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Showing 1 to 12 of 12 for “"oscillatory flows"”.
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The role of aquatic vegetation on oscillatory flows and sediment transport
… suspended sediment predictors for vegetated oscillatory flows compromise our capabilities for the prediction of sediment transport rates. To fill this knowledge gap, we investigate suspended sediment transport for non-cohesive sediments under the influence of flow-canopy interactions in …
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Boundary-layer analysis and measurement of Newtonian and non-Newtonian fluids
… the drag on a bluff body in drag-reducing flows is the turbulence intensity rather than the Reynolds number. For turbulence intensity less than 0.7% polymer addition induced delayed separation. For turbulence intensity over 1% the opposite effect was true. Time-averaged velocity profiles of …
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Experimental analysis of flow and turbulence characteristics in oscillatory boundary layers from LDV measurements
The oscillatory boundary layer represents a particular case of unsteady wall-bounded flows in which fluid particles follow a periodic sinusoidal motion. Unlike steady boundary layer flows, the flow regime and bed roughness character of oscillatory flows change in time during the oscillation, a …
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Effects of Posidonia oceanica seagrass on nearshore waves and wave-induced flows.
… oceanica on coastal waves and wave-induced flows, which has significant implications for coastal protection. Investigations were made on both a natural shallow Posidonia oceanica bed and, in controlled conditions of full-scale Posidonia mimics under regular and irregular waves. In the field, …
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On the hydrodynamics of flexible vegetation canopies
… is evaluated in both unidirectional and oscillatory flows driven by propagating surface waves. Overall, this allows enhanced quantification of mean currents and turbulence processes within and above flexible canopies, energy cascades, wave attenuation capacity, and canopy bulk drag. The …
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Analytical and experimental studies of plant-flow interaction at multiple scales
… consider both steady currents and wave-induced flows. For steady flows, the flow structure is significantly affected by canopy density. We define sparse and dense canopies based on the relative contribution of turbulent stress and canopy drag to the momentum balance. Within sparse canopies, …
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Linear and nonlinear stochastic differential equations with applications
… mean flow profiles. Constant, transient and oscillatory flows are considered. The smoothing approximation for solving linear stochastic differential equations is applied to several specific physical problems. The problem of a randomly perturbed quantum mechanical harmonic oscillator is …
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Application of a Novel Quasi-3D Microscopy Technique to Investigate Early Osteocyte Mechanotransduction Events
… thesis investigated the effects of steady and oscillatory flow on the actin and microtubule networks within the same cell. Shear strain was the predominant strain in both steady and oscillatory flows, in the form of viscoelastic creep and elastic oscillations, respectively. Under oscillatory …
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Computational modelling of vortex shedding flows
… CFD method for vortex shedding flows past square and circular cylinders. The overall approach can be regarded as a compromise between the accuracy and computational costs, especially for high-Reynolds number flows. The latter are modelled by variants of the k - E eddy-viscosity …
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Generation of sand ripples and sand bars by surface waves
… instability is locally similar to the cases for oscillatory flows and for purely progressive waves, and is driven by ripple-induced flow. But the intensity of this process varies spatially with the period of half the surface wavelength due to the reflection. The results show that beneath the …
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Rectified inertial forces on spherical particles in oscillatory fluid flows near interfaces
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-04-06 without embargo terms
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Flow, sediment transport and bedforms under combined flows
… a combination of unidirectional and wave-induced oscillatory flows, is omnipresent in natural environments and generates a range of bedforms on sandy beds. Combined-flow bedforms are abundant in coastal and lacustrine environments, as well as in their ancient counterparts in the rock record. …