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 110 for “"temperature distributions"”.
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Velocity and temperature distributions for mercury in turbulent flow
Velocity and temperature profiles in mercury are reported for vertical flow in a pipe at Reynolds numbers of approximately 3.3 x 10⁴ and 5.4 x 10⁴ with variation in heat flux. At a Reynolds number ≈ 3.3 x 10⁴ profiles are reported for thermal calming lengths of approximately 17, 36, 61 and 84. The …
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Thermal deformations of plates produced by temperature distributions satisfying poisson's equation
… terms of the midplane plate deformations and the temperature distribution within the plate, which is assumed independent of the plate deformation. The plate boundary conditions are presented in a general form and are suitable for solutions involving either fixed, free, or hinged edge conditions. …
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Algorithms for Tomographic Reconstruction of Rectangular Temperature Distributions using Orthogonal Acoustic Rays
… with tomographic techniques to reconstruct temperature contours. A low velocity plume at around 450 °F exiting through a rectangular duct (3.25 by 10 inches) was used for validation and reconstruction. 0.3 % static temperature relative error compared with thermocouple-measured data was …
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3-D temperature distributions in spot heating of a ceramic by a focused microwave source
… required electric field strengths to raise the temperature of a localized spot in a rectangular block to 1500K are presented. With the block moving on an insulating support, the results also show that uniform temperature profiles through the depth of the alumina can be achieved, and thermal …
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Infrared measurements of steady-state temperatures and average surface temperature distributions for silver sliding on sapphire
Surface temperatures generated by dry sliding friction were measured with the use of an infrared radiometric microscope system developed at Virginia Polytechnic Institute and State University. Silver was used as the test material because of its resistance to oxide formation. The effects of load, …
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Investigating temperature distributions and thermal conduction effects in laser-heated plasmas relevant to Magnetized Liner Inertial Fusion
… of the spatially resolved spectra recovered temperature distributions Te(z) that are resolved along the direction of laser propagation but spatially integrated along the instrument's line-of-sight [1]. These temperature profiles can be used to assess how different experimental parameters such …
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Temperature effects on reinforced concrete building structures in Saudi Arabia
The effects of temperature distributions resulting from ambient conditions on reinforced concrete roofs in Saudi Arabia are investigated. A finite element program (ABAQUS) was used to determine the temperature distributions under different weather conditions. The model was verified by means of …
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Analysis of Power Deposition Patterns and Ultrasonic Phased Arrays for Localized Hyperthermia
… by square ultrasonic sources are presented. Temperature distributions are calculated from power deposition patterns by using a finite difference solution to the bioheat transfer equation. The combination of these two methods allows calculation of temperature distributions produced by a given …
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Theoretical and Computational Generalizations on Hyperthermia using Magnetic Nanoparticles including Optimization, Control, and Aggregation
… IONP heat dissipation allows for control of temperature distributions inside the body. Third, the FE model is used to solve the temperature distributions resulting from capillary diffusion of IONPs. This study shows that capillary diffusion combined with direct injection results in improved …
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Analytical and Numerical Modelling of Thermal Conductive Heating in Fractured Rock
… equation was developed and used to study temperature distributions between two thermal wells. A sensitivity analysis was conducted to assess the relative importance of hydrogeological parameters (hydraulic gradient, fracture aperture, fracture spacing) and rock material properties …
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Thermal Fe Analysis of Powder Bed Fusion Process: Power Input Evaluation and Parameter Sensitivity
… selected parameters of the PBF process affect temperature distributions, since a high temperature gradient and cooling rate are associated with residual stress and deformation in the built part. Since it was difficult to devise an analytical solution for this transient thermal problem, …
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Novel applications of pulse pre-pump Brillouin Optical Time Domain Analysis for behavior evaluation of structures under thermal and mechanical loading
… overlays; (3) characterize the strain and temperature sensitivities of distributed fiber optic sensors at elevated temperatures; (4) develop a thermal annealing approach to enhance the thermal stability and temperature sensitivity of the distributed sensors; and (5) apply the distributed …
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Numerical Models for Compression Mold Filling
… compression molding. The effects of charge size, temperature-dependent viscosity, mold temperature, and mold closing speed on the velocity and temperature distributions and flow front advancement are investigated.
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Nanocalorimetry of Bismuth Nanoparticles
… of bismuth films on various kinds of sensors. Temperature distributions are found to be nonuniform for calorimetric sensors with Al metallizations, but much more uniform for Pt metallized sensors. The consequences of this nonuniformity on caloric data are discussed.
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A zonal model for radiation heat transfer in coal-fired boiler furnaces
… coal-fired power plants. The boiler furnace exit temperature is a key indicator of the combustion and heat transfer processes taking place and has a profound impact on the operation of the heat exchangers downstream of the furnace. Having a model that can predict the furnace exit temperature and …
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Degradation study of AIGaN/GaN HEMT through electro-thermo-mechanical calculations and thermo-reflectance measurements
… of the gate current degradation and the lattice temperature distributions of these devices under the reverse-gate-bias reliability testing. In addition, we have compared the numerical results of our simulations with DC measurements and high resolution thermo-reflectance images, obtaining …
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A Study of Radiofrequency Cardiac Ablation Using Analytical and Numerical Techniques
… are often aimed at accurately predicting tissue temperature distributions by numerical solution of the bioheat equation. This thesis describes the development of an analytical solution to serve as a benchmark for subsequent numerical solutions. The solution, which was obtained using integral …
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A model of the winding and curing processes for filament wound composites
… part is the cure model which relates the cure temperature, applied at the boundaries of the composite, to the thermal, chemical, and physical processes occurring in the case during cure. For a specified cure cycle, the cure model can be used to calculate the temperature distribution, the degree …
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