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Showing 1 to 11 of 11 for “"Partial wetting"”.
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Experiments in fluid spreading in the partial wetting regime
… naturally ocurring phenomena. In the complete wetting case, a fluid will spread until it can cover the entire surface with a thin film of molecular thickness; the dynamics of these fluids are well understood. In the partial wetting case, the fluid first spreads and then stops, forming a puddle. …
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Wetting transition and fluid trapping in a microfluidic fracture
During immiscible fluid-fluid displacement in partial wetting regime, defending fluid is often trapped as a liquid film on solid surfaces through the mechanism of wetting transition. Here, we study the impact of roughness on wetting transition and fluid trapping in a microfluidic fracture. We …
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Moving contact lines, wetting transitions and interfacial instabilities in confined environments
… for thin-film flows on solid surfaces in the partial wetting regime and show that a self-consistent description of free energy of this system at equilibrium leads to a Cahn-Hilliard form with an effective height-dependent surface tension due to the interniolecular forces in the vicinity of the …
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Phase separation in giant vesicles
… under small tension perturbation. Furthermore, a wetting transition, which has been reported only in a few experimental systems, was discovered in this system. By increasing the polymer concentration, the PEG-rich phase changed from complete wetting to partial wetting of the membrane. If …
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Influence of Surface Wettability on Drop Dynamics and Condensation
… In practice, some form of intermediate or partial wetting is obtained with the liquid adopting a spherical cap shape. Two metrics are commonly employed to specify the surface wettability: rest or static contact angle (_) and contact angle hysteresis (__). Partially non-wettable surfaces are …
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Packed bed reactors at the pellet scale: magnetic resonance studies of hydrodynamics, mass transport and reaction
… catalyst. Inhomogeneous partial wetting of the catalyst, representative of that known to occur in commercial reactors, is found to cause substantial heterogeneity in chemical composition across a single catalyst pellet. Commonly used 1D reaction-diffusion models are …
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Melt growth of BSO (Bi₁₂SiO₂₀) : critical issues for growth in a micro-g environment
… according to the subject in each phase. (1) The wetting behavior between BSO and the confinement material, platinum, is critical in a Bridgman type of growth (Chap 3). The sessile drop method combined with a drop shape analysis was used to measure and compute the three-phase contact angles and …
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Fluid-fluid displacement in porous-media microfluidics
… two-phase flow with moving contact lines in the partial wetting regime. We construct a self-consistent formulation of fluid-solid surface energy which allows prescribing arbitrary static contact angles. We then propose a formulation to account for nonequilibrium conditions near the contact line …
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Multi-scale morphology development in solution coated conjugated polymers
… between pinning and depinning forces on a partial wetting substrate which underpins the film-to-stripe transition. To move a step further, we utilize meniscus guided solution coating to deposit conjugated polymers with various coating condition to study the meniscus instability driven …
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Solid-liquid interactions in microscale structures and devices
… of thin foils into 3D structures, and droplet wetting of hydrophobic micropatterned surfaces. The phenomenon of self-assembly of complex structures is common in biological systems. Examples include self-assembly of proteins into macromolecular structures and self-assembly of lipid bilayer …
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Steady flow and stability analysis of a thin film over variable topography
… non-Newtonian properties. Moreover, a fully wetting state cannot always be achieved. Recent studies indicate that the wetting state of the substrate depends both on its geometrical and liquid properties, while air inclusions can be formed during the coating process of these surfaces resulting …