Marangoni-driven dynamics of a volatile droplet on the liquid layer

Conference: MEMAT 2022 - 2nd International Conference on Mechanical Engineering, Intelligent Manufacturing and Automation Technology
01/07/2022 - 01/09/2022 at Guilin, China

Proceedings: MEMAT 2022

Pages: 4Language: englishTyp: PDF

Authors:
Li, Lincong; Liu, Ruxu; Wang, Chenghao; Xiong, Heming; Chen, Xue (School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin, China)

Abstract:
The dynamics of a volatile droplet on the liquid layer are widely used in nature and industry, but the mechanisms of spreading and evaporation in such a system are still lacking. We investigate the Marangoni-driven dynamic of a dripping mixture IPA droplet on the oil layer. The volatile drop spreads and spontaneously fragments into a myriad of submillimetric droplets from the periphery of the mother drop. By considering the balance of viscous stress and tangential stresses, characteristic radius and time is a power law with oil layer height and initial droplet volume. We further perform experiments to demonstrate their relations. Our results provide important missing pieces to the rich mechanisms of the Marangoni effect.