Дисертації з теми "Windows – Thermal properties – Mathematical models"
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Kanuchok, Jonathan L. "The thermal effect and clocking in quantum-dot cellular automata." Virtual Press, 2004. http://liblink.bsu.edu/uhtbin/catkey/1286605.
Повний текст джерелаDepartment of Physics and Astronomy
Saad, Zoubeir. "Simulation of temperature history and estimation of thermal properties of food materials during freezing." Diss., This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-02132009-170810/.
Повний текст джерелаNapolitano, Ralph E. Jr. "Finite differenc-cellular automation modeling of the evolution of interface morphology during alloy solidification under geometrical constraint : application to metal matrix composite solidification." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/32810.
Повний текст джерелаBhatt, Hemanshu D. "Effect of interfacial thermal conductance and fiber orientation on the thermal diffusivity/conductivity of unidirectional fiber-reinforced ceramic matrix composites." Diss., This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-07282008-135034/.
Повний текст джерелаWilson, Scott E. "Investigation of Copper Foam Coldplates as a High Heat Flux Electronics Cooling Solution." Thesis, Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/6944.
Повний текст джерелаUchaipichat, Anuchit Civil & Environmental Engineering Faculty of Engineering UNSW. "Experimental investigation and constitutive modelling of thermo-hydro-mechanical coupling in unsaturated soils." Awarded by:University of New South Wales. School of Civil and Environmental Engineering, 2005. http://handle.unsw.edu.au/1959.4/22068.
Повний текст джерелаLiu, Xing Lu. "Some problems and analysis for thermal bending plates." Thesis, University of Macau, 2010. http://umaclib3.umac.mo/record=b2148242.
Повний текст джерелаBOARI, ZOROASTRO de M. "Modelo matematico da influencia da distribuicao de particulas de SiC nas tensoes termicas em compositos de matriz metalica." reponame:Repositório Institucional do IPEN, 2003. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11105.
Повний текст джерелаMade available in DSpace on 2014-10-09T13:57:35Z (GMT). No. of bitstreams: 1 09021.pdf: 10882829 bytes, checksum: e229b5d74e10881ea73228929632ad10 (MD5)
Tese (Doutoramento)
IPEN/T
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
Blivi, Adoté Sitou. "Effet de taille dans les polymères nano-renforcés : caractérisation multi-échelles et modélisation." Thesis, Compiègne, 2018. http://www.theses.fr/2018COMP2431/document.
Повний текст джерелаThe work presented in this paper aims to highlight and to understand the size effect of nano-reinforcements on nanocomposite properties With an experimental approach. Nanocomposites of PMMA and silica particles With different sizes (15nm, 25nm, 60nm, 150nm and 500nm) and volume fractions (20/0, 4 0/0 and 60/0) were manufactured. Multiscale analysis (MET and DRX-WAXS) have shown that the characteristic parameters of the microstructure of nanocomposites vary With the size of the nanoparticles. Indeed, the decrease in the size of nanoparticles at a given volume fraction implies a decrease of the intermolecular distance. This decrease has induced a densification of the matrix and a decrease of the matrix chain mobility. Mechanical tests (tensile, DMA) have shown that the young (E) and the conservation (E') moduli of the nanocomposites increase With the decrease in the size of the nanoparticles With a constant volume fraction. And the increase of E l is kept when temperature growing. An increase in glass transition (Tg) and degradation temperature (Td) was also observed With the DSC, DMA and ATG tests. Experimental elastic properties of the nanocomposites were used to assess the relevance of size effect micromechanical models, particularly the Hashin-Shtrikman bounds With interface effects proposed by Brisard. The modeling has shown that to reproduce the experimental elastic moduli of nanocomposites, the elastic coefficients of the interface must be dependents on particle sizes. And the state of dispersion of particles must be taken into account
Kulkarni, Milind S. "Modeling a heat regenerator-reactor with temperature dependent gas properties." Thesis, 1992. http://hdl.handle.net/1957/37124.
Повний текст джерелаGraduation date: 1993
Dawkrajai, Pinan. "Temperature prediction model for a producing horizontal well." Thesis, 2006. http://hdl.handle.net/2152/2710.
Повний текст джерелаBurns, Erick R. "Thermodynamics of non-dilute saline solutions in variably saturated porous media." Thesis, 2004. http://hdl.handle.net/1957/29363.
Повний текст джерелаGraduation date: 2005
"Predicting thermal performance of building design in Hong Kong: scale-model measurement and field study." 2004. http://library.cuhk.edu.hk/record=b5892127.
