Contact angle hysteresis: surface morphology effects

Moradi, Sona; Englezos, Peter; Hatzikiriakos, Savvas G.

doi:10.1007/s00396-012-2746-3

Cited by 30 publications

(30 citation statements)

References 29 publications

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“…However, contact line movement and CAH are highly depended upon the arrangement of wetting components. Moradi et al [11] examined effect of geometry on spreading and CAH. They modeled the surface as parabolic cones, and modeled the spread of a drop on a surface, depending on geometries of the cones.…”

Section: Introductionmentioning

confidence: 99%

“…Johnson [16] first explained the relationship between CAH and surface roughness. Over the past decade, experiments have advanced the understanding of the relationship between CAH and surface structure [11,23,25,26]. For example, in experimental studies, micro-structured surfaces are often fabricated using known contact angles on flat surfaces [25].…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, various theoretical and experimental approaches have enabled the investigation of droplet shapes and behavior on different surfaces. Advances in nanomaterials research have provided scientists and engineers with a handle to study superhydrophobicity and other interesting wetting properties [1][2][3][4][5][6][7][8][9][10][11][12][13]. Non-homogeneous surfaces are often presented in studies of super-hydrophobic surfaces and other complex morphologies that produce complex wetting characteristics.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical consideration of contact angle hysteresis using surface-energy-minimization methods

Cheng

Naccarato

Kumar

2016

International Journal of Heat and Mass Transfer

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a b s t r a c tIn recent years, advances in coating manufacturing processes have allowed wetting characteristics of a surface to be tuned with micro/nano morphologies. Today, complex surface geometries can be created with various surface treatment methods. These advances can be implemented in phase-change heattransfer applications, such as condensation, which relies on droplet behavior on a surface. Therefore, it is important to gain a fundamental understanding of wetting characteristics of textured surfaces having different geometrical configurations. This can be accomplished by studying the behavior of a single droplet on a given surface. Drop shapes and behaviors are affected by surface energies of different interfacial surfaces and surface morphologies. Contact angle hysteresis (CAH) -which is the difference between advancing and receding angles -can be estimated by utilizing concepts of surface-energy minimization. This is essential in heat transfer applications, as parameters such as drop size and distribution in condensation heat transfer are determined by CAH. In this study, a mathematical model has been developed to estimate CAH on different surface geometries and degrees of wetting. Modeling results suggest that CAH increases with increasing degree of wetting. Further, CAH remains low at both high and low droplet contact angles, whether the surface is hydrophilic or hydrophobic.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Theoretical consideration of contact angle hysteresis using surface-energy-minimization methods

Cheng

Naccarato

Kumar

2016

International Journal of Heat and Mass Transfer

View full text Add to dashboard Cite

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“…Ultra-short pulsed laser ablation is an accurate and effective method to produce controlled roughness on the surface of metallic and polymeric materials [17][18][19][20]26]. The main advantage of using ultra-short pulse laser (such as femtosecond laser) is the negligible heat conduction produced during laser irradiation and the minimized energy loss into the sample.…”

Section: Introductionmentioning

confidence: 99%

“…Superhydrophobic surfaces are made up from a great variety of materials such as metals, inorganic, and organic compounds [14,[16][17][18][19][20]. Polymers are versatile and cost-effective materials easy to manufacture and typically possess low surface energies suitable to develop superhydrophobic surfaces for manufacturing smart materials and biomaterials [14][15][16][21][22][23].…”

Section: Introductionmentioning

confidence: 99%