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 “"Acoustic Doppler Velocimeter (ADV)"”.
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A novel trimodal sensor for eddy correlation measurements of benthic flux in aquatic environments
… benthic fluxes of dissolved oxygen, using an Acoustic Doppler Velocimeter (ADV) to measure water velocity and an oxygen microelectrode to measure concentration. Widespread application to a larger range of compounds is limited, however, by the lack of chemical sensors that are fast, small, and …
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Experimental Investigation of Steady Flows at a Breached Levee
… field are measured by a point gauge and an Acoustic Doppler Velocimeter (ADV), respectively. Time-averaged measured values of velocity field and free surface elevation are presented. In addition, Froude Number, turbulent kinetic energy (TKE) and bed shear stress are computed from the …
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Caracterización hidrodinámica de praderas naturales de macrófitos bentónicos en fondos someros afectados por mareas
… with a combination of in situ measurements (e.g. acoustic Doppler velocimeter (ADV) and dye tracer measurements) and flume tank experiments. Main results revealed that (1) the flow accelerates over the canopies, being partially explained by submergence conditions, (2) fragmentation of intertidal …
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Evaluation of the Interaction Between Flow Turbulence and Corrosive Material Transport Around Bridge Piers
… experimental approach was adopted: (1) Acoustic Doppler Velocimeter (ADV) measurements quantified average velocities and turbulence parameters around three-square piers, revealing accelerated flow and reduced turbulent structures near critical regions. Numerical simulations using the …
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Hydraulic Characterization of Mounded Gravel Fish Nests: Incipient Motion Criteria and Despiking Acoustic Doppler Velocimeter Data
… water flow velocities were measured with an acoustic Doppler velocimeter (ADV) in Tom's Creek, Blacksburg, Virginia, USA. ADVs are often used to collect in-situ turbulent velocity data. In almost all applications of ADVs, erroneous spikes are recorded during collection, which can …
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In the wake of a tidal turbine
… the wakes of scale model tidal turbines. An Acoustic Doppler Velocimeter (ADV) is used to profile the wakes of two turbines operating in six configurations: varying tip speed ratio, blade number, and including a device with contra rotating rotors. The wakes of various turbine configurations …
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Physical modeling of local scour around complex bridge piers
… field for each bridge model was measured by the acoustic Doppler velocimeter (ADV) to explain the complicated hydrodynamics of the flow field around bridge piers as guided by the results from a numerical model. In each physical model with river bathymetry, the comparison between the results of …
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Spectral feature classification of oceanographic processes using an autonomous underwater vehicle
… its cruise speed. In this respect, AUVs are advantageous compared with traditional oceanographic platforms. Based on the mingled spectrum principle, a parametric tool for designing an AUVbased spectral classifier is developed. An AUV's controllable speed tunes the separability between the …
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Fish passage design for Southern Hemisphere small-bodied fish: Hydrodynamic and behavioural assessment using spoiler baffles
… A high-frequency flow measurement using an acoustic Doppler velocimeter (ADV) at grid spacing of 5 × 4 cm along the streamwise and lateral direction provided a small-scale hydrodynamic characteristic for each patch. Flow parameters such as velocities, turbulent kinetic energy, Reynolds …
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Spectral feature classification of oceanographic processes using an autonomous underwater vehicle
… its cruise speed. In this respect, AUVs are advantageous compared with traditional oceanographic platforms. Based on the mingled spectrum principle, a parametric tool for designing an AUVbased spectral classifier is developed. An AUV's controllable speed tunes the separability between the …
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Boundary Shear Stress Along Vegetated Streambanks
… Velocity profiles were measured using an acoustic Doppler velocimeter (ADV) and a miniature propeller (MP). A flush-mounted Dantec MiniCTA system was used to measure shear stress at the streambank wall. The addition of vegetation on a sloping streambank increased the streamwise free stream …
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Computational fluid dynamics (CFD) and physical modelling of a metal refining process
… to predict vortex was also validated. An Acoustic Doppler Velocimeter (ADV) probe was used for the velocity measurement at various locations inside the water model and this gave valuable insight about the flow phenomena occurring inside the refining kettle. A particular important finding …
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The fluvial dynamics of compound meander bends
… loop over an 11-year period, coupled with Acoustic Doppler Velocimeter (ADV) measurements of 3-D instantaneous velocities for similar magnitude flows at the beginning and end of this period. Results confirm that this compound loop is highly dynamic with major changes in planform occurring …
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From meander bend to oxbow lake: morphodynamics and sedimentology of chute cutoffs
… The primary objective of this thesis is to advance understanding of chute cutoff morphodynamics through a process-based interpretation of the co-evolution of morphology, flow structure, and sedimentology in chute cutoff channels prior to bend abandonment. This objective is achieved through a …