Browsing by Department "Ocean Engineering"
Now showing items 1-20 of 78
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(2021-04-26)This thesis presents a method to upscale the NREL 5 MW reference wind turbine and the OC4 reference semisubmersible from 5 MW to 15 MW. The basis for the upscaling method is an assumption for the overturning moment scaling ...
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(2023-03-20)High-order discontinuous spectral element methods provide a potential direction for drastically reducing the computational cost of simulating complex unsteady fluid flows due to their high accuracy, geometric flexibility, ...
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(2022-07-27)In this study, computational fluid dynamics (CFD) simulations were performed using the Fluent and Mechanic module of ANSYS application to characterize the aerodynamic and static behavior of a horizontal axis wind turbine ...
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(2022-12-07)Barrier islands are dynamic coastal landscapes that protect beach communities and low-energy environments from storms. This role of a barrier system is mainly controlled by its elevation, the result of delicate coupling ...
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(2021-05-03)Nonnegative least squares problems (NNLS) which are least squares solutions that are constrained to take nonnegative values often arise in many applications like image processing, data mining, etc. There have been several ...
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(2020-10-30)Arrays of closely spaced slender cylindrical-shaped structural elements such as marine risers, TLP tendons, and horizontal pipelines are widely used in many offshore applications. Their response behavior subjected to ...
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(2022-12-10)Autonomous Underwater Vehicles (AUVs) are playing a larger and larger role in national defense. AUVs equipped with Artificial Intelligence (AI) are capable of numerous useful cognitive tasks, but there are some mission ...
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(2017-12-14)The push for optimizing current technology in semisubmersible system enables reduction in semisubmersible overall size. One field that see potential optimization is the riser operation philosophy, which in certain cases ...
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(2017-12-08)This thesis presents a method of applying “Shape Memory Alloy” (SMA) on an overtopping wave energy converter (OWEC). A control system which can fit all sea states is necessary for OWEC to adapt to a mutative wave condition ...
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(2018-06-14)Bulbous bows are widely used in the naval hydrodynamics. It can reduce the resistance of ships, thus it can reduce the costs and exhaust emission. The numerical calculation of wave resistance for ships with bulbous bows ...
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(2022-07-26)Exploration and economic activities in the ocean environment have steadily increased in recent years, motivating the need for safer, more efficient methods to operate, survey, and gather underwater data. Autonomous Underwater ...
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(2017-04-18)This thesis presents a 3D numerical simulation for a Free Standing Hybrid Riser under Vortex Induced Vibration, with prescribed motion on the top to replace the motion of the buoyancy can. The model is calculated using a ...
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(2017-05-08)Mechanical clamshell dredges are a versatile platform for performing dredging operations. The relative mobility, suitability of use for a variety of sediment types, and deep dredging capability result in the use of mechanical ...
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(2022-12-09)Video monitoring is essential for a variety of coastal research. While monitoring can provide a wealth of information about coastal processes, extracting relevant information from in-situ beach photography remains challenging. ...
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(2023-08-10)Mass transfer between bubbles and the surrounding ambient water is an important process in subsea blowouts and for predicting the fate of seepage from natural gas sources at the seabed. To understand the fundamental behavior ...
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(2023-08-08)In this work, Computational Fluid Dynamics (CFD) simulations are performed for three wind tunnel experiments, i.e., the NREL S826 airfoil experiment, the NTNU BT1 experiment, and the NTNU BT2 experiment by using two in-house ...
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(2021-04-06)A model is developed herein for predicting the onset of thermally induced buckling in the horizontal and vertical planes for rail structures. As described below, the model may be considered to be an extension of previous ...
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(2021-03-10)The Finite-Analytic Navier-Stokes (FANS) computational fluid dynamics (CFD) code is coupled with an in-house nonlinear finite element (FEM) mooring analysis program, MOORING3D, to study the dynamic responses of a floating ...
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(2016-12-08)The catenary anchor leg mooring (CALM) system is widely used as an efficient and economic single point mooring system in offshore engineering applications. CALM buoys are often connected to FPSOs with large flowlines for ...
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(2021-12-10)Vessel-generated waves are well-documented sources for a substantial amount of the energy impacting shorelines and embankments lining shipping channels. An approximately year-long study was conducted in Galveston Bay, Texas ...