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 14 of 14 for “"exchange flows"”.
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Exchange flows in an urban water body: Bayou St. John responses to the removal of flood control structures, future water elevation control, and water quality
… signal amplitudes that caused a lower tidal flow exchange from north to south. Bulk Richardson numbers showed mixing was inversely related to flow and the Bayou generally remains stratified. Resuspension of contaminated sediment could negatively impact the local ecology but predicted shear stress …
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Aquatic gravity currents through emergent vegetation
… and cooling can generate density-driven, lateral exchange flows in aquatic systems. Despite the ubiquity of wetlands and other types of aquatic canopies, few studies have examined the hydrodynamic effects of aquatic vegetation on these currents. This study investigates the dynamics of …
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Abyssal mixing from bottom boundary effects in Mid-Atlantic Ridge flank canyons
… is breaking internal waves generated by tidal flows over rough topography. However, intriguing observations, particularly from the Brazil Basin Tracer Release Experiment, suggest that mixing in the flank canyons of the Mid-Atlantic Ridge generated when strong mean flows interact with the many …
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Littoral wetlands and lake inflow dynamics
… changes from laterally well mixed during low flows to short-circuiting during storms, which in combination with a reduced nominal residence time undermines the wetland treatment performance. The second important physical mechanism is thermal mediation, i.e. the temperature modification of the …
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Abyssal mixing from bottom boundary effects in Mid-Atlantic Ridge flank canyons
… is breaking internal waves generated by tidal flows over rough topography. However, intriguing observations, particularly from the Brazil Basin Tracer Release Experiment, suggest that mixing in the flank canyons of the Mid-Atlantic Ridge generated when strong mean flows interact with the many …
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Waves and turbulence in sustained stratified shear flows
… this phenomenon by providing insight into real flows under controlled conditions. This dissertation addresses some aspects of the laboratory buoyancy-driven exchange flows through an inclined duct connecting two reservoirs containing fluids of different densities. We employ a novel experimental …
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We are not the periphery: barbarian economies and Northern Europe in the exchange patterns of Western Eurasia, 1800 BC - AD 900
Examination of long-term exchange patterns involving northern Europe and neighboring regions of western Eurasia reveals that the world of the North has, typically, played an important role both as producer and consumer. Especially in the Carolingian period (AD 700 - 900), the system as a whole can …
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Interface pinning of CO₂ gravity currents
… on the migration of CO₂ plume through exchange flow experiments of immiscible fluids. We show that capillarity leads to the development of striking features not present in miscible exchange flows, including a vertical pinned interface and sharp corners. We show that interface pinning is …
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Internal hydraulic jumps with upstream shear
Internal hydraulic jumps in flows with upstream shear are investigated numerically and theoretically. The role of upstream shear has not previously been thoroughly investigated, although it is important in many oceanographic flows such as exchange flows and stratified flow over topography. Several …
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Mechanics of exchange flow between open water and an aquatic canopy
… explored the magnitude and structure of these exchange flows for different forcing and vegetation distributions. The first project considers emergent vegetation with flow forced by a constant density difference. After a short inertial period, the discharge is controlled by the vegetative drag, …
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Internal hydraulic jumps with upstream shear
Internal hydraulic jumps in flows with upstream shear are investigated numerically and theoretically. The role of upstream shear has not previously been thoroughly investigated, although it is important in many oceanographic flows such as exchange flows and stratified flow over topography. Several …
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Unbalanced Exchange Flow
… while using little energy. This thesis considers exchange flow, a natural ventilation flow pattern that may occur at a horizontal opening in the ceiling of a room containing air that is warmer than the outside air temperature. Exchange flows are characterised by the simultaneous flow of air into …
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Hydrodynamics of a coral atoll lagoon and its connection to large-scale climate variability
… tidal to seasonal timescales, showing that tidal flows through the ~500 m-wide single, bifurcated channel dominate circulation in lagoon regions near the channel and maintain water properties there close to those of the open ocean. The tidal influence weakens toward the more isolated lagoon …
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Essays in Microstructure Analysis in the Foreign Exchange Market
… thesis is to investigate the effects of foreign exchange order flows on exchange rate and stock market changes, in particular to examine the forecasting power of order flows and better understand the nature of the private information conveyed in order flows in the foreign exchange market. Chapter …