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 20 of 30 for “"Numerical and Experimental Studies"”.
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3-DIMENSIONAL NUMERICAL AND EXPERIMENTAL STUDIES TO MODEL ARTIFICIAL HEART VALVES HEMODYNAMICS
… details such as stagnation, recirculation zones and shear stresses. In this research, we established a numerical model using arbitrary Lagrangian Eulerien to study the hemodynamic performance of a bileaflet mechanical heart valve. The 3-dimensional numerical simulation was performed using …
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Numerical and experimental studies on the mechanical behaviour of the distal femur following total knee arthroplasty
… arthroplasty stretches back over 70 years. Many studies have shown that TKA is, in general, a successful operation for the relief of joint pain, with patient satisfaction rates of 90-95% and implant survival rates at 10-15 years of greater than 90%. However, a number of studies have also shown …
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Numerical and Experimental Studies of Natural Convective Heat Transfer From Vertical and Inclined Narrow Flat Plates and Short Cylinders
Natural convective heat transfer from flat plates and short cylinders inclined at an angle to the vertical in laminar and transition flow regions with isothermal or constant heat flux conditions have been numerically and experimentally studied. When the width of the plate is relatively small …
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A study of a piezoelectric energy harvesting system using magnetorheological fluids
… energy harvester. The study employed both numerical and experimental studies to investigate the effect of using the fluid in vibration energy harvesting. The results obtained show an increase in the output voltage and frequency of the device by 9.7% and 36%, respectively. For the first …
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Dynamic modelling of lightweight high-strength concrete under impact
This thesis presents numerical and experimental studies on modeling of lightweight high-strength concrete (LWHSC) under static and dynamic loadings. A new strain-based damage model is developed based on continuum damage mechanics. The proposed model incorporates the strain rate effects on various …
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Dimensional Stability of Multilayer Circuit Boards
Numerical and experimental studies are performed to study residual deformation and warpage in a model multilayer circuit board construction of a common composite substrate (7628 fabric style). A numerical procedure based on classical lamination theory with non-isothermal viscoelastic constitutive …
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Tide-influenced contaminant transport in coastal aquifers
… effects which cause complicated groundwater flow and contaminant transport phenomena in regions immediately adjacent to the coast. This study is designed to address the significance of tidal influence on contaminant transport by focusing on one-dimensional homogeneous coastal aquifers. This study …
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Numerical and Experimental Study of Pacemaker Safety under MRI
… with MRI RF (radio frequency) coil and human body model, novel techniques for the evaluation of MRI-induced heating or induced voltage in the vicinity of implanted metallic lead have been developed based on the reciprocity theorem. The measurement configurations have been described …
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Transition dynamics between the multiple steady states in natural ventilation systems : from theories to applications in optimal controls
… state behavior, an important observation in numerical and experimental studies in natural ventilation systems. The-oretical models are developed and their applications in numerical simulations and ventilation controls are presented. In a system with multiple steady states, how the system …
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Non-Field-of-View Acoustic Target Estimation
… (NFOV) sound source localization and tracking in indoor environments. The approach takes advantage of sound signal information to localize target position through auditory sensors combination with other sensors within grid-based recursive estimation structure for tracking using …
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Thermal-mechanical analysis of targets for high volume production of molybdenum-99 using low-enriched uranium
… reactor facilities located in foreign countries and use highly enriched uranium (HEU). The University of Missouri Research Reactor (MURR) is exploring the feasibility of high volume molybdenum-99 production at its facility. Current molybdenum-99 production uses HEU in a powder dispersion target. …
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Enhanced engine mechanical efficiency through tailoring of lubricant formulations to localized power cylinder wall conditions
Numerical and experimental studies were performed on an internal combustion engine power cylinder wall's lubricating oil film in order to assess the possibility of tailoring engine lubricants to specific engine configurations and operating conditions for significantly enhanced fuel economy without …
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Structural damage detection using signal-based pattern recognition
… due to aging, environmental loading, fatigue and excessive response. Such deterioration significantly affects the performance and safety of structure. Therefore, it is necessary to monitor the structural performance, detect and assess damages at the earliest possible stage in order to reduce …
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Simulations And Experiments Of Fuel Injection, Mixing And Combustion In Di Gasoline Engines
… (DI) has been known for its improved performance and efficiency in gasoline spark-ignition engines. In order to take all the advantages of the GDI technology, it is important to investigate in detail the interactions of fuel spray and combustion system, such as air-fuel mixing, in-cylinder flow …
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On-line Nonlinear Characterization of Anisotropic Materials
… proposed framework applies recursive estimation and a multi-linear model to characterize the nonlinear behavior of anisotropic materials on-line using full-field strains, which are capable of capturing the multi-axial information of anisotropic materials. A stochastic method is developed to …
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Numerical and experimental study on the ability of dynamic roughness to alter the development of a leading edge vortex
… turbines, high maneuvering military aircraft, and flapping wings. Dynamic stall occurs when an aerodynamic lifting device, such as an airfoil, wing, or turbomachine blade, undergoes a rapid pitching motion. It also occurs on lifting devices that are impulsively started at high angles of attack. …
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Modeling and Estimation of Linear and Nonlinear Piezoelectric Systems
… years can be classified into two categories, 1) studies of linear piezoelectric oscillator arrays, 2) studies of nonlinear piezoelectric oscillators. This dissertation derives novel linear and nonlinear modeling and estimation methods for such piezoelectric systems. In the first part, this work …
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Experimental and Novel Analytic Results for Couplings in Ordered Submicroscopic Systems: from Optomechanics to Thermomechanics
… multiscale problems arising in complex (and sometimes bioinspired) solids are presented. Such activities are supported by analytical, numerical and experimental studies. For instance, this is the case for studying the response of hierarchical and nano-composites, nanostructured …
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Distributed real-time hybrid simulation: Modeling, development and experimental validation
… become a recognized methodology for isolating and evaluating performance of critical structural components under potentially catastrophic events such as earthquakes. Although RTHS is efficient in its utilization of equipment and space compared to traditional testing methods such as shake table …
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