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 83 for “"transient thermal"”.
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New components for dynamic modeling of transient thermal systems
… as well as discussion of the benefits of transient analysis versus static analysis.
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Transient thermal phenomena in phase change material integrated electronics cooling
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-12-01
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Transient thermal recovery of a pulsed BSCCO-2223 superconducting magnet
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2000.
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A multi-scale generalized finite element method for sharp, transient thermal gradients
… heat transfer problems exhibiting sharp thermal gradients are analyzed using the generalized finite element method. Convergence studies show that low order (linear and quadratic) elements require strongly refined meshes for acceptable accuracy. The high mesh density leads to small …
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Development of advanced modal methods for calculating transient thermal and structural response
… higher-order modal methods for predicting thermal and structural response. More accurate methods or ones which can significantly reduce the size of complex, transient thermal and structural problems are desirable for analysis and are required for synthesis of real structures subjected to …
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Two-dimensional Mapping of Interface Thermal Resistance by Transient Thermal Impedance Measurement
Interconnects in power module result in thermal interfaces. The thermal interfaces degrade under thermal cycling, or chemical loading. Moreover, the reliability of thermal interfaces can be especially problematic when the interconnecting area is large, which increases its predisposition to generate …
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Inverse and transient thermal analysis for rapid hyperthermia therapy planning, delivery and evaluation
… of hyperthermia therapy can be enhanced if a thermal management system is available for therapy planning, delivery and evaluation. The integrated thermal management system is not yet available, though some components of the system have been developed. For example, MIT Hyperthermia Program has …
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Experimental and Analytical Investigation of the Transient Thermal Response of Air Cooled Data Centers
<p>This work investigates the transient response of the thermal environment in air cooled data centers through experiments, analytical and computational tools. The key thermal characteristics of the various data center components were extracted from a set of experiments. This includes the …
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Process modeling for solidification microstructure and transient thermal stresses in laser aided DMD process
… kinetics, solidification parameters, thermal stresses and microstructure is highly desirable. This research deals with four key aspects of laser aided DMD. First, effect of solid state phase transformation on thermal stresses. Second, influence of high cooling rates on solidification …
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Nonlinear finite element analysis of a laminated composite plate with nonuniform transient thermal loading
… in laminated composite plates due to nonuniform transient heat fluxes and transverse mechanical loads.
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Prediction and mitigation strategies for the transient thermal performance of low thermal resistance microchannel evaporators
… flow boiling heat transfer offers an effective thermal management solution for high heat flux microelectronic devices such as laser diodes. The high heat transfer rates, nearly isothermal flow conditions, high surface area-to-volume ratios, and lower required pumping powers facilitate smaller …
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Expanding the Palette: Synthesizing Microencapsulated Organic Phase Change Materials in Metallic Matrices for Transient Thermal Applications
… device performance in applications whose thermal profiles are dominated by pulsed thermal loads. Heat propagation in a system can be characterized by steady or transient state heat transfer. In steady state, the temperature at any particular point remains constant after thermal equilibrium …
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Steady-State and Transient Thermal Modeling of Solid Electrolysis (SOXE) within the Mars Oxygen In-Situ Resource Utilization Experiment
… been created utilizing COMSOL to understand the thermal impact of ambient conditions and empirical data on any given location of the SOXE stack, both internal to the flow path and external. This transient model was validated against data from JPL’s MOXIE testbed laboratory and continued model …
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Improved multidimensional numerical methods for the steady state and transient thermal-hydraulic analysis of fuel pin bundles and nuclear reactor cores.
Thesis: Sc. D., Massachusetts Institute of Technology, Department of Nuclear Engineering, 1977
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Rapid Transient Cooling Utilizing Flash Boiling and Desorption on Graphitic Foams
Transient thermal systems present significant challenges. Neglecting the time constants
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FINITE ELEMENT AND IMAGING APPROACHES TO ANALYZE MULTISCALE ELECTROTHERMAL PHENOMENA
Electrothermal effects are crucial in the design and optimization of electronic devices. Thermoreflectance (TR) imaging enables transient thermal characterization at submicron to centimeter scales. Typically, finite element methods (FEM) are used to calculate the temperature profile in devices and …
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Design and analysis of a battery for a formula electric car
… major pack components is discussed. Finally, a transient thermal model of the pack is established to guide design choices about cooling.
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Wire wrapped fuel pin hexagonal arrays for PWR service
… over a range of geometries via steady-state and transient thermal hydraulic analyses, which yield the maximum power, and fuel performance and neutronics studies, which provide the achievable discharge burnup. The final optimization integrates the outputs from these separate studies into an …
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System Level Modeling of Thermal Transients in PEMFC Systems
… by over-sizing parasitic components. A transient fuel cell system level model is being developed that includes a simplified transient thermal and parasitics model. Model validation is achieved using a small 1.2 kW fuel cell system, due to its availability. While this is a relatively …
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