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 12 of 12 for “"surface renewal"”.
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Micrometeorological approaches to measure and model surface energy fluxes of irrigated citrus orchards in a semi-arid environment
… micrometeorological methods, mainly based on Surface Renewal theory, were studied and tested, in order to provide reliable and low cost estimates of sensible heat fluxes within the plant-atmosphere system. Micrometeorological techniques were integrated with in situ measurements of …
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Bubble Induced Heat Transfer in Two-Phase Systems
… has been extended to cover heat transfer at surfaces by introducing the concept of a property boundary layer in the vicinity of the surface. The property boundary layer is a consequence of changed voidage and hence of changed thermophysical properties of the emulsion phase at the surface. A …
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BTX extraction by sulfolane in a mixer-settler cascade
… greater, by a factor of 1.5 to 3, due to the surface renewal associated with drop break-up and coalescence promoted by agitation. A similar investigation was performed using real reformate from the Kuwait Oil Company. The phase ratios were in the range 0.5 to 1 to 3.25 to 1, the agitator speed …
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In-line measurement of solibility of physical blowing agents in thermoplastic melts as related to extrusion foaming
… obtained from the in-line method. A simple surface renewal model is used to study the gas dissolution behavior over the gas injection section during the foaming process. The model was found insufficient to explain the very complex phenomena occurring inside the extruder, suggesting the …
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Free-surface turbulence and air-water gas exchange
… technique is developed in order to quantify free-surface flows. Two aspects of this work are innovative. First, the use of a three-dimensional laser light cone and optical filtering of the camera allow for the motion of fluorescent flow tracers at the water surface to be isolated and measured. …
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Mass transfer to reacting laminar films
… the film theory and also the more sophisticated "Surface Renewal Theory". However, these theories are essentially concerned with transfer to stagnant pools or to deep films in plug flow. They have no<br/>terms which represent the effect of variable sub-surface velocity perpendicular to the …
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From substrate to surface: An integrated study on the Interfacial transfer and sediment suspension based on a turbulence perspective in vegetated flows
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-05-01
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Characterization and modification of carbon composite electrodes towards more affordable biosensing applications and integration into fluidic devices
… be molded into intricate shapes and sanded for surface renewal (without requiring additional steps to maintain the modification), allowing the sensors to be continuously reused even if damaged or fouled. Chapter 4 investigates the properties of TPEs using two different binders – polycaprolactone …
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Enhancing CO2 mass transfer in large scale algal raceway ponds through wave generation
… within the liquid medium, allowing the surface renewal of liquid with low CO2 concentrations to interact with the gas/liquid interface. The slopes were designed based on weirs, which create an impediment to flow, resulting in increased turbulence downstream of the slope. A number of …
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Turbulent Exchange of Ozone and Nitrogen Oxides between an Amazonian Rain Forest and the Atmosphere
… effect of deforestation on the regional ozone surface sink. Based on land cover information provided by LANDSAT images, the current regional ozone deposition average for central Rondonia was estimated to be ~85% of the original sink provided by the native rain forest cover. nitrogen monoxide …