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 19 of 19 for “"hydrodynamic modelling"”.
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The hydrodynamic modelling of an evolving sea
A model of a changing tidal regime in an evolving shallow sea such as the ancient North Sea is developed and solved analytically as a generalization of Taylor's problem. Characteristic scales and coefficients are treated as functions of historical time. The z dependency, dissipative and non-linear …
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Hydrodynamic modelling of the oscillating wave surge converter
This thesis investigates the numerical modelling of the Oscillating Wave Surge Converter (OWSC). The OWSC is a bottom hinged, flap-type, pitching wave energy converter. The device is installed in shallow water (10 - 15 metres} and covers the entire water column from the sea floor to the water …
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Nonlinear hydrodynamic modelling of wave energy converters under controlled conditions
… converter, both of which require mathematical hydrodynamic models that are able to correctly describe the WEC- uid interaction. On the one hand, the accuracy and representativeness of such models have a major in uence on the effectiveness of the WEC design. On the other hand, the computational …
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An integrated framework for hydrology-hydrodynamic modelling of the Barotse floodplains, upper Zambezi river basin.
… in understanding the wetland hydrological and hydrodynamic processes for the Barotse floodplains is ever increasing especially with the advent of climate change/variability. Despite several studies in the Upper Zambezi Basin, there was an absence of an integrated online (internal) framework for …
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An integrated framework for hydrology-hydrodynamic modelling of the Barotse floodplains, upper Zambezi river basin.
… in understanding the wetland hydrological and hydrodynamic processes for the Barotse floodplains is ever increasing especially with the advent of climate change/variability. Despite several studies in the Upper Zambezi Basin, there was an absence of an integrated online (internal) framework for …
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Geometric and hydrodynamic modelling of fluid-structural relationships in the southeastern Athabasca Basin, Saskatchewan, Canada, with implications for uranium ore genesis
… research involved 3-dimensional (3D) geometric modelling of the unconformity surface in the southeastern Athabasca Basin, in conjunction with basement structures interpreted from regional-scale geophysical data. The second phase was accomplished through 2-dimensional (2D) numerical modelling of …
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Analysis and Modelling of a Type II White-light Solar Flare
… and allow a deeper investigation using radiative hydrodynamic modelling.<br/> <br/> Radiative hydrodynamic simulations show that the observed flare signatures cannot be<br/>explained with ‘standard’ electron beams, since such beams deposit at least part of their energy in the upper chromosphere …
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Tidally Induced Transport Dynamics in a Wadden Sea Tidal Basin and Its Changes Under Future Sea Level Rise Scenarios
… These interactions create spatial structures of hydrodynamic connectivity that govern transport processes, ecological functioning, and the interpretation of long-term observations. However, the persistence of these structures under future sea level rise and changing wind conditions remains …
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Transport and retention of benthic marine invertebrates in the Southern Tauranga Basin
… populations may be more closed because of local hydrodynamic conditions causing larval retention within the source estuary. In this thesis, field observations and numerical simulations were used to investigate the effect of estuary morphology on the transport and retention of benthic invertebrate …
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Molecular dynamics-based approaches for mesoscale lubrication
… suggests that it is possible to extend pde-based hydrodynamic modelling of lubrication problems even to nanoscale films beyond the validity of the Navier-Stokes description. In other words, once the flow rate constitutive relation is obtained, lubrication problems in nanoscale films can be solved …
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Physical suitability of sites for community-scale tidal power generation
… drifter deployments, georectified imagery, hydrodynamic modelling and vessel-mounted ADCP transects allowed a comprehensive picture of peak ebb and flood hydrodynamics at Cuan Sound and the Falls of Lora. Horizontally expanding boundary layers and flow separation from the coast drove a …
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Numerical modelling of solute transport processes using higher order accurate finite difference schemes. Numerical treatment of flooding and drying in tidal flow simulations and higher order accurate finite difference modelling of the advection diffusion equation for solute transport predictions.
The modelling of the processes of advection and dispersion-diffusion is the most crucial factor in solute transport simulations. It is generally appreciated that the first order upwind difference scheme gives rise to excessive numerical diffusion, whereas the conventional second order central …
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Understanding the source and distribution of marine macro-plastics in coastal environments
… resulted in limited field data from this region. Hydrodynamic modelling offers a mechanism to explore such areas, and the interaction of marine litter with physical forces arising from ocean currents, and windage, and coupled with particle tracking models, can predict the trajectories and fate of …
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Numerical modelling of hydrodynamic and solute transport processes in shallow water environment
This thesis studies the numerical modelling of a range of hydrodynamic, solute transport and biochemical reaction processes in shallow water environment, combining both Euler and Lagrangian techniques. The research consists of two parts: the rapid flow modelling and the solute transport modelling. …
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Nutrient dynamics in shallow tidally-dominated estuaries
… and a dynamically coupled three-dimensional (3D) hydrodynamic-biogeochemical model. To gain insight in the short temporal variability in nutrient concentrations, 24-hourly measurements of dissolved nutrients were conducted over four periods (winter, summer, start of spring, and end of spring) …
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Künstliche neuronale Netze zur Beschreibung der hydrodynamischen Prozesse für den Hochwasserfall unter Berücksichtigung der Niederschlags-Abfluß-Prozesse im Zwischeneinzugsgebiet
Aus den Mängeln bisher verwendeter Modelle zur Abbildung des Wellenablaufes zu Prognosezwecken im Hochwasserfall wird in dieser Arbeit eine Methodik entwickelt, die die Schnelligkeit und Robustheit künstlicher neuronaler Netze mit der Zuverlässigkeit hydrodynamisch-numerischer Modellierung …
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An analysis of hydraulic, environmental and economic impacts of flood polder management at the Elbe River
… for their management. For this purpose, hydrodynamic and water quality modelling as well as an economic vulnerability assessment are employed in two study areas on the Middle Elbe River in Germany. One study area is an existing flood polder system on the tributary Havel, which was put …
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Oceanographic considerations for the management and protection of surfing breaks
… measurements, photography, and wave modelling were all applied to monitor sea floor morphology around the reef. Results showed that the beach-state has more cellular circulation since the reef was installed, and a groin effect on the offshore bar was caused by the structure within the …