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 12 of 12 for “"Engineering, Marine and Ocean"”.
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A Study of Spherical Bubbles in a Vertical Turbulent Boundary Layer
… such that the instantaneous liquid velocity and bubble trajectories could be accurately determined. Bubble velocity, acceleration, and buoyancy force were obtained from the trajectory data. Analysis of the force results indicate that drag coefficient decreases with increasing Reynolds number, …
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Numerical Solutions of Nonlinear Potential Flows With Free Surfaces
Made available in DSpace on 2014-12-14T04:42:01Z (GMT). No. of bitstreams: 1 7708911.pdf: 2205365 bytes, checksum: 4acfe8e0516e97bcd3ac34f83c640efa (MD5) Previous issue date: 1976
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Coagulation between fractal aggregates and small particles and fractal properties of marine particles
… dissertation includes two parts (designated A and B) that serve two separate but related research purposes. In Part A, coagulation rates between fractal aggregates (200-1000 μm) and small (1.48 μm) particles were studied for collisions induced by differential sedimentation and turbulent fluid …
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An active-path-dissolution model for corrosion-fatigue cracking of drill-pipe steels in offshore drilling environments
… notching process, microcrack development, and macroscopic crack growth. The first two processes are combined with mechanical fatigue to simulate corrosion-fatigue crack initiation. A series of fatigue-life simulations for a variety of corrosion-fatigue conditions were carried out. The …
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Layer-averaged modeling of turbidity currents with a finite element method
… flowing in deep ambient water. Since the standard Galerkin method yields spurious oscillations when applied to convection-dominated flows, the dissipative-Galerkin technique which has a selective damping property, is used. In order to track the moving front numerically, a node-adding method …
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Sistemas integrados de la navegación mediante redes locales inalámbricas
… design of Wireless Local Area Networks (WLANs) and puts forward one particular configuration suitable for Integrated Navigation Systems (INSs).The choice of the Extremely High Frequency band (EHF) is based on two fundamental reasons. Firstly, EHF waves range from 30 to 300 GHz, which makes …
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Flow through and around fish farming nets
… fluid dynamics (CFD) modeling, tow tank and field measurements were used to investigate current flow through and around net panels and cages. For the numerical computations a porous media model was used to represent the net allowing efficient computation of both exterior and interior flow …
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Determination of geotechnical properties of seafloor sediment using a free fall penetrometer
… a cylindrical probe free falling to the seafloor and to utilize the data obtained to evaluate the engineering properties of surficial sediment. Two experimental probes, each equipped with accelerometers, pressure sensors and optical backscatter sensors were deployed in different sediment regimes. …
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A model for backscattering angular response of gassy sediments: Applications to petroleum exploration and development programs
<p>The location and distribution of near-surface gas in continental margins is of particular interest for oil exploration and development programs. The presence of gas seepages can be evidence of the possible existence of subsurface hydrocarbon reservoirs. Gas is also a potential hazard for …
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Development of engineering tools to analyze and design flexible structures in open ocean environments
… to effectively predict system response in marine settings are critical in the engineering design process. The high energy ocean environment can subject structures to large wave and current forces, causing complex coupled motions and loads. This research focused on the development of …
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Dynamics of phytoplankton community composition in the western Gulf of Maine
… of phytoplankton community composition to marine biogeochemistry and ecosystem processes and motivated by the need to understand their distributions on regional to global scales. The ultimate goal was to predict surface phytoplankton communities using satellite remote sensing by relating …