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 13 of 13 for “"Multi-physical"”.
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Multi-Physical Study of MEMS Resonators and Oscillators
<p>First, this research presents experimental and theoretical investigation of the response of micro scale dual-plate thermal-piezoresistive resonators (TPR) and self-sustained oscillators (TPO) to different gases and pressures. It is demonstrated that the resonant frequency of such devices follows …
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Design and Multi-physical Fields Analysis of High Speed Permanent Magnet Machines
… focuses on HSPMM design and research. Multi-physical fields analysis of a HSPMM is carried out to calculate machine power losses and temperature distribution, with factors influencing machine performance considered; HSPMM rotor mechanical research and analysis are also carried out and …
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Modello di calcolo multifisico per la progettazione dei requisiti acustici, energetici ed illuminazione naturale degli edifici
Multi physical calculation model for the design of acoustic requirements, energy and natural lighting of buildings interfaced with three-dimensional CAD architectural. The model calculates with single procedure the physical performance of buildings by taking the geometric information from the …
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Recovery Strategies and Flow Modeling in Fractured Grosmont Carbonates with High Permeability Conduits
… model, showing its possibility to describe the multi-physical flow in both free flow fractures and porous matrix. The application range and validity of Brinkman-Stokes multi-physical flow on karstified carbonates are discussed.
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Nonlinear Dynamics of Electrostatically and Magnetically Actuated MEMS
"The multi-physical nature of microelectromechanical Systems (MEMS) makes the development of CAD tools for MEMS a challenging area. Besides, the non-linear coupling between the different physical domains in MEMS can give rise to interesting non-linear dynamic properties. These non-linear …
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Study to characterise the performance of micro tubular solid oxide fuel cells by the invention of an avant garde experimental apparatus and computational modelling.
… cell temperature profiles. All of the above multi physical phenomena match very well to the experimental results. A key finding of the thesis is the importance of including radiation equations in the CFD models. Neglecting radiation can result in temperature errors of up to 200°C for a single …
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Design & development of innovative proton exchange membrane fuel cells
… conditions at 0.7 volts. All of the above multi physical phenomena match very well to the experimental results. This information is new to the area and should help optimise PEM fuel cell performance.
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Coupled thermo-hydro-mechanical behavior of glacial tills in shallow geothermal systems
… The purpose of this work is to conduct a multi-physical analysis to characterize the coupled thermo-hydro-mechanical behavior of glacial tills in central Illinois and suggest a constitutive model for describing their short- and long-term behavior. Four specimens of predominantly …
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JUSTGrid: a pure Java HPCC grid architecture for multi-physics solvers using complex geometries
… was outperformed by several other systems with multi-core 1 architectures. Top 1 in June 2009 is the RoadRunner build by IBM for the DOE/NNSA/LANL with a peak performance of 1456 TFIops. Multi-core processors are now build in every PC for the consumer market and not only for HPC systems. It …
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Electrically-assisted evaporation of charged fluids : fundamental modeling and studies on ionic liquids
… believed to owe most directly to an undeveloped physical understanding. While the physics that govern conventional colloid sources are at least functionally understood at this point, an analogous grasp of their ion relatives has proven elusive. The purpose of this thesis is to begin addressing …
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Data-Driven Modeling of Tracked Order Vibration in Turbofan Engine
… limited scope, when applying them to a complex multiscale multi-physical dynamical system. Moreover, for dynamical systems with external forcing, the identified model should not only be suitable for a specific forcing function, but should also generally approximate the input-output behavior of …
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Multi-Physics Sensing and Real-time Quality Control in Metal Additive Manufacturing
… For example, the lack of understanding of multi-physical melt pool dynamics fundamentally impedes the research progress. The scarcity of a customizable laser powder bed platform further restricts the possibility of testing the improvement strategies. Additionally, most state-of-the-art …
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Surface Acoustic Waves Propagation and Coupling Fields in Piezomagnetic and Piezoelectric Semiconductor Layered Structures
… properties. The core property of PSs is the multi-field coupling effect of mechanical-electro-carrier, and its multiple properties are adapting to the needs of the rapid development of electronic devices. In recent years, the research on multi-field coupling behaviors and waves modulation of …