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Tidal residual currents and sediment transport through multiple tidal inlets
Title
Tidal residual currents and sediment transport through multiple tidal inlets.
Creator
Liu, James T., Aubrey, David G., Harbor Branch Oceanographic Institute
Date Issued
1993
PURL
http://purl.flvc.org/FCLA/DT/3172972
Subject Headings
Tidal currents, Sediment transport, Tides, Inlets, Estuarine oceanography
Format
Document (PDF)
Longitudinal transport in a coastal lagoon
Title
Longitudinal transport in a coastal lagoon.
Creator
Smith, Ned P.
Date Issued
1990
PURL
http://purl.flvc.org/FCLA/DT/3173015
Subject Headings
Lagoons, Estuarine oceanography, Ocean circulation, Atmospheric circulation, Computer simulation
Format
Document (PDF)
A comparison of tidal harmonic constants computed at and near an inlet
Title
A comparison of tidal harmonic constants computed at and near an inlet.
Creator
Smith, Ned P.
Date Issued
1980
PURL
http://purl.flvc.org/FCLA/DT/3174482
Subject Headings
Inlets, Tides, Convection (Meteorology), Pressure --Measurement, Estuarine oceanography
Format
Document (PDF)
Studies of nontidal circulation in estuaries and coastal lagoons
Title
Studies of nontidal circulation in estuaries and coastal lagoons.
Creator
Smith, Ned P.
Date Issued
1993
PURL
http://purl.flvc.org/fau/fd/FA00007450
Subject Headings
Estuaries, Indian River (Fla. : Lagoon), Water currents--Measurement, Estuarine oceanography--Florida
Format
Document (PDF)
Hydrodynamics of mangrove root-type models
Title
Hydrodynamics of mangrove root-type models.
Creator
Kazemi, Amirkhosro, Curet, Oscar M., Florida Atlantic University, College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description
Mangrove trees play a prominent role in coastal tropic and subtropical regions, providing habitat for many organisms and protecting shorelines against storm surges, high winds, erosion, and tsunamis. The motivation of this proposal is to understand the complex interaction of mangrove roots during tidal flow conditions using simplified physical models. In this dissertation, the mangrove roots were modeled with a circular array of cylinders with different porosities and spacing ratios. In...
Show moreMangrove trees play a prominent role in coastal tropic and subtropical regions, providing habitat for many organisms and protecting shorelines against storm surges, high winds, erosion, and tsunamis. The motivation of this proposal is to understand the complex interaction of mangrove roots during tidal flow conditions using simplified physical models. In this dissertation, the mangrove roots were modeled with a circular array of cylinders with different porosities and spacing ratios. In addition, we modeled the flexibility of the roots by attaching rigid cylinders to hinge connectors. The models were tested in a water tunnel for a range of Reynolds number from 2200 to 11000. Additionally, we performed 2D flow visualization for different root models in a flowing soap film setup. We measured drag force and the instantanous streamwise velocity downstream of the models. Furthermore, we investigated the fluid dynamics downstream of the models using a 2-D time-resolved particle image velocimetry (PIV), and flow visualization. The result was analyzed to present time-averaged and time-resolved flow parameters including the velocity distribution, vorticity, streamline, Reynolds shear stress and turbulent kinetic energy. We found that the frequency of the vortex shedding increases as the diameter of the small cylinders decreases while the patch diameter is constant, therefore increasing the Strouhal number, St=fD/U By comparing the change of Strouhal numbers with a single solid cylinder, we introduced a new length scale, the “effective diameter”. In addition, the effective diameter of the patch decreases as the porosity increases. In addition, patch drag decreases linearly as the spacing ratio increases. For flexible cylinders, we found that a decrease in stiffness increases both patch drag and the wake deficit behind the patch in a similar fashion as increasing the blockage of the patch. The average drag coefficient decreased with increasing Reynolds number and with increasing porosity. We found that the Reynolds stress (−u′v′) peak is not only shifted in the vortex structure because of shear layer interference, but also the intensity was weakened by increasing the porosity, which causes a weakening of the buckling of vorticity layers leading to a decline in vortex strength as well as increase in wake elongation.
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Date Issued
2017
PURL
http://purl.flvc.org/fau/fd/FA00004948, http://purl.flvc.org/fau/fd/FA00004948
Subject Headings
Fluid mechanics., Atmospheric models., Ocean currents--Mathematical models., Sediment transport., Estuarine oceanography.
Format
Document (PDF)