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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 22 for “"HEAT TRANSFER MODELS"”.
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A coupled electromagnetic and heat transfer finite-element model for simulating microwave processing of composite materials in a cylindrical resonant cavity
A coupled electromagnetic/heat transfer model capable of simulating microwave processing of composite materials in a cylindrical resonant cavity was developed. The two-dimensional model simulates processing of axisymmetric material loads in cylindrical resonant cavities operating in the TM₀₁₀ mode. …
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Thermal analysis of biochemical systems
… In a classic DSC experiment, a protein is heated from 20-80°C and the heat absorbed while the protein unfolds is measured. Many researchers prefer the use of a DSC instrument because of its label-free nature, meaning that no fluorescent or radio-labeled tag is necessary to perform the …
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Microwave heating of a coating on a temperature-sensitive substrate
Microwave heating has been considered for the heating of a coating in contact with a temperature-sensitive substrate. A methodology was developed to conduct a microwave heating feasibility study for a candidate system. The study consisted of dielectric property determination, development of heat …
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Development of a quasi-dimensional diesel engine simulation for energy and availability analysis
… multi-zone combustion model and a radiation heat transfer model are developed for the study of turbocharged diesel engine performance and energy and availability balance. The quasi-dimensional multi-zone combustion model is based on the air and fuel mixing process with a temperature and …
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Second-Surface Mirror Effects in Thin-Film Absorber Layers
… has been developing analytical and numerical heat transfer models for NASA's Langley Research Center for more than 25 years. Recent versions of these models are being used in the design of the next-generation thermal radiation detectors intended for Earth radiation budget campaigns. The …
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Analysis of flow and heat transfer inside different filter designs
… is to theoretically investigate internal flow, heat and mass transfer inside different filter designs. The efficiency of filtering methods used to reduce/remove particles deposited in a liquid varies greatly depending on the type of par- ticles, the quality of filter media and filter design. As …
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Thermal Modelling and Validation of Heat Profiles in an RF Plasma Micro-Thruster
… onto spacecraft such as volume constraints and heat dissipation limitations, a characterization of the heat generation and heat transfer properties of Pocket Rocket is necessary. Several heat-transfer models of Pocket Rocket were considered as a part of this analysis to determine viability and …
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Calculation of gas-wall heat transfer from pressure and volume data for spaces with inflow and outflow
Heat transfer in cylinder spaces is important to the performance of many reciprocating energy conversion machines, such as gas compressors and Stirling machines. Work over the past 10 years has shown that heat transfer driven by oscillating pressure differs from steady state heat transfer, in …
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The effects of orientation angle, subcooling, heat flux, mass flux, and pressure on bubble growth and detachment in subcooled flow boiling
The effects of orientation angle, subcooling, heat flux, mass flux, and pressure on bubble growth and detachment in subcooled flow boiling were studied using a high-speed video camera in conjunction with a two-phase flow loop that can accommodate a wide range of flow conditions. Specifically, …
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Time and probablity of failure of timber framed walls in fire
… of the research for this thesis was to develop models to predict the performance of fire resistant light-timber framed walls, in relation to requirements of new performance-based building fire regulations being introduced around the world. The performance bases that were adopted in the …
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Capillary Pumped Loop Performance Investigation through Flow Visualization
… two-phase thermal control devices which, like heat pipes, use surface tension forces to circulate a cooling fluid from an evaporator to a condenser. The pressure difference for fluid circulation is developed in the pores of a wick structure located in the evaporator. Unlike heat pipes, CPLs …
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Ultrasonic absorption in soft and hard fetal tissues
… effects could occur is the deposition of heat in the tissue as a result of the energy absorbed from the acoustic wave. Because the teratogenicity of hyperthermia has been well-established and concerns of more subtle effects of elevated fetal temperature exist, there is currently a …
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High force density linear permanent magnet motors : "electromagnetic muscle actuators"
… presents new, unified scaling and magnetic field models for its performance. This active material motor model predicts that motors composed of large numbers of very small, actively-cooled repeat units, similar to the architecture of biological muscles, can provide greatly enhanced force density …
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An improved finite-element model for simulating microwave processing of polymers and polymer-composites in a cylindrical resonant cavity
… was improved. The model consists of two submodels: the electromagnetic submodel and the heat transfer submodel. These two models are coupled together by the heat generation term arising due to the microwave energy. A single finiteelement program was written to implement the two submodels. …
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Multi-physics modeling of heat and particle transfer in porous media
… thermal dissipation considering the convection heat transfer in porous media and the filtration mechanisms of bentonite grout in porous media. In the first part, the study challenges traditional underground duct-bank design assumptions and introduces a novel approach to enhance heat dissipation …
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Development of MiST-IR : multi-spectral infrared thermography
… diagnostic technique for interrogating boiling heat transfer phenomena. The technique, called Multi-Spectral Infrared Thermography or MiST, builds on previous diagnostic techniques for measuring the 2-D wall temperature distribution or the 2-D phase distribution of the fluid above the surface. …
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Measurements of in-cylinder heat transfer with inflow-produced turbulence
Heat transfer in cylinder spaces is important to the performance of many reciprocating energy conversion machines, such as gas compressors and Stirling machines. Work over the past 10 years has shown that heat transfer driven by oscillating pressure differs from steady state heat transfer in …
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Dynamics of nanoparticle combustion
… was also measured using the shock tube to heat the particles to known temperatures. The burning time and peak particle temperature results suggested that heat transfer models currently used for burning nanoparticles may significantly overestimate heat losses during combustion. By applying …
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Automated Segmentation and Analysis of High-Speed Video Phase-Detection Data for Boiling Heat Transfer Characterization Using U-Net Convolutional Neural Networks and Uncertainty Quantification
Boiling heat transfer is a complex phenomenon used for cooling and heat management purposes in various industrial applications, such as nuclear reactors. Accurate characterization and understanding of boiling dynamics are essential for the design and optimization of heat transfer systems. …
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An integrated system of vapor-compression chiller and absorption heat pump: Experiment, modeling, and energy and economic evaluation
… energy, approximate 50% are used for building heating, cooling, and water heating. Improving the efficiencies of the devices for building heating and cooling has potentials to reducing the energy consumptions. This research aims to find one solution for building energy efficiency through …
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