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 130 for “"Low Viscosity"”.
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High Birefringence And Low Viscosity Liquid Crystals
… increase the birefringence and reduce the viscosity of the host LCs which leads to a faster response time. Dual-frequency liquid crystal exhibits a unique feature that its dielectric anisotropy changes from positive to negative when we increase the operating frequency. Submillisecond …
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Proppant placement in low-viscosity slickwater type fracturing fluids
Includes bibliographical references (pages 178-182).
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Low viscosity channels and the stability of long wavelength convection
Mantle convection simulations with a low viscosity channel, akin to the Earth's asthenosphere, are characterized by long wavelength flow structure. Boundary layer theory predicts that as the viscosity of the channel decreases, the wavelength that maximizes heat transfer increases. As a pattern …
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Three-Dimensional Direct Ink Writing of Low Viscosity Inks in a Polyvinyl Alcohol Suspension
… developing an additive manufacturing method for low-viscosity nanomaterial inks composed of polyvinyl alcohol (PVA) as matrix and various nanomaterial fillers in forming 3D gel structures. This methodology can be extrapolated to other material systems without the requirement of supporting …
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Experimental investigation of proppant transport and behavior in horizontal wellbores using low viscosity fluids
… a widely applied technology for stimulating low permeability reservoirs. The reason for stimulating tight formations is to increase recoverable reserves and to accelerate production. This can be accomplished by placing hydraulic fractures in the targeted formations to allow the flow of oil …
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An Evaluation Of UHPLC-MS Technology Encompassing Elevated Temperatures, Low Viscosity Operation and Recently Developed Stationary Phase Materials
… are several approaches to reducing mobile phase viscosity in order to overcome high pressures related to stationary phase permeability. This can be achieved either by elevating column temperature and or by employing organic rich eluents. To begin with, a standard application of UHPLC-MS was …
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The effect of a shallow low viscosity zone on mantle convection and its expression at the surface of the earth
… convective thermal sources at depths below the plate: mid-plate swells, the evolution of fracture zones, the mean depth and heat flow relationships with age and the observation of small scale (150-250 km) geoid and topography anomalies in the Central Pacific and Indian oceans. Convective …
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The effect of a shallow low viscosity zone on mantle convection and its expression at the surface of the earth
… convective thermal sources at depths below the plate: mid-plate swells, the evolution of fracture zones, the mean depth and heat flow relationships with age and the observation of small scale (150-250 km) geoid and topography anomalies in the Central Pacific and Indian oceans. Convective …
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Handling Characteristics and Colloidal Stability of an Orthodontic Sealant Containing Microcapsules
… fumed silica loading to show their effect on flow and stability. Low stress monomers and a low viscosity monomer was utilized in the formulations. Results demonstrated that glass loading had an effect on flow and the low viscosity monomer had an effect on both flow and stability. The increase …
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Investigation of aqueous kaolin suspensions : a rheological and sedimentation volume study
… a high solid content are required which show low viscosity, significant elasticity, and thixotropy as well. The aim of this investigation is to find such a composition of above components which show the above mentioned theological properties. The colloid interactions were studied by the …
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The effect of a low density residuum on geoid anomalies and topography
… pulls the surface downward. Thus, topographic lows are expected to correlate with seismic wave speed highs, contrary to the new seismic measurements. We propose models which include two segregated materials, representing the fertile upper mantle and the residue from crustal melting, in order to …
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Filter Based Stabilization Methods for Reduced Order Models of Convection-Dominated Systems
… dimension. Regularization is considered for the low viscosity, convection dominated setting.
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High Pressure Nuclear Magnetic Resonance Studies of Viscous Fluids
… of the common hydrodynamic relationships at high viscosity. The overall objective of this work, then, is to provide a foundation for the systematic investigation of high viscosity fluid dynamics, as has been carried out for low viscosity liquids in this laboratory.
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Exploration of large scale manufacturing of polydimethylsiloxane (PDMS) microfluidic devices
… with the recommendation being made for using low viscosity pre-cured PDMS, high temperature curing and high vacuum degassing techniques to produce high quality parts at high production rates. The further development of producing two-sided PDMS parts is recommended by investigating the usage of …
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A Study on Vibration-induced Particle Motion under Microgravity
… platforms, however, g-jitter induced convective flow may have resulted in certain effects that reduced the quality of the produced crystals. To investigate the effects of g-jitter on the motion of small particles, experiments were conducted under normal gravity by suspending spherical stainless …
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Mechanisms of Interaction Between Hydraulic and Natural Fractures in Shale Rocks
… cohesionless, “open” natural fractures, with a low viscosity injection fluid, in a toughness-dominated regime. In dried specimens, high flaw pressurization rates were necessary to overcome matrix fluid loss and achieve crossing. To complement and interpret the experimental results, existing …
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Mobility control of chemical EOR fluids using foam in highly fractured reservoirs
… (EOR) methods. The fractured networks provide flow paths several orders of magnitude greater than the rock matrix. Common enhanced oil recovery methods, including gases or low viscosity liquids, are used to channel through the high permeability fracture networks causing poor sweep efficiency and …
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Development Of Ionic Liquid Swelled Poly-Electrolyte Membranes For Use In Dye-Sensitized Solar Cells
… would combine the excellent performance of low viscosity electrolyte solvents with the high stability of low vapor pressure solid-state electrolytes, leading to a high performance and an improved longevity in DSSC electrolytes. A factorial design was implemented to determine the effects of …
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The Varied Thermal Response of Magnetic Iron-Oxide Nanoparticles During Induction Heating in Liquid and Solid-Liquid Phase Change Mediums
… Carrier fluids were characterized through viscosity, heat capacity, and density measurements which were used in the calorimetric calculation of the specific absorption rate (SAR) of the samples which is based on the nanoparticle concentration, carrier medium heat capacity, and the …
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