Hovering UFO Droplets
Sushant Anand, Adam Paxson, Rajeev Dhiman, J. David Smith, Kripa K., Varanasi

TL;DR
This paper presents visual evidence of condensing droplets on lubricant-impregnated surfaces, showing UFO-like hovering behavior, and compares it with superhydrophobic surfaces through high-resolution imaging.
Contribution
It introduces a novel visualization of droplet behavior on lubricant-impregnated surfaces using SEM and specialized rig, highlighting unique hovering phenomena.
Findings
Droplets hover like UFOs on impregnated surfaces.
High-resolution SEM captures droplet behavior.
Comparison with superhydrophobic surfaces shows distinct differences.
Abstract
This fluid dynamics video is an entry for the Gallery of Fluid Motion of the 65th Annual Meeting of the APS-DFD. This video shows behavior of condensing droplets on a lubricant impregnated surface and a comparison with a superhydrophobic surface. On impregnated surfaces, drops appear like UFOs hovering over a surface. The videos were recorded in an Environmental SEM and a specially built condensation rig.
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Taxonomy
TopicsSurface Modification and Superhydrophobicity · Fluid Dynamics and Heat Transfer · Adhesion, Friction, and Surface Interactions
