scholarly journals Apparent Contact Angle of Droplets on Liquid Infused Surfaces: Geometric Interpretation

Soft Matter ◽  
2021 ◽  
Author(s):  
Ciro Semprebon ◽  
Muhammad Subkhi Sadullah ◽  
Glen McHale ◽  
Halim Kusumaatmaja
Keyword(s):  
Contact Angle ◽  
Relative Size ◽  
Geometric Interpretation ◽  
Apparent Contact Angle

We theoretically investigate the apparent contact angle of droplets on liquid infused surfaces as a function of the relative size of the wetting ridge and the deposited droplet. We provide...

scholarly journals Apparent contact angle and contact angle hysteresis on liquid infused surfaces

Soft Matter ◽  
2017 ◽  
Vol 13 (1) ◽  
pp. 101-110 ◽  
Author(s):  
Ciro Semprebon ◽  
Glen McHale ◽  
Halim Kusumaatmaja
Keyword(s):  
Contact Angle ◽  
Contact Angle Hysteresis ◽  
Strong Dependence ◽  
Relative Size ◽  
Apparent Contact Angle

The apparent contact angle and contact angle hysteresis of a droplet on liquid infused surfaces have strong dependence on the relative size between the droplet and its surrounding wetting ridge.

scholarly journals Interfacial Behaviour in Ferroalloys: The Influence of Sulfur in FeMn and SiMn Systems

2021 ◽  
Author(s):  
Sergey Bublik ◽  
Sarina Bao ◽  
Merete Tangstad ◽  
Kristian Etienne Einarsrud
Keyword(s):  
Contact Angle ◽  
Interfacial Tension ◽  
Sessile Drop ◽  
Interfacial Properties ◽  
Apparent Contact Angle ◽  
Holding Time ◽  
Transfer Rates ◽  
Experimental Parameters ◽  
Interfacial Behaviour ◽  
Modelling Approach

AbstractThe present study has investigated the influence of sulfur content in synthetic FeMn and SiMn from 0 to 1.00 wt pct on interfacial properties between these ferroalloys and slags. The effect of experimental parameters such as temperature and holding time was evaluated. Interfacial interaction between ferroalloys and slags was characterized by interfacial tension and apparent contact angle between metal and slag, measured based on the Young–Laplace equation and an inverse modelling approach developed in OpenFOAM. The results show that sulfur has a significant influence on both interfacial tension and apparent contact angle, decreasing both values and promoting the formation of a metal-slag mixture. Despite the fact that sulfur was added only to the ferroalloys, most of sulfur is distributed into slag after reactions with the metal phase. Increasing the maximum experimental temperature in the sessile drop furnace also resulted in a decrease of both interfacial properties, resulting in higher mass transfer rates and intensive reactions between metal and slag. The effect of holding time demonstrated that after reaching equilibrium in FeMn-slag and SiMn-slag systems (both with and without sulfur), interfacial tension and apparent contact angle remain constant.

scholarly journals Relaxation of a dewetting contact line. Part 1. A full-scale hydrodynamic calculation

2007 ◽  
Vol 579 ◽  
pp. 63-83 ◽  
Author(s):  
JACCO H. SNOEIJER ◽  
BRUNO ANDREOTTI ◽  
GILES DELON ◽  
MARC FERMIGIER
Keyword(s):  
Contact Angle ◽  
Contact Line ◽  
Apparent Contact Angle ◽  
Universal Relation ◽  
Contact Lines ◽  
Viscous Effects ◽  
Solid Plate ◽  
Static Approach ◽  
Critical Capillary Number ◽  
Wetting Liquid

The relaxation of a dewetting contact line is investigated theoretically in the so-called ‘Landau–Levich’ geometry in which a vertical solid plate is withdrawn from a bath of partially wetting liquid. The study is performed in the framework of lubrication theory, in which the hydrodynamics is resolved at all length scales (from molecular to macroscopic). We investigate the bifurcation diagram for unperturbed contact lines, which turns out to be more complex than expected from simplified ‘quasi-static’ theories based upon an apparent contact angle. Linear stability analysis reveals that below the critical capillary number of entrainment, Cac, the contact line is linearly stable at all wavenumbers. Away from the critical point, the dispersion relation has an asymptotic behaviour σ∝|q| and compares well to a quasi-static approach. Approaching Cac, however, a different mechanism takes over and the dispersion evolves from ∼|q| to the more common ∼q2. These findings imply that contact lines cannot be described using a universal relation between speed and apparent contact angle, but viscous effects have to be treated explicitly.

Theoretical Study of Wetting Transformation on Regularly Hexagonal Array of Copper Surface

2014 ◽  
Vol 621 ◽  
pp. 56-60
Author(s):  
Guang Rui Shang ◽  
Qing Cheng Wang ◽  
Xiao Dong Yang
Keyword(s):  
Contact Angle ◽  
Theoretical Study ◽  
Hydrophobic Surface ◽  
Copper Surface ◽  
Apparent Contact Angle ◽  
Hexagonal Array

In this thesis we provide the electrodeposition technology by means of monolayer templates for fabricating regularly hexagonal array of copper surface, predict the wetting transformation in theory. We report the result that original hydrophilic copper surface may turn to be hydrophobic surface by this kind of structurization. The apparent contact angle would convert from less thanto more than.

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