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 20 of 133 for “"Grooves"”.
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Numerical Simulation of Shock Wave Propagation in Ducts with Grooves
… roughness. The roughness is added in the form of grooves as in an existing experiment. Different shapes are considered in order to better understand the physics behind the evolution of the complex shock patterns resulting from diffraction, reflection and refraction of the primary moving shock. The …
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In the Grooves: Record Stores as Community Spaces in Central Texas
No abstract prepared.
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A ray tracing investigation of light trapping due to grooves in solar cells
The biggest problem the world faces today is finding a renewable energy source as fossil fuel reserves being depleted, and the ongoing burning of fossil fuels is destroying environments all over the world. Solar energy is the most abundant energy source but is too expensive compete with …
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Unpopular Meters: Irregular Grooves and Drumbeats in the Songs of Tori Amos, Radiohead, and Tool
… conventions in the most common irregular grooves; explore connections between drumbeat, meter, hypermeter, and form; and present numerous examples of unique or idiosyncratic drumming practices. While explaining metric trends broadly within a historically situated genre, my research also …
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Experimental study of applying grooves on semi-tubular blank sheet metal using incremental sheet forming.
… strained material, and applying multiple grooves. The toolpath strategies employed different configurations of the groove forming order, tool utilization and number of passes. Forming successive grooves distorted the previously made grooves. It was shown that the order of forming grooves …
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A coupled model for ring dynamics, gas flow, and oil flow through the ring grooves in IC engines
Oil flows through ring/groove interface play a critical role in oil transport among different regions the piston ring pack of internal combustion engines. This thesis work is intended to improve the understanding and modeling capability on this important oil transport mechanism for better analysis …
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Flows in Grooved Channels
… the analysis of effects of two-dimensional grooves on flow responses in laminar channel flows. Straight grooves have been considered which may have an arbitrary cross-section and an arbitrary orientation with respect to the flow direction. It has been shown that the grooves effects can be …
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The comparison of tensile strength of polycarboxylate cement among different surfaces of implant custom abutments
… smooth surface (Ts), titanium with retentive grooves (Tr), titanium smooth surface with titanium nitride coating (Gs), titanium with retentive grooves and titanium nitride coating (Gr), and zirconia (Z). A total of 25 lithium disilicate crowns were fabricated and randomly paired with a test …
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Tri-helical direct gravure coating
… to be influenced by the depth of the tri-helical grooves and the capillary number. Experiments show that as the web-to-roll speed ratio is increased, so too is fluid pickout from the grooves, although the coated film thickness may decrease. A key feature of the present investigation is the …
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Using Anisotropic Micro-Scale Topography to Manipulate the Wettability of Aluminum and Reduce the Retention of Water
… compared to droplets on a surface without micro-grooves. No chemical surface treatment is necessary to achieve this water repellency; it is accomplished solely through the anisotropic surface topography. The droplet geometry shows an elongated base contour relative to a surface without …
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Effect of Calcium Phosphate Ceramic Architectural Features on the Self-Assembly of Microvessels In Vitro
… consisting of semi-circular ridges and grooves were produced. Grooves and ridges were designed to have widths of 330 μm and 660 μm, with periodicities, respectively, of 1240 μm and 630 μm. Groove depth was varied between 150 μm and 585 μm. Co-cultures of endothelial cells and osteoblasts …
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Nanopatterned anchoring layers for liquid crystals
… This thesis describes the use of nano-grooves patterned with electron beam lithography as a novel way to provide varied anchoring energies for Liquid Crystal devices. A Liquid Crystal beam deflector is discussed and designed with computational simulations as a possible application for …
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Augmentation of Jet Impingement Heat Transfer on a Grooved Surface Under Wet and Dry Conditions
… resulted from decreasing the size of the grooves from 3.56mm to 2.54mm. Similarly, no noticeable change in heat transfer resulted from changing the relative position of the jets striking the surface at the top of the grooves to the bottom of the grooves. Deeper grooves with twice the depth …
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Templated dewetting of thin solid films
… thick films dewetted out of the pits and grooves prior to breaking up into particles while thinner films pinched off to form particles in the pits and grooves. If the pits or grooves were far apart, the pinch off also resulted in particles forming on the mesas between the pits. If the pits …
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A study of the functional anatomy of the bovine cervix with special reference to the epithelium, mucus secretion and sperm transport
… the cervix, with numerous tertiary shallow ’grooves’ apparent on all epithelial surfaces. No evidence was found suggesting blind-ending glands or crypts. Staining results in follicular animals indicated a predominance of neutral and sulfated mucins in apical areas with secreted mucins …
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Effect of radial transport on compressor tip clearance flow structures and enhancement of stable flow range
… the compressor flow range. Circumferential grooves improve the flow range in the manner described above. In the presence of such a groove the radial velocity profile along the passage can be altered so that that the radial transport of streamwise momentum is decreased. The flow fields …
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An Investigation of Dolphin-Groove Inspired Surface Patterning on Flow Control
… mechanism that could result from the micro-grooves found on dolphin skin (Tursiops truncates). A water tunnel was used to study a turbulent boundary layer over rigid 3D printed plastic models, and an adverse pressure gradient was created with a rotating cylinder to induce flow separation in …
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CFD in support of development and optimization of the MIT LEU fuel element design
… been performed to analyze the effect of the fuel grooves on the local heat transfer coefficient. The quasi-DNS results bring useful insights, showing two main effects related to the existence of the grooves. First, the increased surface leads to an increase in the pressure drop and further, the …
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Geometry mediated drag reduction using riblets and wrinkled surface textures
… are viscous retardation of the flow in the grooves (both laminar and turbulent) and the displacement of vortical structures away from the wall in turbulent flows. Due to their effectiveness in altering the boundary layer structure and reducing the viscous drag force, use of riblets have been …
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Evaluation of implant restoration retention on various custom abutment materials and surfaces
… smooth surface (Ts), titanium with retentive grooves (Tr), titanium with a nitride coating and smooth surface (Gs), titanium with a nitride coating and retentive grooves (Gr), and zirconia (Z). A total of 25 lithium disilicate crowns were fabricated and each crown was cemented to its …
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