Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Engineering (2)
- Fluid Dynamics (2)
- Mechanical Engineering (2)
- Acoustics, Dynamics, and Controls (1)
- Applied Mathematics (1)
-
- Applied Mechanics (1)
- Computer-Aided Engineering and Design (1)
- Condensed Matter Physics (1)
- Controls and Control Theory (1)
- Electrical and Computer Engineering (1)
- Engineering Physics (1)
- Numerical Analysis and Computation (1)
- Ocean Engineering (1)
- Operations Research, Systems Engineering and Industrial Engineering (1)
- Ordinary Differential Equations and Applied Dynamics (1)
- Other Engineering (1)
- Other Mechanical Engineering (1)
- Other Physics (1)
- Partial Differential Equations (1)
- Systems Engineering (1)
- Keyword
-
- AUV (1)
- Anguilliform (1)
- Control theory (1)
- Existence and Uniqueness of Solutions (1)
- First-order implicit ODE (1)
-
- Fluid dynamics (1)
- GNSS (1)
- Generalized Burgers' equation (1)
- Hydrography (1)
- Ideal flow (1)
- Non-Newtonian fluid flows (1)
- Numerical solutions (1)
- Particle image velocimetry (1)
- Robotics (1)
- Roughness, bathymetry, spectrum, nonequispaced fast Fourier transform (1)
- Thermoelectric, Anisotropic, Materials, Transverse (1)
- Tides (1)
- Uncertainty (1)
- Virtual tide corrector (1)
Articles 1 - 5 of 5
Full-Text Articles in Physics
Computation Of A Virtual Tide Corrector To Support Vertical Adjustment Of Autonomous Underwater Vehicle Multibeam Sonar Data, Lawrence H. Haselmaier
Computation Of A Virtual Tide Corrector To Support Vertical Adjustment Of Autonomous Underwater Vehicle Multibeam Sonar Data, Lawrence H. Haselmaier
University of New Orleans Theses and Dissertations
One challenge for Autonomous Underwater Vehicle (AUV) multibeam surveying is the limited ability to assess internal vertical agreement rapidly and reliably. Applying an external ellipsoid reference to AUV multibeam data would allow for field comparisons. A method is established to merge ellipsoid height (EH) data collected by a surface vessel in close proximity to the AUV. The method is demonstrated over multiple collection missions in two separate areas. Virtual tide corrector values are derived using EH data collected by a boat and a measured ellipsoid to chart datum separation distance. Those values are compared to measurements by a traditional tide …
Parameterized Spectral Bathymetric Roughness Using The Nonequispaced Fast Fourier Transform, David H. Fabre
Parameterized Spectral Bathymetric Roughness Using The Nonequispaced Fast Fourier Transform, David H. Fabre
University of New Orleans Theses and Dissertations
The ocean and acoustic modeling community has specifically asked for roughness from bathymetry. An effort has been undertaken to provide what can be thought of as the high frequency content of bathymetry. By contrast, the low frequency content of bathymetry is the set of contours. The two-dimensional amplitude spectrum calculated with the nonequispaced fast Fourier transform (Kunis, 2006) is exploited as the statistic to provide several parameters of roughness following the method of Fox (1996). When an area is uniformly rough, it is termed isotropically rough. When an area exhibits lineation effects (like in a trough or a ridge line …
Developing And Testing An Anguilliform Robot Swimming With Theoretically High Hydrodynamic Efficiency, John B. Potts Iii
Developing And Testing An Anguilliform Robot Swimming With Theoretically High Hydrodynamic Efficiency, John B. Potts Iii
University of New Orleans Theses and Dissertations
An anguilliform swimming robot replicating an idealized motion is a complex marine vehicle necessitating both a theoretical and experimental analysis to completely understand its propulsion characteristics. The ideal anguilliform motion within is theorized to produce ``wakeless'' swimming (Vorus, 2011), a reactive swimming technique that produces thrust by accelerations of the added mass in the vicinity of the body. The net circulation for the unsteady motion is theorized to be eliminated.
The robot was designed to replicate the desired, theoretical motion by applying control theory methods. Independent joint control was used due to hardware limitations. The fluid velocity vectors in the …
Numerical Solutions Of Generalized Burgers' Equations For Some Incompressible Non-Newtonian Fluids, Yupeng Shu
Numerical Solutions Of Generalized Burgers' Equations For Some Incompressible Non-Newtonian Fluids, Yupeng Shu
University of New Orleans Theses and Dissertations
The author presents some generalized Burgers' equations for incompressible and isothermal flow of viscous non-Newtonian fluids based on the Cross model, the Carreau model, and the Power-Law model and some simple assumptions on the flows. The author numerically solves the traveling wave equations for the Cross model, the Carreau model, the Power-Law model by using industrial data. The author proves existence and uniqueness of solutions to the traveling wave equations of each of the three models. The author also provides numerical estimates of the shock thickness as well as maximum strain $\varepsilon_{11}$ for each of the fluids.
Transverse Thermoelectric Properties Of Cu/Mg2si And Ni/Mg2si Artificially Anisotropic Materials, David J N Esch
Transverse Thermoelectric Properties Of Cu/Mg2si And Ni/Mg2si Artificially Anisotropic Materials, David J N Esch
University of New Orleans Theses and Dissertations
In this thesis the spark plasma sintering process (SPS) was used to press Mg2Si powder with Ni and Cu slices into alternating layer stacks. These stacks, once cut at an angle, are an artificially anisotropic material. This anisotropy provides transverse thermoelectric properties to the sample. The transverse transport properties were measured along with the individual component transport properties. The SPS process provided malleable samples that gave a power factors of for the Ni/Mg2Si stack and for the Cu/Mg2Si stack. These fall short of the theoretical calculations which would give the power factors as .0254 …