A Qualitative Inter-Relation between Drop Impacts on a Solid Surface and the Interaction of a Droplet Placed inside a Superheated Pool

Ashish Karn; Rohan De; Abhay Kumar

Authors

Ashish Karn Department of Mechanical Engineering, School of Engineering, University of Petroleum and Energy Studies, Energy Acres, Bidholi, Dehradun, Uttarakhand, 248007, India
Rohan De Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN, 55414, USA
Abhay Kumar Department of Mechanical Engineering, School of Engineering, University of Petroleum and Energy Studies, Energy Acres, Bidholi, Dehradun, Uttarakhand, 248007, India

Keywords:

Drop impact, Vapor explosions, High speed imaging, Splashing, Crown formation

Abstract

The phenomenon of drop impacts on a solid surface and the interaction of a cold droplet with a superheated liquid pool are both of great relevance in many practical and engineering situations.Most of the reported research in the literature on these phenomena focus on the impact of a droplet on a solid surface or a liquid surface and there are hardly any study on the interaction of a stationary cold droplet inside a hot pool of liquid, a phenomenon observed quite often. This study reports high speed flow visualization of a drop impact on a Teflon-coated solid surface at different liquid properties and impact Reynolds number. Simultaneously, high speed imaging of the interaction of a cold dropletwith the superheated olive oil pool has also been carried out. The images show a striking resemblance between the flow dynamics of the two phenomena. A comparison between the two phenomena is made and suggestions are made for the possible underlying physics.