Evaporation of a sessile oil drop in the Wenzel-like regime

Khilifi, Dorra; Foudhil, Walid; Harmand, Souad; Jabrallah, Sadok Ben

doi:10.1016/j.ijthermalsci.2019.106236

Cited by 10 publications

(7 citation statements)

References 23 publications

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“…It shows that when Wenzel model is applied, r > 1, the morphology of the surface always magnifies the underlying wetting properties. θ w is larger than θ 0 for the hydrophobic material (θ 0 > 90°); and it is smaller than θ for the hydrophilic material (θ 0 < 90°) [10][11][12].…”

Section: Effect Of Surface Roughness On Contact Anglementioning

confidence: 86%

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Wettability on Different Surfaces

Kwok¹

2020

21st Century Surface Science - A Handbook

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Wettability has been explored for 100 years since it is described by Young’s equation in 1805. It is all known that hydrophilicity means contact angle (θ), θ < 90°; hydrophobicity means contact angle (θ), θ > 90°. The utilization of both hydrophilic surfaces and hydrophobic surfaces has also been achieved in both academic and practical perspectives. In order to understand the wettability of a droplet distributed on the textured surfaces, the relevant models are reviewed along with understanding the formation of contact angle and how it is affected by the roughness of the textured surface aiming to obtain the required surface without considering whether the original material is hydrophilic or hydrophobic.

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Section: Effect Of Surface Roughness On Contact Anglementioning

confidence: 86%

“…ds sl (11) With a variation of the profile of the droplet, the amount of energy transited among the interfaces is changed:…”

Section: Cassie-baxter Modelmentioning

confidence: 99%

Wettability on Different Surfaces

Kwok¹

2020

21st Century Surface Science - A Handbook

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“…Paxson et al 35 utilized the anisotropic nanostructured surface to control the adhesion/release of the three‐phase line to manipulate the droplet geometries. The hexagonal wetting was made with the silicon oil droplets on the hexagonally arranged micron‐sized circular holes substrate 36 . Tekidou et al 37 deposited ethanol droplets on the square and cylindrical micropillar perflourodecyltrichlorosilane surfaces and formed the pseudo‐octagonal wetting film.…”

Section: Introductionmentioning

confidence: 99%

“…The hexagonal wetting was made with the silicon oil droplets on the hexagonally arranged micronsized circular holes substrate. 36 Tekidou et al 37 deposited ethanol droplets on the square and cylindrical micropillar perflourodecyltrichlorosilane surfaces and formed the pseudo-octagonal wetting film. Courbin et al 38 investigated the effect of a droplet contact angle on the patterned substrates and formed different wetting patterns such as octagon, square, and hexagon using various liquids (ethanol, isopropanol, hexane, and silicone oil) on the substrates patterned with the different types of micropillars.…”

Section: Introductionmentioning

confidence: 99%

Evaporation‐driven octagonal particle deposition on the patterned substrate

Lim

Ren

Ong

et al. 2022

Droplet

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Understanding noncircular deposition patterns can offer broad applications; however, the phenomena have not been thoroughly studied. We experimentally investigate particle self-assembly of microspherical polystyrene particle-laden sessile droplets dried on a micropyramid cavity substrate. The particle sizes and concentrations in the droplets are found to modify the inner particle deposition with the octagonal perimeter. The droplets with mass concentrations of 0.5% and higher evaporate with the pinned contact lines. The capillary flow flushes the 3 µm particles to the contact line and creates octagonal outer-ring patterns. The 10 µm particles are more evenly distributed in the depositions of the dried droplets. However, at a high mass concentration of 2.6%, the particles adsorbed at the droplet liquid-air interface form an agglomerate and deposit toward the centerline, leading to the crater-shaped pattern. Higher concentrations provoke the thicker octagonal outer-ring depositions regardless of the particle sizes in the droplets. The findings could inspire applications to control noncircular wetting and drying of particle-laden sessile droplets.

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“…Small scale structures added to otherwise smooth surface of the same chemical composition influence the wettability [1,2]. Adapting structure geometry may enhance water drop evaporation [3] or coalescence [4,5]. Here we concentrate our attention on structures that cause spontaneous water wicking in a privileged direction as observed on the skin of organisms living in arid areas [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Geometrically driven liquid wicking: numerical study and experimental validation

Abbaspour

Beltrame

Néel

et al. 2020

Eur. Phys. J. Appl. Phys.

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Liquid film or drop wicking on solid surface without any external energy input is highly desirable in specific industrial processes. This paper proposes a numerical study of the dynamics of liquid wicking on geometrically structured flat surface. We consider structures deduced from flat surface by super-imposing a series of identical parallel channels, the ensemble being made of the same material. Channels exhibit arrow-shaped patterns. We analyse drop wicking on such a structure using numerical simulation and experiment. Both approaches reveal non symmetric wicking clearly exhibiting a privileged direction. The simulation captures the evolution of the liquid/air interface at smaller time scales and reveals wicking with rapid pulses suggested by the experiment.

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Evaporation of a sessile oil drop in the Wenzel-like regime

Cited by 10 publications

References 23 publications

Wettability on Different Surfaces

Wettability on Different Surfaces

Evaporation‐driven octagonal particle deposition on the patterned substrate

Geometrically driven liquid wicking: numerical study and experimental validation

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