Повний текст джерелаThesis (M.Phil.)--Chinese University of Hong Kong, 2004.
Includes bibliographical references (leaves 150-153).
Abstracts in English and Chinese.
Chapter chapter 1 --- Introduction --- p.10
Chapter chapter 2 --- Background & Literature --- p.15
Chapter 2.1 --- Why Environmental Design? --- p.15
Comfort and Energy --- p.15
"Our Problems: Energy, Environment, and Health" --- p.19
Chapter 2.2 --- Knowledge in Environmental Design --- p.27
What is Environmental Design? --- p.27
Current knowledge in Environmental Design: Thermal Performance --- p.30
Thermal Studies in Hong Kong --- p.37
Chapter 2.3 --- Summary and Propositions --- p.42
Chapter chapter 3 --- Scale Model Study --- p.47
Chapter 3.1 --- Test Modules Application --- p.47
Chapter 3.2 --- Research Methodology & Experimental Setup --- p.54
Testing Facility in CUHK --- p.54
Solarimeter Substitute --- p.58
Chapter 3.3 --- Experimental Series --- p.61
Chapter 3.3.1 --- Envelope Colour --- p.61
Chapter 3.3.2 --- Windows --- p.73
Chapter 3.3.3 --- Shading --- p.75
Chapter 3.3.4 --- Thermal Mass --- p.80
Chapter 3.3.5 --- Orientations --- p.83
Chapter 3.3.6 --- "Combined Effects ofThermal Mass, Windows and Orientations" --- p.85
Chapter 3.3.7 --- "Combined Effects ofThermal Mass, Shading and Orientations" --- p.88
Chapter 3.4 --- Summary of Experiments --- p.90
Chapter 3.5 --- Predicting Indoor Air Temperature --- p.93
Chapter 3.5.1 --- Development of Predictive Formulas --- p.93
Chapter 3.5.2 --- Parametric Study of Envelope Colour --- p.97
Chapter 3.5.3 --- Parametric Study of Window Shading --- p.100
Chapter chapter 4 --- Field Study --- p.104
Chapter 4.1 --- Description of Housing Unit: Concord-I Block --- p.104
Chapter 4.2 --- Experimental Setup --- p.105
Chapter 4.3 --- Result of Field Measurement --- p.108
Chapter 4.3.1 --- Perform ance of top-most floor --- p.108
Chapter 4.3.2 --- Performance of Individual Rooms --- p.109
Chapter 4.3.3 --- Effect of Orientation --- p.110
Chapter 4.3.4 --- Indoor Thermal Comfort --- p.113
Chapter 4.4 --- Summary of Field Measurement --- p.116
Chapter chapter 5 --- Thermal Performance Prediction --- p.118
Chapter chapter 6 --- Conclusion --- p.126
Appendix 1 --- p.131
Appendix 2 --- p.133
Appendix 3 --- p.140
Qu, Yan. "Silicon wafer surface temperature measurement using light-pipe radiation thermometers in rapid thermal processing systems." Thesis, 2006. http://hdl.handle.net/2152/2794.
Повний текст джерелаLin, Angela A. "Two dimensional numerical simulation of a non-isothermal GaAs MESFET." Thesis, 1992. http://hdl.handle.net/1957/37014.
Повний текст джерелаGraduation date: 1992
Fitzpatrick, John Nathan. "Coupled thermal-fluid analysis with flowpath-cavity interaction in a gas turbine engine." Thesis, 2013. http://hdl.handle.net/1805/4441.
