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 11 of 11 for “"subcritical flow"”.
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Impact of water wheel hydrokinetic unit spacing on hydraulic conditions in a rectangular canal under mild slope subcritical flow with physical modeling
… hydrokinetics uses the kinetic energy from flowing water (e.g., wave tides, streams, canals). Previous research covered the hydraulic impacts and practical limitations of hydrokinetics through field studies, but had a limited understanding of appropriate installation locations and the …
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Velocity characteristics in the wake of an oscillating cylinder
… are conducted at a towing speed within the subcritical flow regime at Re ~ 3 x 104. This thesis explores the connection between these downstream velocity properties and the vortex-induced vibrations of the cylinder. In addition to downstream velocities, experimental data include lift and …
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Suspended sediment erosion in laboratory flume experiments
… and suspended load at a variety of water flows and sediment fluxes. Sediment samples were collected to determine mass flux and concentration profiles. Erosion was measured between each timestep and erosion rate determined for a variety of conditions. Rouse, Froude, and Stokes numbers were …
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Spatial and temporal variability of tide-induced salt flux in a partially mixed estuary
… of tidal salt flux scales with the river flow and has no clear dependence on the spring-neap tidal forcing. The diffusive fraction, ν, has a value of -0.25 to 0.46 in the lower estuary, increasing to -0.23 to 1 near the head of salt. The phase lag between tidal salinity and velocity is …
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Spatial and temporal variability of tide-induced salt flux in a partially mixed estuary
… of tidal salt flux scales with the river flow and has no clear dependence on the spring-neap tidal forcing. The diffusive fraction, ?, has a value of -0.25 to 0.46 in the lower estuary, increasing to -0.23 to 1 near the head of salt. The phase lag between tidal salinity and velocity is …
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ΕΞΟΜΟΙΩΣΗ ΡΟΙΚΟΥ ΠΕΔΙΟΥ ΑΞΟΝΟΣΥΜΜΕΤΡΙΚΩΝ ΣΩΜΑΤΩΝ ΣΕ ΘΑΛΑΜΟ ΜΕΤΡΗΣΕΩΝ ΑΕΡΟΣΗΡΑΓΓΑΣ
STUDY OF THE CALCULATION OF THE SUBCRITICAL FLOW-FIELD AROUND AXISYMMETRIC BODYWITHIN A WORKING SECTION OF A RECTANGULAR CROSS SECTION AND TO THE SIMULATION OF THE UNCONFINED FLOW PATTERN APPLYING THE CONTOURED WALL TECHNIQUE FOR THE MINIMIZATION OF THE WALL INTERFERENCE. THE CONFINED AND POTENTIAL …
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Abrasion Prediction at Kayraktepe Sediment Bypass Tunnel in Turkey
… value due to its development according to the subcritical flow conditions. In Kayraktepe dam, the flow condition in sediment bypass tunnels are supercritical flow, thus the Sklar and Dietrich (2004) model does not fit for abrasion estimation. Modifications are made to the Sklar and Dietrich …
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Characterizing Hydrodynamic Interactions of Underwater Vehicles in Close Proximity Using an Identical Ellipse Pair
… method simulator in a viscous, rotational flow at Re=1500. Interactions in tandem, side-by-side, and staggered arrangements were characterized based on changes to the drag, lift, and yaw moment coefficients experienced by the ellipses. The drag and lift results agreed with existing studies …
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On the Local Heat Transfer Behavior of Supercritical Carbon Dioxide
… carbon dioxide (sCO2) is performed. Flows relevant to heat transfer devices, such as sCO2 heaters, recuperators, and internally cooled turbine blades are studied, with particular attention paid to data reduction methodology, and the use of appropriate reference quantities, …
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Scale effects in testing of a monopile support structure submerged in tidal currents.
… challenge facing the technology due to turbulent flow in tidal currents environment and scaling is a fundamental engineering procedure for prototype development and optimisation for cost effectiveness. This thesis presents the outcome from investigating Dimensional Scale Effects (DSE) and …
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Characterizing flow resistance in high gradient mountain streams, Fraser Experimental Forest, Colorado
… mountain streams dissipate energy when water flows over poorly sorted grains in the bed and banks and over bedforms such as steps and pools, creating a constant alternation between supercritical and subcritical flow and causing energy dissipation through hydraulic jumps. Mountain streams (bed …