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Drop Impact on Soft Surfaces: Beyond the Static Contact Angles
Langmuir, 2009The wettability of cross-linked poly(dimethylsiloxane) elastomer films and of octadecyltrichlorosilane self-assembled monolayers with water has been measured and compared using various methods. Contact angle hysteresis values were compared with values reported in the literature.
Romain, Rioboo +6 more
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Static contact angle in lattice Boltzmann models of immiscible fluids
Physical Review E, 2005We study numerically the capillary rise between two horizontal plates and in a rectangular tube, using a lattice Boltzmann (LB) method. We derive an equation for the static fluid-solid contact angle as a function of the wetting tendency of the walls and test its validity.
M, Latva-Kokko, Daniel H, Rothman
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The effects of static contact angles on standing waves
Physics of Fluids A: Fluid Dynamics, 1992Damping rates and natural frequencies of the fundamental axisymmetric mode in circular cylinders were measured when the contact angle between the water and the side walls was acute, obtuse, and about π/2. Damping rates decreased with increasing contact angle; natural frequencies increased with increasing contact angle.
D. Henderson +3 more
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Static and dynamic contact angles of water on photoresist
Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena, 2005Fluid management issues in an immersion lithography system include the retention of the liquid (i.e., prevention of residual liquid on the wafer) and the possible entrainment of gas bubbles within the immersion fluid. Three key parameters strongly influence the control of fluid within the lens gap: the static liquid/resist contact angle, the contact ...
H. Burnett +3 more
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Static and dynamic contact angles – A phase field modelling
The European Physical Journal Special Topics, 2009We propose a scheme for studying static and dynamic contact angles using a phase field model. The theoretical description is based on the Navier-Stokes equation with extra phase field terms and the continuity equation. In this model free of interface conditions, the contact angle can be controlled through the boundary conditions for the density field ...
R. Borcia, I. D. Borcia, M. Bestehorn
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Static and dynamic contact angles of evaporating liquids on heated surfaces
Journal of Colloid and Interface Science, 2010We studied both static and dynamic values of the apparent contact angle for gravity-driven flow of a volatile liquid down a heated inclined plane. The apparent contact line is modeled as the transition region between the macroscopic film and ultra-thin adsorbed film dominated by disjoining pressure effects. Four commonly used disjoining pressure models
Vladimir S, Ajaev +2 more
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Static and Dynamic Contact Angles of Water on Polymeric Surfaces
Langmuir, 1997Static contact angle and dynamic (advancing and receding) contact angles of water on polymeric surfaces were investigated using microscope cover glasses coated with various plasma polymers of trimethylsilane and oxygen. By variation of the mole fraction of the TMS/oxygen mixture, glass surfaces having varying degrees of wettability were prepared.
Masayo Miyama +4 more
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How pinning and contact angle hysteresis govern quasi-static liquid drop transfer
Soft Matter, 2016This paper presents both experimental and numerical simulations of liquid transfer between two solid surfaces with contact angle hysteresis (CAH). Systematic studies on the role of the advancing contact angle (θa), receding contact angle (θr) and CAH in determining the transfer ratio (volume of the liquid transferred onto the acceptor surface over the ...
H, Chen +4 more
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Effect of Camera Parallax Angle on the Accuracy of Static Contact Angle Measurements
LangmuirMeasuring 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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Fuzzy based models for estimating static contact angle and sliding angle of liquid drops
Progress in Organic Coatings, 2018Abstract 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 +1 more
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