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Showing 1 to 13 of 13 for “"conduction heat transfer"”.
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Transient boiler heat exchanger thermal behaviour analysis
… creep- fatigue aging. The boiler and its final heat exchangers and headers are the main components that are affected by these mechanisms. The aging of these components results in high maintenance costs, reduction of the plant reliability and availability, and contribute to increased safety risks …
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Reduced-basis output bound methods for parametrized partial differential equations
… symmetric coercive problems (e.g. problems in conduction heat transfer), parabolic problems (e.g. unsteady heat transfer), noncoercive problems (e.g. the reduced-wave, or Helmholtz, equation), the Stokes problem (e.g flow of highly viscous fluids), and certain nonlinear equations (e.g. …
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Nonlinear heat transfer and thermo mechanical stress analysis using finite elements.
… and testing of numerical procedures for the heat transfer and thermo-mechanical analysis of sol id continua. Steady state conduction heat transfer is developed as a particular case of the general field equation. Internal heat generation and the boundary conditions of specified temperatures, …
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AMoEBA: the adaptive modeling by evolving blocks algorithm
… match known profiles representing a steady-state conduction heat transfer problem and the fully-developed laminar flow through a pipe. To further illustrate the versatility of the algorithm, an inverse engineering problem was also solved. For this problem, AMoEBA placed different materials in the …
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CFD Simulations of an Air-Conditioned Radiological Materials Staging Room: Comparison Between COMSOL and ANSYS Codes
Heat-generating radiological material packages, such as the 9975 package and other packages, are stored in facilities managed by the National Nuclear Security Administration (NNSA). These packages must be stored in a ventilated facility to prevent the packages, internal components, and outer …
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Analytical solutions of the steady or unsteady heat conduction equation in industrial devices: A comparison with FEM results
Heat transfer is one of the most salient and fundamental research areas for any engineer, due to its ubiquity. Today the energy efficiency requirements are becoming more and more demanding. This motivates engineers to continuously improve the efficiency of heat transfer processes. For such analysis …
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Investigation of changes in permeability due to poro-thermo-elastic effects in enhanced geothermal reservoirs
… a poro-thermo-elastic framework. Time-dependent heat transfer is modelled based on conductive heat transfer within the reservoir rock and convective (including conduction) heat transfer in discrete fractures. Changes of stress due to injection and circulation of cold fluid is studied by using …
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Thermal Modelling of the Ventilation and Cooling inside Axial Flux Permanent Magnet Generators
… and convective sub-circuits, to model the conduction and convection heat transfers and temperature distributions in the radial and axial directions, within these machines. The conduction heat transfer between the solid components of these electrical machines is modelled by an annulus …
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Computational Modeling of Radiation Effects on Total Temperature Probes
… this sensor is characterized by errors due to conduction heat transfer from the sensing element, as well as errors associated with the flow over it. In particular in high temperature flows, the sensing element of the thermocouple will be much hotter than its surroundings, leading to radiation …
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Modeling, fabrication and optimization of optically transparent - thermally insulating silica aerogels for solar thermal applications
… By capturing the suns energy and using it to heat steam as part of a Rankine cycle, electrical energy can be renewably produced. Furthermore, solar thermal collectors have high potential for domestic heating when deployed at the rooftop scale, reducing fossil fuel consumption used for home …
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Inferencing Techniques for Enhanced Monitoring of Thermal-Fluid Systems
… employed physics-based methods to solve inverse heat transfer (IHT) problems. Because accurate and well-understood physics models provide strong prior knowledge, physics-based IHT can provide clear solution with use of small amount of temperature measurements. However, existing work in IHT relies …
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Experimental and Numerical Investigation of Tool Heating During Friction Stir Welding
The heat input to the tool has been investigated for friction stir welding (FSW) of aluminum alloy AL 7075-T7351 over a wide range of process operating parameters using a combined experimental/numerical approach. In a statistical Design of Experiments fashion, 54 experimental welds (bead-on-plate) …
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Untersuchungen an einer Kolbenexpansionsmaschine mit integrierten Wärmeübertragerflächen (Wärmeübertrager-Expander) zur Realisierung eines neuartigen Neon-Tieftemperatur-Prozesses
Viele Anwendungen der Hochtemperatur-Supraleitung arbeiten vorteilhaft im Temperaturbereich zwischen 30 - 50 K. Für diesen Temperaturbereich existieren nur wenige geeignete Kältemaschinen mit kleiner Kälteleistung (1-2 W) u. gutem Wirkungsgrad. Neon ist aufgrund seiner Stoffeigenschaften ein …