Contact angle and impinging process of droplets on partially grooved hydrophobic surfaces

Song, Dong; Song, Baowei; Hu, Haibao; Du, Xiaosong; Ma, Zhibo

doi:10.1016/j.applthermaleng.2015.03.071

Cited by 39 publications

(14 citation statements)

References 44 publications

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“…Water spray application in air conditioning [2], fire suppression [3][4][5][6][7], gas cooling [8,9] and agricultural irrigation systems [10,11] can be considered as traditional. Heat and mass transfer processes are applied for surface treatment [12][13][14] and protection [15][16][17][18], cooling towers [19][20][21]9,22], washing processes [23][24][25], water freezing and crystallization [26][27][28], aerosols [29,30], gas turbines [31][32][33][34][35], heat recovery from humid flue gas [36,37], NO x reduction in fuel combustion [38][39][40], water and fuel emulsions [41][42][43][44], plasma technique [45][46][47] and other thermal technologies. Wide water spraying application practice defi...…”

Section: Introductionmentioning

confidence: 99%

Peculiarities of the transit phase transformation regime for water droplets that are slipping in humid gas

Miliauskas

Maziukienė

Ramanauskas

2016

International Journal of Heat and Mass Transfer

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Section: Introductionmentioning

confidence: 99%

Peculiarities of the transit phase transformation regime for water droplets that are slipping in humid gas

Miliauskas

Maziukienė

Ramanauskas

2016

International Journal of Heat and Mass Transfer

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“…The precision of micro-machining can reach micrometer-scale, with nanometer-scale surface finish. Song et al [14] fabricated partially grooved hydrophobic surfaces and results showed that the apparent contact angle parallel to the grooves is larger than that on smooth surface, while the micro-structures have little effect on contact angle in vertical direction. It can be seen that the anisotropic effect of the micro-structures would be more significant by increasing the fraction of the grooved area.…”

Section: Page 3 Of 21mentioning

confidence: 99%

Prediction of contact angle for hydrophobic surface fabricated with micro-machining based on minimum Gibbs free energy

Shi

Liu

Song

et al. 2016

Applied Surface Science

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Abstract:When an interface exists between a liquid and a solid, the angle between the surface of the liquid and the outline of the contact surface is described as the contact angle. The size of the contact angle is the metrics of the hydrophobicity of the surface. The prediction of the contact angle has significant effect on the design of hydrophobic surface and improvement of hydrophobicity. In this paper, a prediction model for contact angle has been proposed based on minimum Gibbs free energy. It considers the effects of unilateral force and area constraints of the droplets. The effect of micro-structural parameters on contact angle has also been investigated.Micro-milling experiments have been conducted to fabricate the hydrophobic surface in order to validate the predictive capability of the contact angle model. Results revealed that the established prediction model could estimate the contact angle of hydrophobic surface. The contact angle could be increased by increasing concave width or reducing convex. The outcome of this research will lead to new methodologies for preparing hydrophobic surfaces with micro-machining technology.

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“…The measurement results indicated a decrease in the contact angles of the hydrophilic silicon wafer and the polished silicon wafer, whereas the contact angles of the other three surfaces were relatively larger. For micro-grooved surfaces, Song et al [24] observed a larger apparent contact angle parallel to the grooves as compared to that of the smooth surface, and the microstructures exhibited a minimal effect on the contact angle perpendicular to the grooves. An increase in the grooved area and the surface energy resulted in a more anisotropic droplet.…”

Section: Introductionmentioning

confidence: 99%

The Wettability and Numerical Model of Different Silicon Microstructural Surfaces

Han

Yang²,

et al. 2019

Applied Sciences

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Wettability is an important property of solid surfaces and is widely used in many industries. In this work, seven silicon microstructure surfaces were made by plasma immersion ion implantation (PIII) technology. The experimental contact angles and theoretical contact angles of various surfaces were compared, which indicated that the classical theory had great limitations in predicting the static contact angles of complex structures. A parameterized microstructure surface was established by computational fluid dynamics (CFD) with a volume-of-fluid (VOF) model to analyze the reasons for the differences between experimental and theoretical contact angles. Comparing the results of experiments and simulations, it was found that the VOF model can simulate the contact angle of these surfaces very well. The geometrical models of the different microstructures were simplified, and waveforms of the surfaces were obtained.

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Contact angle and impinging process of droplets on partially grooved hydrophobic surfaces

Cited by 39 publications

References 44 publications

Peculiarities of the transit phase transformation regime for water droplets that are slipping in humid gas

Peculiarities of the transit phase transformation regime for water droplets that are slipping in humid gas

Prediction of contact angle for hydrophobic surface fabricated with micro-machining based on minimum Gibbs free energy

The Wettability and Numerical Model of Different Silicon Microstructural Surfaces

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