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.
Results
Showing 1 to 11 of 11 for “"Grooved Surface"”.
-
Augmentation of Jet Impingement Heat Transfer on a Grooved Surface Under Wet and Dry Conditions
… cooling experiments were performed on flat and grooved surfaces with the surface at a constant temperature. For the flat surface, power and temperature measurements were performed to obtain convection coefficients under a wide range of operating conditions such as jet speed, orifice to surface …
-
Increasing the Heat Transfer on a Grooved Surface Under Dry and Wet Conditions by Using of Jet Impingement
… using air jets which impinge on a triangular grooved surface with dry grooves and grooves containing water. One major application is for condensers of thermoelectric power plants. The heat and mass transfer analogy were successfully used to evaluate the simultaneous heat and mass transfer. …
-
Using Anisotropic Micro-Scale Topography to Manipulate the Wettability of Aluminum and Reduce the Retention of Water
Water droplets placed on a micro-grooved aluminum surface using a micro-syringe exhibit significantly increased apparent contact angles, and for water condensed onto an inclined, micro-grooved surface, the droplet volume at incipient sliding is reduced by more than 50% compared to droplets on a …
-
Solar energy collection using vee-grooved surfaces
… of diffusely and specularly reflecting V-grooved surfaces. Concepts are developed for the so-called "apparent" absorptance of a V-groove cavity, as well as for the "effective" absorptance of a V-grooved surface. These concepts are formulated in closed form mathematical equations, which …
-
An investigation into the effect of longitudinal micro-striations and their profiles, on the drag of flat plates
… of specific dimensions are machined onto the surface of a smooth plate, in a streamwise direction. The effect of these surface modifications on the drag force of a smooth plate is examined. The use of surface modifications as a means of reducing viscous drag on a body has potential aerodynamic …
-
Solvent filtration through the use of monolayer-protected gold nanoparticles
… have been reported to form an interesting grooved surface morphology, and it has been shown that their solubility varies according to the ability for individual solvent molecules to penetrate these grooves. Here, a system of filtration was designed, aimed at using these nanoparticles to …
-
Directed collisions between epithelial cells and fibroblasts in vitro on micromachined substrata
… on whether different implant materials or surface topographies alter cell interactions. In this study F and E cells were cultured separately or in combination on smooth or grooved titanium surfaces. Grooves 40 μm wide and 3 μm deep, separated by ridges 40 μm wide were placed in silicon by …
-
An Investigation of Dolphin-Groove Inspired Surface Patterning on Flow Control
… layer and compared to the smooth plate (non-grooved) wall cases. The grooved surfaces form embedded vortices within the sinusoidal cavities which can lead to a partial slip condition effect in the wall vicinity. DPIV results quantify momentum adjacent to the grooved surface and the …
-
Design, fabrication and testing of a lateral self-cleaning MEMS switch
… by the self-alignment of the contact surfaces, self-cleaning of the particles generated from asperity fracture and deformation, and the anchoring method of the metal contacts in the micro switch structures and the large stroke piezo-actuation by the strain amplifying MEMS mechanism. …
-
Identifying droplet boundaries: impacts of surface topography on droplet freezing and an investigation of the impacts of surfactant on sprayed droplet dynamics
… 1) condensing droplets subsequently freezing on surfaces, and 2) droplet spray dynamics from irrigation nozzles. Freezing of droplets can cause a wide variety of problems, including frosting on windshields; icing on wind turbines and airplanes; and freezing of heat pipes, thereby reducing their …
-
Design and development of thin optical components for nonimaging applications = Diseño y desarrollo de componentes ópticos delgados para aplicaciones anidólicas
… that emits light uniformly across its exit surface toward the LCD screen. In this thesis, the backlight is designed using the flow line design method. The light coming from LEDs enters the backlight by one of its side being confined within it first, and then extracted toward the LCD by a …