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.
Results
Showing 1 to 20 of 88 for “"Numerical tools"”.
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Numerical tools for rate-cost-quality analysis of laser-based additive manufacturing
… the computational design and decision-making tools developed here will enable optimal use of AM in real-world, production contexts. Given the complexity of designing for AM, these results produce valuable insight into otherwise complicated relationships between rate, cost and quality for SLM. …
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Computational modeling of extravascular platelet aggregation under flow
… blood vessel, are not well understood and lack numerical tools to study them. In this research, we develop and validate numerical tools to study extravascular platelet aggregation based on the design of a microfluidic "bleeding chip'' device via the finite element method. Key model developments …
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Study of unstable rock failures using finite difference and discrete element methods, A
… failures through the application of various numerical methods. The direction of the current research is to extend these methods and to develop improved numerical tools with which to study unstable failures in underground mining layouts. An extensive study is first conducted on the expression …
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Design And Optimization Of Nano-optical Elements By Coupling Fabrication To Optical Behavior
… over the last decade, largely due to improved numerical modeling and advances in fabrication technologies. To this day, fabrication and optical behavior remain decoupled during the design phase and numerous assumptions are made about "perfect" geometry. As research moves from theory to real …
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Homogenization of a Cracked Poroelastic Medium - Numerical calculation of the coefficients and damage
… asymptotic expansions and the posterior use of numerical tools in order to get the coe cients for an homogeneous macroscopic model starting from heterogeneous microscopic description. The particular problem of this project is a cracked poroelastic medium, that is a Biot-type problem both in the …
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Experimental and numerical developments in predicting the crashworthiness of Formula One composite structures
… level of crashworthiness. The commercial design tools currently available to F1 teams have not yet been properly assessed in terms of their ability to predict composite crushing in a reliable and cost-effective manner. There is also a general lack of publicly available experimental and numerical …
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Numerical simulation of dynamic centrifuge tests on concrete faced rockfill dam
… seismic loads. To make up for these limitations, numerical tools can give valuable insight into how CFRDs respond to both static and seismic loading conditions. This thesis utilizes numerical simulations using finite element method to study nonlinear dynamic responses of CFRDs. The first part of …
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Transport and seismoelectric properties of porous permeable rock : numerical modeling and laboratory measurements
… without much ambiguity. In this thesis, we build numerical tools to compute a range of transport properties and pore geometry parameters (e.g., porosity, electrical conductivity, hydraulic permeability, pore surface area) on the microstructures from basic physical laws. A staggered-grid finite …
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ΔB₀ Field Control in High Field MRI with Local Multcoil Shim Arrays
… to accelerate calibration by over 50 fold. The numerical tools developed for calibration also proved useful for design to enable novel upper bounds on ΔB₀ shim performance and new tools for automatic application and anatomy-specific local multicoil array design.
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Asymmetries in extragalactic radio sources
… This entailed putting together a large number of numerical tools before such simulations could be performed. The thesis was structured to be a set of papers, each addressing a computational or astrophysical issue that was important in completing the objective of this thesis. Three chapters on …
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Kinetics of surface growth and coupled diffusion in a continuum framework
… then use a combination of analytical and numerical tools to study growth in simple geometries.
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Modeling of nucleation-based stochastic processes in cellular systems
… and fast upgrade of computational hardware and numerical tools. Recent technological developments have led to single-cell experiments which allow us to probe the role of stochasticity in cellular processes. Stochastic modeling of the corresponding processes is thus an essential ingredient for …
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Thermomechanical Response of Shape Memory Alloy Hybrid Composites
… and (5) validation of the analytical and numerical tools developed in the study. The constitutive model developed to describe the mechanics of a SMAHC lamina captures the material nonlinearity with temperature of the SMA and matrix material if necessary. It is in a form that is amenable to …
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Carbon nanotube field effect transistors for power application
… are measured from experiments and extracted from numerical tools are added to the model. As an application, we compare the performance of CNTFETs with MOSFETs, both used as power transistors in a Buck DC-DC converter circuit.
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Effect of magnetic seed fields on Lyman Alpha emission from distant quasars
… To do so, we develop and use a series of numerical tools to analyze previously constructed cosmological MHD simulations that include state-of-the-art implementation of the relevant physical processes for galaxy formation. The inclusion of these physical mechanisms is crucial to get the …
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Granular sloshing absorbers for vibration control
… material properties and speed of rotation. A numerical model is also developed and validated, and can be used as a design tool for a large scale absorber. In this thesis a new and innovative passive damper design is proved on a small prototype and numerical tools required to implement a real …
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Binder Film Thickness Effect on Aggregate Contact Behavior
… modeling of asphalt mixture was reviewed and the numerical tools used to investigate the micromechanical behavior of asphalt mixture will also be introduced. By using the cabinet x-ray tomography system, the displacement and resistant force of a system of particles bonded by a thin layer binder …
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A two-dimensional fluid-structure coupling algorithm for the interaction of high-speed flows with open shells
… future light aerospace structures will require numerical tools to accurately describe the strongly coupled dynamics of the interactions between a light structure and a flow surrounding it. Specific examples include inflatable structures and parachutes used as deceleration devices during planet …
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The Environment Of Galaxies And Groups Of Galaxies
In this thesis, we employ two numerical tools - semi- analytical models and N-body plus hydrodynamical simulations of large scale structure and individual galaxies - to explore the underlying physics governing the formation and evolution of groups of galaxies, and the role of environment in …
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Real Options Models in Real Estate
… utilize a set of sophisticated mathematical and numerical tools to mathematically model problems. We find that for some problems, real options models only add minimal value to more traditional capital budgeting techniques such as the Net Present Value model. In other problems, we find that real …
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