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The thermal conductivity of solid hydrogen.Bohn, R. G. January 1969 (has links)
No description available.
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Study of Optimum Process Conditions for Production of Thermally Conductive Polymer Compounds Using Boron NitrideBahl, Kushal 13 December 2010 (has links)
No description available.
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Kinetic model of heat conduction in molecular gasesHong, Daomin January 1997 (has links)
No description available.
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Helium Assisted Sand Casting of Aluminum AlloysSaleem, Muhammad Qaiser 28 April 2011 (has links)
Sand casting is the most widely used casting process for both ferrous and non-ferrous alloys; however, the process is marred by large grain size structures and long solidification times. The coarser microstructure has a negative effect on the mechanical properties of the cast components and the long processing time affects the overall productivity of the process. The research reported herein addresses these problems for aluminum sand castings by enhancing the rate of heat extraction from the casting by replacing air, which is typically present in the pores of the sand mold and has a relatively low thermal conductivity by helium which has a thermal conductivity that is at least five times that of air in the temperature range of interest. The effect of (1) the flow rate of helium, (2) the way in which it is introduced into the mold, and (3) the mold design on (a) the average grain size, (b) the secondary dendrite arm spacing, and (c) the room temperature tensile properties of castings is investigated and compared to their counterparts produced in a typical sand casting process. In addition, a cost analysis of the helium-assisted sand casting process is performed and an optimum set of parameters are identified. It is found that when the helium-assisted sand casting process is performed with close to the optimum parameters it produces castings that exhibit a 22 percent increase in ultimate tensile strength and a 34 percent increase in yield strength with no significant loss of ductility, no degradation in the quality of the as-cast surfaces, and no significant increase in the overall cost.
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Thermal and thermoelectric transport in organic and inorganic nanostructuresWeathers, Annie C. 05 November 2012 (has links)
Thermal transport in nanowires and nanotubes has attached much attention due to their use in various functional devices and their use as a model system for low dimensional transport phenomena. The precise control of the crystal structure, defects, characteristic size, and electronic properties of nanowires has allowed for fundamental studies of phonon and electron transport in a variety of nanoscale systems. The thermal conductivity in nanostructured materials can vary greatly compared to bulk values owing to classical and quantum size effects. In this work, two model systems for investigating fundamental phonon transport were investigated for potential use in thermoelectric and thermal management applications. The thermoelectric properties of twin defect indium arsenide nanowires and the thermal conductivity of polythiophene nanofibers with improved polymer chain crystallinity were measured with a microfabricated measurement device. The effects of twin planes on reducing the mean free path of phonons in indium arsenide and the effects of improved chain alignment in increasing the thermal conductivity in polymer fibers is discussed. / text
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A study of bond-length fluctuations in transition metal oxidesYan, Jiaqiang 28 August 2008 (has links)
Not available / text
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Thermal conductivity of metal oxide nanofluidsBeck, Michael Peter. January 2008 (has links)
Thesis (Ph.D)--Chemical Engineering, Georgia Institute of Technology, 2009. / Committee Chair: Teja, Amyn S.; Committee Member: Abdel-Khalik, Said I.; Committee Member: Meredith, Carson; Committee Member: Nair, Sankar; Committee Member: Skandan, Ganesh. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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A study of bond-length fluctuations in transition metal oxides /Yan, Jiaqiang, Goodenough, John B. January 2004 (has links) (PDF)
Thesis (Ph. D.)--University of Texas at Austin, 2004. / Supervisor: John B. Goodenough. Vita. Includes bibliographical references.
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Analise termica do combustivel de um reator de potenciaCASADEI, ALBERTO L. 09 October 2014 (has links)
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Modelo numerico de isolacao termica interna tipo fibras em dutos de gas quenteWELTER, ARMIN N.U. 09 October 2014 (has links)
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