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 20 for “"Thermal fields"”.
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Interplay of Electrical, Mechanical and Thermal Fields in III-N Nanostructures for LED Applications
… competing effects of various internal/built-in fields on the electronic structure and optical properties of III-N nanostructured (Quantum Dots and disk-in-a-wire) LEDs using a multiscale modeling approach. The objective is three-fold: (1) calculate the strain distribution, optical transition …
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O método quasi-finito e o método dos elementos finitos para campos térmicos
… be used to deal with transient and steady state thermal fields. The quasi-finite approach is also used with various aspects of the the strategy presented in detail. This method is applied to handle problems which cannot be treated easily with the finite element method. A comparative example of …
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Modeling, Optimization, and Control of Electromagnetic Oncological Hyperthermia
… for the prediction of electromagnetic and thermal fields inside of human tissue are presented and validated. Various schemes for optimizing the effectiveness of hyperthermia treatments that exploit these numerical models are then presented. Lastly, the use of noninvasive temperature …
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Flow and Thermal Field Measurements in a Combustor Simulator Relevant to a Gas Turbine Aero-Engine
… for higher power-to-weight ratios, increased thermal efficiencies, and reliability while maintaining affordability. In its continual quest, the industry must continually try to raise the turbine inlet temperature, which according to the well-known Brayton cycle is key to higher engine …
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Combined Modeling and Experimental Validation of Boiling Curve and Critical Heat Flux
… describes the stochastic nature of the flow and thermal variations, as well as the tightly coupled bubble motion in the flow and thermal fields. This suggests that to extend the modeling of subcooled nucleate boiling to predict critical heat flux, both probabilistic formulation and stochastic …
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Liquid crystal thermography and image processing in heat and fluid flow experiments
… to measure simultaneously both flow and thermal fields - this method may be described as particle image velocimetry and thermometry (PIVT). Some of the experimental results presented are applied to an important Industrial improvement in heat exchanger design and could result in …
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Design and Benchmarking of a Combustor Simulator Relevant to Gas Turbine Engines
… simulate the non-uniformities in the flow and thermal fields exiting real gas-turbine combustors. The design of the combustor simulator required analyses of the flow paths within a real combustor in a gas turbine engine. Modifications were made to an existing wind tunnel facility to allow for …
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Experimental investigation of overall effectiveness and coolant jet interactions on a fully cooled C3X turbine vane
… was experimentally measured using a thermally scaled, matched Biot number vane model featuring a realistic internal impingement scheme and had normalized surface temperatures that were representative of those found on engine components. A geometrically identical vane was also …
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A Bayesian Reappraisal of Australian Crustal Heat Flow and Temperature
Geothermal data offers a unique perspective from which to image the Earth. However, geothermal data is difficult to collect and this has necessitated a reliance on industrial data collection during the exploration for mineral and petroleum resources. Resulting data quality issues have limited …
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A Bayesian Reappraisal of Australian Crustal Heat Flow and Temperature
Geothermal data offers a unique perspective from which to image the Earth. However, geothermal data is difficult to collect and this has necessitated a reliance on industrial data collection during the exploration for mineral and petroleum resources. Resulting data quality issues have limited …
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A Multi-Resolution Direct Numerical Simulation of Turbulent Stratified Flows with High Prandtl Numbers
… computational resources required to resolve the thermal fields when 𝑃𝑟 > 1, a multi-resolution method is developed to resolve the temperature and momentum fields with different spatio-temporal resolutions. Stable thermal stratification affects turbulent flows in oceans, rivers, lakes, and the …
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Using control surfaces to evaluate weighting coefficients for fast thermo-fluid reduced-order-modelling strategies
… dissipating avionic cables and components, the thermal management of which is a primary concern for the reliable operation of aircraft systems. Therefore, there is a pressing need for fast thermo-fluid modelling capabilities, and moreover there is a desire to incorporate such practices early in …
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Enhancing the Sustainability of Aluminium Production and Products
… robust fits of the finite element model to the thermal fields and stress-strain responses in the experiments. However, when constitutive data generated by the PRO3™ through-process modelling platform is used, discrepancies arise in the predictions of stress-strain behaviour compared to …
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LEU+ Fuel Cycle Investigation of the BWRX-300 Design Using Neutronic and Two-Phase Thermal Hydraulic Analyses
… tools available to represent neutronic and thermal hydraulic conditions respectively. When performing coupled calculations between these two codes, large computational cost is seen, especially in neutronic burnup calculations in three dimensions. The main challenge when performing coupled …
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Microstructure property development in friction stir welds of aluminim based alloys
… transfer model was established to predict the thermal fields associated with FSW. This numerical model utilises the alternating direction implicit method to simulate the transient thermal cycle based on the process parameters, thermo-physical and thermo-mechanical properties of the material. …
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Syngas ash deposition for a three row film cooled leading edge turbine vane
… and hence are strongly affected by the flow and thermal fields generated by the coolant interaction with the main-stream. Because of this, the stagnation coolant jets are successful in pushing and/or cooling the particles away from the surface and minimizing deposition and erosion in the …
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Structure-thermal coupling in viscoelastic material in rubber bushing of vehicle system
… of rubber bushing are explored and their thermal fields are investigated. Due to the nonlinear force-deflection relationship of the viscoelastic material, finding satisfactory mechanical properties of rubber components still poses a great challenge. However, industry nowadays is in urgent …
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Scaling study of phase change memory using carbon nanotube electrodes
… in resistance in the presence of electric and thermal fields. Memory based on PCMs could be ten times denser and one hundred times more energy-efficient than present technologies, enabling instant turn-on computers and mobile devices (smart phones) that could last for weeks on a single battery …
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Development and Applications of a Flat Triangular Element for Thin Laminated Shells
… and shells and is extended for free vibration, thermal, and geometrically nonlinear analysis. The major drawback of the DKT plate bending element is that the transverse displacement is not explicitly defined within the interior of the element. Hence obtaining the consistent mass matrix or the …
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Dimensionally reduced modeling and gradient-based design of microchannel cooling networks
… of electromagnetic properties, self-healing and thermal management depending on the fluid circulated in the embedded microchannels. Recent breakthroughs in the vaporization of sacrificial component (VaSC) manufacturing technique have allowed for the creation of intricate microchannel networks and …