Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 9 of 9 for “"wetting transition"”.
-
Wetting transition and fluid trapping in a microfluidic fracture
… 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 …
-
Fluid-fluid displacement in porous-media microfluidics
… 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 and …
-
Interfacial properties of fluid phases in two dimensions and of three-component surfactant systems
… problem studied in this thesis concerns the wetting behavior of three-component surfactant systems. In a three-phase equilibrium system, the middle phase either wets or does not wet the interface between the upper and lower phases. In this work, we perform a systematic experimental search for …
-
Tailoring hydrodynamics of non-wetting droplets with nano-engineered surfaces
… to achieve better efficiency. Firstly, the wetting transition on textured super-hydrophobic surfaces is explored. The careful investigation of Cassie-Baxter to Wenzel transition of a pendant drop during the deposition explains that the rapid deceleration-induced water hammer pressure causes …
-
Surface Freezing in Surfactant/Alkane/Water Systems
Surface freezing transitions in mixed monolayers of a homologous series of cationic surfactants, the alkyltrimethyl ammonium bromides (CnTAB where n = 12, 14, 16, 18), as well as a range of non-ionic, zwitterionic and biological surfactants, have been investigated ellipsometrically with a range of …
-
Condensation heat transfer on nanoengineered surfaces
… determine the precise conditions leading to the transition between wetting and non-wetting states. By depositing pendant drops of various sizes on a superhydrophobic surface and observing their wetting behavior, a hitherto unknown mechanism for wetting transition is reported. A new phase diagram …
-
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 …
-
Moving contact lines, wetting transitions and interfacial instabilities in confined environments
… 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 contact …
-
Droplet levitation and underwater plastron restoration using aerophilic surface textures
… in liquids and responsive surfaces to resist the wetting of water on solid surface textures. When a superhydrophobic surface comes into contact with water, it traps a thin layer of air (plastron) within its surface texture. This entrapped air is advantageous for reducing the contact line pinning …