Повний текст джерелаThis study seeks to improve the understanding of inlet conditions of a large rotor-stator cavity in a turbofan engine, often referred to as the drive cone cavity (DCC). The inlet flow is better understood through a higher fidelity computational fluid dynamics (CFD) modeling of the inlet to the cavity, and a coupled finite element (FE) thermal to CFD fluid analysis of the cavity in order to accurately predict engine component temperatures. Accurately predicting temperature distribution in the cavity is important because temperatures directly affect the material properties including Young's modulus, yield strength, fatigue strength, creep properties. All of these properties directly affect the life of critical engine components. In addition, temperatures cause thermal expansion which changes clearances and in turn affects engine efficiency. The DCC is fed from the last stage of the high pressure compressor. One of its primary functions is to purge the air over the rotor wall to prevent it from overheating. Aero-thermal conditions within the DCC cavity are particularly challenging to predict due to the complex air flow and high heat transfer in the rotating component. Thus, in order to accurately predict metal temperatures a two-way coupled CFD-FE analysis is needed. Historically, when the cavity airflow is modeled for engine design purposes, the inlet condition has been over-simplified for the CFD analysis which impacts the results, particularly in the region around the compressor disc rim. The inlet is typically simplified by circumferentially averaging the velocity field at the inlet to the cavity which removes the effect of pressure wakes from the upstream rotor blades. The way in which these non-axisymmetric flow characteristics affect metal temperatures is not well understood. In addition, a constant air temperature scaled from a previous analysis is used as the simplified cavity inlet air temperature. Therefore, the objectives of this study are: (a) model the DCC cavity with a more physically representative inlet condition while coupling the solid thermal analysis and compressible air flow analysis that includes the fluid velocity, pressure, and temperature fields; (b) run a coupled analysis whose boundary conditions come from computational models, rather than thermocouple data; (c) validate the model using available experimental data; and (d) based on the validation, determine if the model can be used to predict air inlet and metal temperatures for new engine geometries. Verification with experimental results showed that the coupled analysis with the 3D no-bolt CFD model with predictive boundary conditions, over-predicted the HP6 offtake temperature by 16k. The maximum error was an over-prediction of 50k while the average error was 17k. The predictive model with 3D bolts also predicted cavity temperatures with an average error of 17k. For the two CFD models with predicted boundary conditions, the case without bolts performed better than the case with bolts. This is due to the flow errors caused by placing stationary bolts in a rotating reference frame. Therefore it is recommended that this type of analysis only be attempted for drive cone cavities with no bolts or shielded bolts.
Ramachandran, Subbaratnam. "Heat transfer and modelling studies for the analysis of waste storage facilities." 1985. http://hdl.handle.net/2097/27520.
Повний текст джерелаZhang, Yi. "Atomistic and finite element modeling of zirconia for thermal barrier coating applications." Thesis, 2014. http://hdl.handle.net/1805/6191.
Повний текст джерелаZirconia (ZrO2) is an important ceramic material with a broad range of applications. Due to its high melting temperature, low thermal conductivity, and high-temperature stability, zirconia based ceramics have been widely used for thermal barrier coatings (TBCs). When TBC is exposed to thermal cycling during real applications, the TBC may fail due to several mechanisms: (1) phase transformation into yttrium-rich and yttrium-depleted regions, When the yttrium-rich region produces pure zirconia domains that transform between monoclinic and tetragonal phases upon thermal cycling; and (2) cracking of the coating due to stress induced by erosion. The mechanism of erosion involves gross plastic damage within the TBC, often leading to ceramic loss and/or cracks down to the bond coat. The damage mechanisms are related to service parameters, including TBC material properties, temperature, velocity, particle size, and impact angle. The goal of this thesis is to understand the structural and mechanical properties of the thermal barrier coating material, thus increasing the service lifetime of gas turbine engines. To this end, it is critical to study the fundamental properties and potential failure mechanisms of zirconia. This thesis is focused on investigating the structural and mechanical properties of zirconia. There are mainly two parts studied in this paper, (1) ab initio calculations of thermodynamic properties of both monoclinic and tetragonal phase zirconia, and monoclinic-to-tetragonal phase transformation, and (2) image-based finite element simulation of the indentation process of yttria-stabilized zirconia. In the first part of this study, the structural properties, including lattice parameter, band structure, density of state, as well as elastic constants for both monoclinic and tetragonal zirconia have been computed. The pressure-dependent phase transition between tetragonal (t-ZrO2) and cubic zirconia (c-ZrO2) has been calculated using the density function theory (DFT) method. Phase transformation is defined by the band structure and tetragonal distortion changes. The results predict a transition from a monoclinic structure to a fluorite-type cubic structure at the pressure of 37 GPa. Thermodynamic property calculations of monoclinic zirconia (m-ZrO2) were also carried out. Temperature-dependent heat capacity, entropy, free energy, Debye temperature of monoclinic zirconia, from 0 to 1000 K, were computed, and they compared well with those reported in the literature. Moreover, the atomistic simulations correctly predicted the phase transitions of m-ZrO2 under compressive pressures ranging from 0 to 70 GPa. The phase transition pressures of monoclinic to orthorhombic I (3 GPa), orthorhombic I to orthorhombic II (8 GPa), orthorhombic II to tetragonal (37 GPa), and stable tetragonal phases (37-60 GPa) are in excellent agreement with experimental data. In the second part of this study, the mechanical response of yttria-stabilized zirconia under Rockwell superficial indentation was studied. The microstructure image based finite element method was used to validate the model using a composite cermet material. Then, the finite element model of Rockwell indentation of yttria-stabilized zirconia was developed, and the result was compared with experimental hardness data.