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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 137 for “"Surface flow"”.
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Free surface flow over bottom topography
This thesis explores flow in a channel over a bottom topography. In particular, the problem of finding the shape of the unknown free-surface if the bottom topography is prescribed forms the main problem of this thesis. In chapter 2 the forced Korteweg De- Vries equation is derived from first …
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Free surface flow over a wavy bed.
Massachusetts Institute of Technology, Dept. of Civil Engineering, Thesis. 1965. M.S.
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Mechanics of Sandbag Motion In Free-Surface Flow
… of the motion of sandbags in open-channel flow is complex since the sandbag shape varies from a very flat hump to spherical, sandbags may be porous and permeable, and the water content of the sandbag may vary from being totally dry to almost fully saturated.</p> <p>The research reported in …
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Studies on Monolayer Properties: Diffusion, Viscosity, and Surface Flow
Made available in DSpace on 2014-12-08T23:18:18Z (GMT). No. of bitstreams: 1 6711883.pdf: 6646448 bytes, checksum: 441dc2e09552864e35c822d19570f391 (MD5) Previous issue date: 1967
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Visualization of Near-Surface Flow Patterns for Air-Water Gas Transfer
Near-surface flow patterns and their influence on local transport processes are investigated in a horizontal plane with visualization techniques. For this, a new method was developed that produces tracer particles with high effective Schmidt number (Sc = O(10^6) ) by chemical reaction directly at …
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Oilfield produced water treatment using constructed surface flow and wetland systems
Includes bibliographical references.
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Photoelastic study of dense granular free-surface flow rheology and size segregation
… individual particles within the bulk of 2D flows are quantified. The specific type of granular flow we study is gravity-driven, dry, and in the slow to intermediate regime. Here we describe a novel adaptation of the photoelastic technique and explain how we applied it in an original setup to …
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Distal Flow Deposits: Exploring Impact Related Surface Flow Morphologies Beyond the Layered Ejecta Blankets of Mars
… suggest. Around just a few source craters, surface flow morphologies beyond the layered and often rugged-textured continuous ejecta blanket have been reported and have been suggested to result from an extended continuous ejecta unit. Despite the recent identification of such deposits, it is …
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The harmonic excitation of a cylindrical bubble pinned to a plane surface: flow field and oscillation dynamics
… and subsequently describe the resulting steady flow that results in the fluid in the exterior of such a bubble. We first derive an analytical expression for the allowable shape oscillations of a two-dimensional bubble pinned to a wall, in the limit of a thin oscillatory boundary layer, based on …
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Free surface flow and application to the filling and solidification of liquid metals into vessels of arbitrary shape
… by waves and the breaking of the molten metal surface during filling must be avoided. Otherwise, substandard casting products will result which cost the foundry industry millions of pounds in lost revenue. A three-dimensional control-volume, free surface flow technique known as the Scalar …
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A surface flow visualization study of boundary layer behavior on the blades of a solid-wall compressor cascade at high angles of attack
The oil-film surface flow visualization technique was applied to circular arc compressor blades in a solid wall, high aspect ratio cascade for the purpose of describing the transition from corner stall to full blade stall, and the blade surface flow under fully stalled conditions. Photos of the …
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Experimental investigation of the impact of the permeable layer thickness on the surface flow above and the threshold for incipient motion of submerged objects
Previous work regarding flows over a permeable bed has confirmed that the flow characteristics deviate from those observed in impermeable rough boundary layers. However, the effect of the permeable bed thickness is not fully understood. Current models for threshold of incipient motion implicitly …
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Flow Imaging of the Fluid Mechanics of Multilayer Slide Coating. Flow visualisation of layers formation in a 3-layers slide coating die, measurement of their thicknesses and interfacial and free surface flow instabilities
… the physical properties of the coating fluids), flow instabilities may arise at the interfaces between the layers and on the top layer. These instabilities ruin the application of the final multi-layered coating and must be avoided. This research addresses this coating flow situation and seeks to …
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The development of passive flow control vortices
Surface flow visualisation and Particle Image Velocimetry (PIV) were used to investigate the flow-field of sub-boundary layer vane vortex generators (VVGs) and steady jet vortex generators (SJVGs) in a separated flow at 20m/s. The vortex generators were mounted on a 2D bump which was situated on …
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Radial spreading of vertical buoyant jets in shallow water
… have to be achieved in the radially spreading surface region of the jet. The degree of dilution obtained in the radial surface buoyant jet region will depend upon the buoyancy and velocity of the effluent, and the depth of water available. Prior to the installation of an outfall, the dilution …
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Wake deceleration of a racecar multielement airfoil in ground effect
… downforce as a result of the interaction between flows around adjacent elements, there may exist off-the-surface flow reversal, commonly known as wake bursting, causing an adverse effect on the downforce generated. Since the phenomenon of off-the-surface flow reversal occurs as a result of …
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Investigation of liquid fuel jet injection into a simulated subsonic "dump" combustor
… injection of liquid fuel into a two dimensional flowfield designed to represent a sudden-expansion "dump" combustor were performed under cold-flow conditions. Test conditions were as follows: 0.6 entrance Mach number, 25 PSIA total pressure, and nominally 75°F stagnation temperature. Two step …
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A comprehensive modeling approach for urban rainfall - runoff simulation
… a prevalent research topic worldwide, including surface flow, underground drainage flow and especially the inevitable flow connecting with underground infrastructures in highly urbanized areas. A comprehensive modeling approach and effective mitigation measures are necessary for urban risk …
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Experimental Characterization of Additively Manufactured Multi-Feather Wingtip Devices
… tip attachments were designed and manufactured. Surface flow visualization and force balance campaigns were then conducted at the ERAU Micaplex low speed wind tunnel. The surface streamlines from the oil surface flow visualization campaign showed that the basic winglet had flow over the wing that …
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