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Full-Text Articles in Engineering
Phonon Transport Analysis Of Semiconductor Nanocomposites Using Monte Carlo Simulations, Mayank Malladi
Phonon Transport Analysis Of Semiconductor Nanocomposites Using Monte Carlo Simulations, Mayank Malladi
All Theses
Nanocomposites are composite materials which incorporate nanosized particles, platelets or fibers. The addition of nanosized phases into the bulk matrix can lead to significantly different material properties compared to their macrocomposite counterparts. For nanocomposites, thermal conductivity is one of the most important physical properties. Manipulation and control of thermal conductivity in nanocomposites have impacted a variety of applications. In particular, it has been shown that the phonon thermal conductivity can be reduced significantly in nanocomposites due to the increase in phonon interface scattering while the electrical conductivity can be maintained. This extraordinary property of nanocomposites has been used to enhance …
Thermally Insulating Coating For Steel Drill Pipe, Matthew Mccaffrey
Thermally Insulating Coating For Steel Drill Pipe, Matthew Mccaffrey
Materials Engineering
A 5/16 in thick, 6 in x 6 in steel plate was used as a simple analog to 4 inch grade “S” steel drill pipe. Ethylene tetraflouroethylene (ETFE) applied as a powder coating was selected as the desired thermally insulating coating because of its excellent chemical resistance, maximum service temperature of 300°C, its thermal conductivity of 0.238 W/m-K, and for its ability to be applied in thicknesses of up to 80 mils. A powder primer coat of approximately 2 mils was applied using a conventional corona electrostatic powder sprayer, and then the high build topcoat was applied directly over the …
Improving R-Value In Brick Systems Using Various Pore-Forming Agents, Graham Shepherd
Improving R-Value In Brick Systems Using Various Pore-Forming Agents, Graham Shepherd
All Theses
Energy efficiency and energy savings are two topics that have continued to gain momentum over the last decade. This topic is extremely important when it comes to the construction of buildings and homes. Efforts have been ongoing to increase the insulation value of brick systems to hinder the conductive heat transfer through the material. The use of pore-forming agents (PFA’s) have been studied to increase the porosity within a ceramic system, through sacrificial burnout or place–holder method, which leave a residual, defined pore size distribution. This increase in porosity leads to better insulating capabilities and inherently lower conductivity values. In …
Hybrid Photothermal Technique For Microscale Thermal Conductivity Measurement, Zilong Hua
Hybrid Photothermal Technique For Microscale Thermal Conductivity Measurement, Zilong Hua
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
In nuclear reactors, the thermal energy generated from the nuclear reactions needs to be transferred all the way through the core of the fuels to the surrounding steam to be utilized. Therefore, thermal conductivity is considered an important thermophysical property of the fuel which needs to be measured. The nuclear fuel microstructure is known to be damaged by neutronirradiation, which can result in sharp, local changes of thermal conductivity. However, most existing thermal conductivity measurement techniques of nuclear fuel are not able to make high spatial-resolution measurements. The objective of this study was to develop a non-contact thermal conductivity measurement …