Self-propelled dropwise condensation on a gradient surface

Shedding of a condensing droplet from beetle-inspired bumps

“…The wetting characteristics of the surface are achieved by computing a specific adhesion force between the gas/liquid phase and solid walls as explained by Benzi et al [19]. In the past, the LBM has been successfully used for condensation related problems [20,21]. Dupuis and Yeomans [22] employed LBM to investigate droplet condensation on Beetle inspired bumps and found that chemical patterning on the beetle's back is important for water droplet formation.…”

Surface Evolver Simulation of Droplet Wetting Morphologies on Fiber Without Gravity

“…Understanding the behavior of fine droplets on fiber is important for many engineering applications such as condensation heat transfer (Deng et al, 2017;Preston et al, 2018;Adera et al, 2020), gas-liquid separation (Zhang et al, 2018;Abishek et al, 2019), dyeing of textiles (Wu et al, 2010), surface wetting (Wang et al, 2018), and water collection (Gao et al, 2021). The studies on fine droplet behaviors can provide useful information for those industry processes.…”

“…To date, the adhesion morphologies of droplets on single fiber have been extensively investigated by mathematic model (Carroll, 1976;Lu et al, 2016), numerical simulation (Mchale et al, 2001;Chen et al, 2015;Deng et al, 2017;Chen and Deng, 2017), and experimental test (Gilet et al, 2010;Fang et al, 2015;Amrei et al, 2017). The adhesion morphologies of droplets-on-fiber depend on fiber diameter, wettability of fiber surface, volume of droplet, and surface tension of droplet.…”

Condensation of Humid Air on Superhydrophobic Surfaces: Effect of Nanocoatings on a Hierarchical Interface

“…28 Recent studies showed an enhancement in heat-transfer performance on hybrid surfaces such as microgrooved surfaces, 33−35 millimetric-sized grooves, 36 surfaces with geometric or thermal discontinuities, 37 and heterogeneous surfaces with a wettability gradient. 38,39 The incorporation of hydrophilic/superhydrophilic patches is a promising approach to reducing the nucleation energy barrier on the superhydrophobic/hydrophobic surface. 40,41 The optimized design of a wettability-patterned surface with hydrophilic/ superhydrophilic patches can show substantially higher condensation performance than the homogeneous surface due to enhanced drop nucleation and drop drainage.…”

“…A hierarchical superhydrophobic surface comprising three-dimensional nanowired networks showed stable and efficient droplet jumping at a larger subcooling of up to 28 K in a pure steam environment . Recent studies showed an enhancement in heat-transfer performance on hybrid surfaces such as microgrooved surfaces, − millimetric-sized grooves, surfaces with geometric or thermal discontinuities, and heterogeneous surfaces with a wettability gradient. , The incorporation of hydrophilic/superhydrophilic patches is a promising approach to reducing the nucleation energy barrier on the superhydrophobic/hydrophobic surface. , The optimized design of a wettability-patterned surface with hydrophilic/superhydrophilic patches can show substantially higher condensation performance than the homogeneous surface due to enhanced drop nucleation and drop drainage. − In another study, a vertical hydrophilic surface with hydrophobic bumps showed an enhancement in condensation performance, owing to the droplet falling from the hydrophobic bumps, which results in the disturbance of the NCG layer …”