paper to be published in Annu. Rev. Fluid Mech. Because of his creative research, he was granted the NWO-VIDI award from the Dutch Science Foundation in 2014.
Prof. Sun’s research interests include high-Reynolds number turbulence, bubbles and droplets, and multiphase flows. |
