Comprehensive Analysis of Factors Leveraging Bio-Inspired Conical Designs for Efficient Fog Harvesting.

Environmental fog accumulation is a sustainable source of clean water, particularly in humid and arid regions. Many organisms have evolved passive microstructures to aid in fog droplet nucleation, accumulation, and transport. Researchers have developed various fog collectors, utilizing strategies like wire mesh, conical geometries, micronano texturing, and wettability modifications to enhance water collection.

Confined Evaporation-Mediated Enhanced Residence Time of Levitated Water Drops over Deep Oil Pools.

We observe the impact of bouncing and floating of water drops on a pool of immiscible volatile oil pools at low Weber numbers. The residence time of the impacting drop ranges from a few milliseconds to a few seconds before it sinks into the lighter oil phase. It is hypothesized that the confined evaporation from the volatile oil pool replenishes the thin film draining and results in prolonged floating and delayed sinking of drops into the oil pool.

Competitive Electrohydrodynamic and Electrosolutal Advection Arrests Evaporation Kinetics of Droplets.

This article reports the hitherto unreported phenomenon of arrested evaporation dynamics in pendant droplets because of electric field stimulus. The evaporation kinetics of pendant droplets of electrically conducting saline solutions in the presence of a transverse, alternating electric field is investigated experimentally. While the increase of field strength reduces the evaporation rate, increment in field frequency has the opposite effect.

Superhydrophobic Surface Curvature Dependence of Internal Advection Dynamics within Sessile Droplets.

Sessile droplets seated on superhydrophobic surfaces are known to exhibit internal circulation patterns. The present article experimentally demonstrates and theoretically confirms, for the very first time, that the nature and velocity of the internal circulation in sessile droplets seated on superhydrophobic surfaces are strongly governed by the curvature of the surface and its directionality. Sessile droplets were rested on concave and convex superhydrophobic surfaces, and both with one curvature (cylindrical) and two curvatures (spherical) and varying droplet diameter to curve diameters were studied.