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 11 of 11 for “"temperature mixing"”.
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Rates and patterns of temperature mixing at a small stream confluence under variable incoming flow conditions
… converge and start to mix. The degree of mixing that occurs within a confluence influences ecological and water quality conditions locally as well as farther downstream. Nevertheless, variations in rates and patterns of mixing at confluences under different flow conditions are poorly …
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INVESTIGATION ON RHEOLOGY OF CEMENT PASTE AND CONCRETE AT HIGH TEMPERATURE
… chemical admixtures and subjected to high temperature and prolonged mixing time. The thesis also aimed at formulating recommendations for the effective use of chemical admixtures in high temperature environments. In order to achieve these objectives, the rheological properties of portland …
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INVESTIGATION ON RHEOLOGY OF CEMENT PASTE AND CONCRETE AT HIGH TEMPERATURE
… chemical admixtures and subjected to high temperature and prolonged mixing time. The thesis also aimed at formulating recommendations for the effective use of chemical admixtures in high temperature environments. In order to achieve these objectives, the rheological properties of portland …
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The removal of organic waste matter from secondary sewage effluents by chemical coagulation
… scale and were conducted under constant room temperature, mixing and stirring conditions. A standard laboratory technique was employed which approximately simulates the large scale operation. Removal was evaluated in terms of Chemical Oxygen Demand (COD) of the wastewater. It was found that, …
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Development and Calibration of Reaction Models for Multilayered Nanocomposites
… reactions, and cannot be used to quantify mixing rates at lower temperatures within reasonable accuracy [Fritz (2011)]. We thus develop a thermal model for a multilayer stack comprising a reactive Ni-Al bilayer (nanocalorimeter) and exploit temperature evolution measurements to calibrate …
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The Chemical and Mechanical Properties of Thiol Modified ABS
… to ABS in latex and during processing in a high temperature mixing operation through the thiol group by free radical addition to the double bond. The bound stabilisers produced in concentrated form (masterbatches) have been diluted to normal concentration (1%) with unstabilised ABS and their …
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3-D numerical simulation of reactive extrusion and its application to polymerization of ε-caprolactone in co-rotating twin-screw extruders
… extruders is reliable. Three indices, i.e. flux-mixing coefficient, temperature mixing coefficient, and conversion ratio mixing coefficient, are defined for the first time to evaluate the axial mixing during reactive extrusion. Moreover, transverse mixing is characterized with the ratio of …
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Amphiphilic Poly(2-isopropyl-2-oxazoline)-block-poly(lactide) Nanoparticles as Drug Delivery Vehicles
… formed stable nanoparticles in water at room temperature. On the contrary, stability of the nanoparticles was found to be poor in saline solutions at body temperature. Mixing PEG-b-PDLLA with PiPOx-b-PLA in a ratio of 20:80 w-% increased the stability of the nanoparticles in physiological …
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Effects of pumped storage project operations on the spawning success of centrarchid fishes in Leesville Lake, Virginia
… with daily flow reversals, and water level and temperature fluctuations in Leesville Lake. Water levels in Leesville fluctuate as much as 3.5 m (11 ft) per day and 4 m (13 ft) per week during spawning periods of centrarchid fishes. In addition, daily intrusions of subsurface water from Smith …
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Skin Friction Sensor Design Methodology and Validation for High-Speed, High-Enthalpy Flow Applications
… via a copper water channel to minimize the temperature gradient across the electronic systems. The design offers a unique immunity to many of the interfering influences found in complex, high-speed, high-enthalpy flows that would otherwise overshadow the desired wall shear measurement. The …
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Quantitative evaluation of low-temperature performance of sustainable asphalt mixtures and binders containing recycled asphalt shingles (RAS) and rejuvenators
… based technique for estimating the embrittlement temperature of RAS-modified mixtures and asphalt binders prepared in the laboratory. During AE testing, the AE activities of mixture or binder specimens were monitored during cooling from room temperature to -50°C to estimate the onset of thermal …