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.
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Showing 1 to 20 of 60 for “"capillarity"”.
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Leveraging Capillarity
Surface tension is an essential force for the functioning of the world and life. Centuries of study, and still, new applications and limits of surface tension are being explored. Water has always drawn attention for its high surface tension value, 72mN/m compared to ethanol's 20mN/m. The high …
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Capillarity in lithographically patterned micro channels
The spontaneous capillary-driven filling of micro channels is important for a wide range of applications. Reporting for the first time for vertically mounted open top channels, in this work the theory for capillary rise in channels of rectangular cross-section has been tested and verified, taking …
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Fluidic Assisted Fabrication of Elastomer Optical Lenses Using Capillarity
… and plano-convex polymeric lenses utilizing the capillarity effect at liquid-liquid interface. It was demonstrated that, by controlling the material properties, such as density, viscosity and interfacial tension, polymeric lenses with the desired magnifying power can be fabricated over a large …
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The effects of capillarity on photonic crystal selective emitters
… to be beneficial in inhibiting degradation by capillarity, and an optimized structure that displays both higher efficiency and greater stability over time was ultimately theorized.
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Capillarity effects in the gas tungsten arc weldability of 21-6-9 stainless steel
Includes bibliographical references.
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Multiphase flow in porous media: the impact of capillarity and wettability from field-scale to pore-scale
Multiphase flow in the context of this Thesis refers to the simultaneous flow of immiscible fluids. It differs significantly from single-phase flow due to the existence of fluid-fluid interfaces, which are subject to capillary forces. Multiphase flow in porous media is important in many natural and …
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Interface pinning of CO₂ gravity currents
… projects. Here, we study the impact of capillarity on the migration of CO₂ plume through exchange flow experiments of immiscible fluids. We show that capillarity leads to the development of striking features not present in miscible exchange flows, including a vertical pinned interface …
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The linking of angiogenesis to contractile performance and substrate metabolism in the hypertrophied and failing heart
… to investigate how alterations in ventricular capillarity affect contractile performance and substrate metabolism in the isolated rat heart. It was hypothesised that, if cardiac contractile performance and substrate utilisation are directly related to ventricular capillarity then methods to …
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Macro- and micro-structural features direct bone regeneration in patterned biphasic calcium phosphate scaffolds
… implanted in pig mandibles. We evaluate capillarity induced by micropores as a mechanism that affects bone growth in vivo. We also assess the influence on bone volume, bone distribution and trabecular thickness of scaffold macro- and microporosity, as well as the ability of scaffold …
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Modelling Precipitation of Carbides in Martensitic Steels
… growth concepts and takes into account the capillarity effect. In the present work, a modified model has been developed for the precipitation of needle-shaped carbides, and a new model for plate-shaped carbides. The models are then verified experimentally, using five steels designed …
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Modeling fluid imbibition for hydraulic fracturing and its implications on unconventional hydrocarbon recovery
… studied, but the focuses were mostly given to capillarity. However, in this dissertation, several contributing fluid flow mechanisms have been identified based on the unique rock characteristics and subsurface conditions of unconventional formations, including capillarity, diffusion, osmosis, …
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Quantitative analysis of anisotropic edge retraction during solid-state dewetting of thin single crystal films
… boundaries. These film edges retract via capillarity-driven mass transport. In the absence of film or substrate patterning, the dewetting morphology of polycrystalline films is not well ordered. However, dewetting in single crystal films leads to a much more regular morphology, due to …
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Rheology and Processing of Animal and Plant-Based Dense Emulsions
… fluid properties, finite drop size, and capillarity
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Capillary-driven shape evolution in solid-state micro- and nano-scale systems
… them unstable due to excess surface free energy. Capillarity drives a process known as dewetting, during which holes form, the film edges retract, and a thickened rim of material accumulates at the edges. Various shape instabilities can occur on the film edge, resulting in complicated morphologies …
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Low-cost selective deposition of wax onto textured solar cells
… liquid wax to the extents of the regions through capillarity. Using this self-aligning feature of the cell texture, a low-cost delivery device was designed to bring liquid wax beads to within close proximities of the surface, without requiring high-precision equipment. The prototype uses an array …
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Fabrication of a nanoporous membrane device for high heat flux evaporative cooling
… mechanically-supported, high capillarity membranes that maximize thin film evaporation and high permeability liquid supply channels that allow for lower viscous pressure losses. The 600 nm thick membrane was fabricated on a silicon on insulator (SOI) wafer, fusion-bonded to a …
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Colloid phenomena in surface-modified polymer systems.
… proposed. The present prospective work on nano-capillarity is aimed at triggering attention to the method for the submicron characterisation of the surface wettability, adsorption and hydrophobicity.
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Jamming transition and emergence of fracturing in wet granular media
… of granular media, and the fundamental role of capillarity and wettability on the emergence of fracture patterns. We develop a hydromechanical computational model, coupling a "moving capacitor" dynamic network model of two-phase flow at the pore scale with a discrete element model of grain …
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Study of phenomenologies during templated solid-state dewetting of thin single crystal films
… boundaries, or film edges, then retract via capillarity-driven mass transport. As the edges retract, many phenomena occur, making the dewetting morphology complex. Dewetting of thin films has traditionally been considered undesirable in the microelectronics industry, but more recent studies …
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