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 20 of 25 for “"Secondary circulation"”.
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Mixing and secondary circulation in Juan de Fuca Strait
… m²s⁻¹ at interfacial depths in May. The mean circulation in Juan de Fuca Strait-depths is highly seasonal in nature, however, and larger values may be more appropriate in summer when the estuarine exchange peaks due to the freshet. Stronger friction is in turn associated with elevated mixing …
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Investigation of the positive interaction between the primary and secondary circulation and the roles of different types of precipitation in tropical cyclone formation
… investigates the coupling among the primary circulation, secondary circulation and precipitation during tropical cyclogenesis through analyses of satellite data and cloud-representing numerical model simulations. Previous studies have emphasized the importance of the positive feedback between …
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Impacts of channel curvature on drag, mixing, and stratification in estuaries
… lead to distinct flow processes in bends, e.g., secondary circulation and flow separation. An integrated approach combining field observations, idealized modeling, and realistic modeling is used to understand how curvature-induced flow processes affect hydrodynamic drag, salinity mixing, and …
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Impacts of Channel Curvature on Drag, Mixing, and Stratification in Estuaries
… lead to distinct flow processes in bends, e.g., secondary circulation and flow separation. An integrated approach combining field observations, idealized modeling, and realistic modeling is used to understand how curvature-induced flow processes affect hydrodynamic drag, salinity mixing, and …
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Investigation of selected variables from the primary and secondary circulatory systems in rainbow trout (Oncorhynchus mykiss)
… which utilize a cannulating method for the secondary circulation. A modification of a new method for cannulating the secondary system in rainbow trout (Oncorhynchus mykiss) is described. A T-shaped catheter was placed inside the lateral cutaneous vessel, thereby allowing multiple samples to …
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Numerical, field and laboratory studies of three-dimensional flow structures at river channel confluences
… of flow from each tributary and sets up secondary circulation cells similar to those in meander bends. Recent work has highlighted the common occurrence of, and importance of, bed discordance at river confluences due to a significant difference in bed levels of one or both tributaries …
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The Genesis and Evolution of African Easterly Waves
… the unstable wave. It has a thermally indirect secondary circulation centering at about 550 mb and a thermally direct circulation centering at about 850 mb. The effect of the self-induced latent heating strongly depends upon the particular baroclinic structure. The growth rate, the propagation …
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Deep explosive volcanism on the Gakkel Ridge and seismological constraints on shallow recharge at TAG active mound
… driven by anhydrite deposition in the shallow secondary circulation system. Exit fluid temperatures recorded at diffuse vents on the mound during the microearthquake study are used to explore linkages between seismicity and venting.
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Deep explosive volcanism on the Gakkel Ridge and seismological constraints on Shallow Recharge at TAG Active Mound
… driven by anhydrite deposition in the shallow secondary circulation system. Exit fluid temperatures recorded at diffuse vents on the mound during the microearthquake study are used to explore linkages between seismicity and venting.
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Diapycnal advection by double diffusion and turbulence in the ocean
… advection in an inverse model for the steady circulation. The inverse model solution reveals the presence of a secondary circulation with zonal character. These results suggest that mixing in abyssal canyons plays an important role in the mass budget of Antarctic Bottom Water.
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Mean Flow and Turbulence Characteristics of Pool -Riffle Structures in Low -Gradient Streams
… of patterns of flow convergence and divergence, secondary circulation, wall shear stresses and turbulence, specific of each configuration. Implications for sediment transport, bed and bank morphology and aquatic habitat are discussed. Some of the results presented in this work have been used as a …
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Diapycnal advection by double diffusion and turbulence in the ocean
… advection in an inverse model for the steady circulation. The inverse model solution reveals the presence of a secondary circulation with zonal character. These results suggest that mixing in abyssal canyons plays an important role in the mass budget of Antarctic Bottom Water.
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Interactions between currents and the spatial structure of aquatic vegetation
… channel showed clear patterns of erosion. The secondary circulation present in the meander was significantly altered as well. In the second study, the relationship between tidal currents and the spatial distribution of seagrass meadows is examined. Seagrass beds range in their coverage from …
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Investigation of the effect of a circular patch of vegetation on turbulence generation and sediment deposition using four case studies
… In addition, for the flexible submerged cases, a secondary circulation is generated with flow moving laterally away from the patch at the surface and toward the centerline of the patch at the bed.
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The impact of upper tropospheric temperatures and radiation on idealized tropical cyclones
… is hypothesized that a balanced response in the secondary circulation described by the Eliassen equation arises from upper troposphere radiative cooling/heating anomalies that leads to stronger tangential winds. The results of this study further suggest that cloud-radiative feedbacks have a …
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Investigation of the effect of a circular patch of vegetation on turbulence generation and sediment deposition using four case studies
… In addition, for the flexible submerged cases, a secondary circulation is generated with flow moving laterally away from the patch at the surface and toward the centerline of the patch at the bed.
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Flow structure of an asymmetric large river confluence
… of the incoming flows and to the effects of secondary circulation cells. The scour hole location and geometry within this confluence hydrodynamic zone are subject to change depending on the relative momentum of the two rivers with the zone of scour shifting outward and enlarging as the …
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An Ensemble Numerical Modeling Study of Alantic Basin Hurricane Intensification
… predicted to respond to an increased primary and secondary circulation, an increased warm core, a raised tropopause and moistening of rain bands with an increased forecast intensity. Perturbed initial conditions show a linear model response for small perturbations but also signs of non-linearity …
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Characterization of the role of precipitation in tropical cyclone intensification
… across these mechanisms is the role of the secondary circulation in terms of intensifying the vortex through the aggregation of moisture, vorticity, and angular momentum. The secondary circulation is governed by the latent heat release associated with hydrometeor phase transitions within its …
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Observations of misovortices within the 7 January 2014 Long Lake-Axis-Parallel lake-effect snow band during the Ontario Winter Lake-effect Systems Project
… that likely originate from solenoidally-forced secondary circulations within these warm-core bands. In most cases, the shear zone is co-located with a sharp horizontal gradient in radar reflectivity, which corresponds to the region of maximum vertical velocities. One particular band from the …
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