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 8 of 8 for “"Velocity imaging"”.
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Packed bed reactors at the pellet scale: magnetic resonance studies of hydrodynamics, mass transport and reaction
… debate in literature regarding its value. An MR velocity imaging methodology is developed to acquire 3D images of the time-averaged velocity and turbulent kinetic energy for turbulent flows in packed beds of commercially relevant α-Al<sub>2</sub>O<sub>3</sub> pellets. The method is subsequently …
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Hydrodynamics of magnet-coil actuated robotic fish
… method in order to create caudal fin motion. A velocity imaging technique,, Particle Image Velocimetry (PIV), was used in order to characterize the wake structure created by the tail beat. Both robotic fish were towed through water as a high speed camera recorded the movement of seeding …
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Enhanced imaging of deep lithospheric and shallow near surface structures through innovations in seismic interferometry and array processing.
… studies that develop and apply passive seismic imaging methods to investigate Earth structure across a range of scales, from the shallow near-surface to the deep upper mantle. The first study uses array analysis of ambient noise autocorrelograms recorded by a dense nodal array near Sweetwater, …
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NMR studies of carbon dioxide sequestration in porous media
… LB simulations. In addition, magnetic resonance imaging (MRI) techniques were used to characterise the extent of CO2 trapping in the bead pack. The acquired NMR propagators were compared to LB simulations applied to various CO2 entrapment scenarios in order to investigate the pore morphology in …
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Acoustic Radiation Force Impulse Imaging of Myocardial Performance
… Acoustic radiation force impulse (ARFI) imaging has been demonstrated to be capable of visualizing variations in local stiffness within soft tissue. </p><p>In this thesis, the initial investigations into the visualization of myocardial performance with ARFI imaging are presented. …
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Thermographic particle image velocimetry: from phosphorescence to incandescence
… that enables simultaneous temperature and velocity imaging in flows with intentional seeded phosphor particles. This is highly attractive to researchers in fluid mechanics and combustion, as it directly visualizes the heat and mass transfer process in turbulent flows/flames. However, three …
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Fluid dynamics of single levitated drops by fast NMR techniques
… the droplets. Nuclear magnetic resonance (NMR) velocity imaging can give quantitative information about drop shape and velocities and is able to distinguish between different chemical compounds that will become relevant for the direct investigation of mass transfer. The potential of pulsed field …
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Digital Rock: Understanding the mechanism of Enhanced Oil Recovery (EOR) Core Floods
… lower than 10 ft d-1 using Magnetic Resonance Imaging (MRI). For that reason, an optimisation toolbox, which uses the relaxation times and the diffusion coefficients of the porous system as input and derives the optimum experimental parameters for the MRI sequence, was developed. The novel MRI …