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 10 of 10 for “"Flow curvature"”.
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The fluvial dynamics of confluent meander bends
… geometry is a controlling factor that influences flow structure, sediment transport, and bed morphology at river confluences. Previous experimental, field, and modeling studies of confluence dynamics have focused mainly on junctions formed by straight approach channels that meet at angular …
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Numerical Simulations and Studies on Round Jet Impingement, Twin Jet Impingement and Helicopter Rotor Blades Ground Effect
… is to study the difference of aerodynamics and flow physics between air jet impinging on water surface and ground surface at different low Mach number and Non-dimensional height. The incompressible Reynolds-Averaged Navier-Stokes equations with K-epsilon (k-ε) turbulence model are solved using …
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Extended Momentum Model for Single and Multiple Hydrokinetic Turbines in Subcritical Flows
… a series of two porous discs in open channel flows. The new model includes blockage ratio and Froude number as independent variables, which are inferred in advance to yield a single solution in the prescribed domain. The theoretical extension is integrated with the Blade Element Theory in a …
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Numerical, field and laboratory studies of three-dimensional flow structures at river channel confluences
… controls on and the nature of three-dimensional flow structures at river channel confluences. Previous work has shown that junction angle is an important control on the flow patterns at channel junctions since it affects the degree of curvature of flow from each tributary and sets up secondary …
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Impacts of channel curvature on drag, mixing, and stratification in estuaries
… often have sinuous planforms, and channel curvature can 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 …
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Impacts of Channel Curvature on Drag, Mixing, and Stratification in Estuaries
… often have sinuous planforms, and channel curvature can 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 …
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Unstructured mesh - finite volume algorithms for swirling, turbulent, reacting flows
… of three dimensional heat transfer and fluid flow problems using unstructured meshes. The method solves and stores all variables at the element centres which lowers storage requirements and generally shortens run times compared with the Control Volume-Finite Element approach. Correction terms …
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The Dynamics of Wave-Driven Reef Pass Jets and Coral Population Recovery on an Island
… On many reefs, wave-driven or tidal flow through reef passes is the dominant mechanism of exchange with the open ocean. The fate of the jet as it flows onto the forereef slope, however, is understudied. In this study, numerical simulations of wave-driven flow on an idealized coral …
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Vertical transport at curved ocean fronts
… the atmosphere. Because of Earth’s rotation, flow at ocean fronts tends to be directed parallel to the front and in geostrophic balance, with the Coriolis force balancing the cross-front pressure gradient. Since geostrophic flow is horizontally nondivergent, vertical motion relies on the …
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Experimental Investigations into the Fluid Dynamics and Forcing Underlying Cross-flow Turbine Operation
Within the wind and marine energy sectors, axial-flow (i.e., horizontal axis) turbines are a well-established and well-understood approach to converting the kinetic energy in a moving fluid to electricity. Recent cross-flow (i.e., vertical axis) turbine research has yielded substantial performance …