Results 251 to 260 of about 3,262,089 (280)

Prediction of static contact angles on the basis of molecular forces and adsorption data

Physical Review E, 2016
At a three-phase contact line, a liquid bulk phase is in contact with and coexists with a very thin layer of adsorbed molecules. This adsorbed film in the immediate vicinity of a liquid wedge modifies the balance of forces between the liquid and solid phases such that, when included in the balance of forces, a quantitative relationship emerges between ...
M Elena, Diaz, Michael D, Savage, Ramon L, Cerro   +2 more
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Effect of Camera Parallax Angle on the Accuracy of Static Contact Angle Measurements

Langmuir
Measuring the contact angle at the solid/liquid/vapor triple point in sessile drop experiments is one of the most popular and simple ways to quantify the wettability of surfaces and determine the surface free energy. Despite decades of technical advancements in contact angle measurements, which allowed for improving the precision of sessile drop ...
Owen M. Johnson, Filippo Mangolini
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Research on the Prediction of Static Contact Angle in Circular Capillary Tubes

Applied Mechanics and Materials, 2012
New discovery was found by the capillary experiments with circular glass tubes and partial-wetting liquids that the partial liquid volume under moon surface could be expressed by equivalent height function H(r). Contact angle models suggested in this work, evaluated by Eq.
Jun Biao Wang, Dong Zi Zeng, Jian Jun Jiang   +2 more
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Comparison of static contact angle change and relaxation in EWOD devices

2009 Spanish Conference on Electron Devices, 2009
In conventional Electrowetting on Dielectric (EWOD) devices a static change of the contact angle is observed when a voltage is applied to the electrodes, usually correlated to the Lippmann equation. In this paper we analyze the contact angle changes by using two different dielectrics of different materials and thicknesses and also comparing two ...
Vito di Virgilio, Luis Castaner
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Fuzzy based models for estimating static contact angle and sliding angle of liquid drops

Progress in Organic Coatings, 2018
Abstract Prediction of the contact angles and sliding angles of liquid drops is so difficult, because the interaction among the variables, which have impact on the angles, is so complex. Therefore, in this paper fuzzy logic was used to develop prediction models.
Naser Valipour Motlagh, Mehran Taghipour-Gorjikolaie   +1 more
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Static and dynamic contact angle measurements using a custom-made contact angle goniometer

Journal of Mechanical Science and Technology, 2023
Hanbyeol Pak, Jeong-Hyun Kim
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Comparison of the static and dynamic contact angle hysteresis at low velocities of the three-phase contact line

Colloids and Surfaces, 1991
The forced spreading and retraction of a drop with variable volume onto a poly(ethylene terephthalate) surface has been studied. Water and an aqueous glycerol solution were used as liquid phases. The critical static contact angles of advancement θAcr and retraction θRcr at which the contact line motion starts were determined and compared with the ...
Peter G. Petrov, Jordan G. Petrov
openaire   +1 more source

Generalized model for static contact angles and hysteresis on micro/nanostructured surfaces

Soft Matter
Compact general model predicts static contact angles and upper bounds on hysteresis for random or periodic surface topography by accounting for arbitrary local air entrapment and liquid infiltration in micro/nanofeatures near the contact line.
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Effects of static contact angles on inviscid gravity-capillary waves

Physics of Fluids, 2004
The effects of a static contact angle θ0 on the natural frequencies of inviscid gravity-capillary waves depend on the contact-line conditions. The cases of free-end and pinned-end edge conditions are analyzed in the limit of large Bond number B. The ratio (ω2−ω02)∕ω02 (where ω0 and ω are the natural frequencies without and with meniscus, respectively ...
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360� Evaluation of Projected Contact Angles of Static Droplets on Structured Surfaces

2019
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Foltyn, Patrick, Restle, Ferdinand, Weigand, Bernhard   +2 more
openaire   +1 more source