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 14 of 14 for “"numerical and analytical models"”.
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Arrayed microfluidic actuation for active sorting of fluid bed particulates
… biochemical, environmental, defense, and medical. Thermal vapor microbubbles have been shown to be a low power input with high work output fluidic actuation technique with demonstrated commercial applications in ink jet printing and optical switching. This thesis further develops …
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The use of detrital mineral thermochronology to explore relationships among climate, erosion, and tectonics in the Nepal Himalaya
Numerical and analytical models of orogenic growth suggest that erosion can focus deformation in active convergent orogens, leading to a debate over the relative influence of climatic and tectonic forcing on erosion. In this thesis, geologic and observations, thermochronology, and thermo-kinematic …
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Real-time monitoring of cement sheath integrity under high-angle HPHT wellbore conditions.
… a massive challenge today. The cement plugs in abandoned wells, in conjunction with the annular cement sheath, need to prevent leakages well beyond the life of the wellbore. The results of a recent engineering study of 15,500 wellbores in the Gulf of Mexico show that, as a wellbore turns fifteen …
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Low-Gravity Sloshing in Spherical Tanks: Experimental Investigation Toward Numerical and Analytical Modeling
… tanks can severely disturb vehicle attitude and dynamics, jeopardizing critical proximity maneuvers. Despite decades of research, the dynamics of low-gravity sloshing remain insufficiently understood and difficult to model with reliability, also due to limited and incomplete experimental …
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Thermoelastic stress analysis of laminated composite materials
… provided a scheme to identify the source and nature of the thermoelastic response. All of the material properties of the composite laminate were obtained experimentally, to aid an accurate assessment of each routine. The variation in the stress experienced by the laminate in the surface …
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Seismic response of adjacent structures on dry and saturated sand
… properties of the ground motion, the structure and the soil have been addressed. However, most of the studies in this field consider a stand-alone structure. This assumption is rarely justifiable in dense urban areas where structures are built close to one another. The dynamic interaction …
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Behaviour of High- and Ultra-High Performance Fibre Reinforced Concrete Flexural Members
… as the compressive strength increases and as such plain high-strength concrete always fails in an explosive manner. Incorporation of randomly distributed discrete non-metallic or metallic fibres into conventional concrete mixes has now been well-recognized as a feasible solution to …
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Spin-torque induced high frequency excitations and switching in spin-valve nanocontacts
… in the areas of mobile telecommunication and information- as well as in biomedical-technologies. In this device, a direct current flow through a nanocontact generates a spin polarized current in a spin-valve multilayer, which exerts a spin-transfer torque (STT) on the magnetic moments of a …
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Seismic experimental analyses and surrogate models of multi-component systems in special-risk industrial facilities
… that have a significant human, socio-economic and environmental impact. Besides, based on both observations of damage following recent major/moderate seismic events and numerical/experimental studies, it clearly emerges that critical non-structural components (NSCs) that are ubiquitous to most …
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Monitoring Sub-Surface Storage of Carbon Dioxide
… saline aquifer at the Sleipner carbon capture and storage project. A suite of time-lapse, three-dimensional seismic reflection surveys have been acquired over the injection site. This suite includes a pre-injection survey acquired in 1994 and seven post-injection surveys acquired between 1999 …
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Failure of sandwich honeycomb panels in bending
This thesis investigates failure in sandwich panels due to bending, specifically localised buckling or wrinkling, a predominant failure mechanism for thin gauge honeycomb sandwich panels loaded in bending or compression. Over the past 60 years, considerable work has been devoted to understanding …
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Structural & Internal Acoustic Response of Cylinders with Applications to Rocket Payload Fairings
… actuators to control the fairing vibration and the internal acoustic environment has been proposed. The control authority of these actuators for this problem has not yet been determined. To help determine the acoustic control authority of piezoelectric actuators mounted on a rocket fairing, …
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Multiscale Damage Modelling of Natural Fibre Composites
… including low density, renewability of sources, and full biodegradability when combined with polymers such as poly(lactic acid ). Environmental concerns and sustainability requirements have led to increased application of NFCs in load-bearing primary structures. Structural application of NFCs …
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Flow distribution in brazed plate heat exchangers
… in the heating, ventilating, air conditioning, and refrigeration (HVAC&R) industry for their compactness and high heat transfer coefficient. However, they suffer from the flow maldistribution among parallel plate channels. Especially when they are used as evaporators, the non-uniform …