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 66 for “"Inclination Angle"”.
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Design and manufacturing of PDMS micro structures with dynamic inclination angle
… on flexible carrier films with inclined angle-tunable microstructures. An example of hierarchical geometry is proposed and fabricated using a double-molding technique. Finite Element Analysis shows that the nanostructure angle can be tuned from –45 to +40 degrees while the space among …
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Visualization and measurement of filmwise and dropwise air gap membrane distillation at varied module inclination angle and gap spacer Orientation
… performed by varying inlet temperature, module inclination angle, and gap spacer to identify the effect on the permeate production rate of the system. While AGMD is potentially one of the most efficient types of membrane distillation, experimenting with the tilt angle of the module so as to …
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On quantum vortex reconnections
… a straight vortex line, where the vortex ring inclination angle is varied. We analyze the evolution throughout the dynamics of the total length and curvature of the vortex filaments for different values of the inclination angle, as well as the redistribution of total energy among its components …
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Characterization of inclined oscillating jets and crossflow interaction for use in active flow control
… and delay the onset of flow separation at high angles of attack. Understanding the effects of blowing ratios and inclination angles on mixing characteristics and turbulent interactions in the flow can shed light on the effectiveness of such fluidic oscillators for active flow control purposes. …
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Heat transfer and visualization in large flattened-tube condensers with variable inclination
… flux of steam of 7.5 kg/m2-s over a range of inclination angles. The angle of inclination of the condenser tube was varied from 0.3o (horizontal) to 13.2o downward flow. The experiments were performed with uniform crossflowing air with velocity of 2 m/s. Both dropwise and filmwise condensation …
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Effect of inclination on pressure drop and flow regimes in large flattened-tube steam condensers
This thesis presents an experimental study of the inclination effect on pressure drop and flow regime during condensation of steam in a large flattened tube used in air-cooled condensers (ACC) for power plants. Steam with mass flux of about 7 kg m-2 s-1 was condensed inside a 10.7 m long, flattened …
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Combined bottom-hole pressure calculation procedure using multiphase correlations and artificial neural network models, A
… flow regime classification. In order to include inclination angle effects on flow regime transition, the model uses inclination angle and as well as gas and liquid velocity numbers as input variables. Four possible different flow patterns were considered for upward and horizontal multiphase flow, …
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Bioturbation in Supratidal Carbonates: Georadar Characterization of the Patterns and Structure of Decapod Burrows
… (0.9-1.9/m vs. 0.01-0.06/m) and 2) shallower inclination angle (21-46° vs. >60°). C. guanhumi burrows are differentiated by: 1) larger diameter; 2) presence of an end chamber (where the radar signal is not attenuated by saline groundwater); 3) low electromagnetic signal velocity (~9 cm/ns vs. …
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Evolution of 3-d magnetic topology in flare-productive active regions
… focuses on the magnetic properties (magnetic inclination angle, transverse magnetic field, Lorentz force, etc.) and their evolution associated with flares. The observation is also compared with numerical MHD simulations and theoretical models. The main findings in this dissertation are briefly …
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Influencing contact-line behavior in dynamic wetting through thermocapillarity and surface topography
… topographical defect. Above a critical inclination angle, the gravitational force acting on the droplet exceeds the surface-tension force, causing the droplet to depin and slide freely. The influence of key geometric features of the defect on the critical inclination angle is …
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Laboratory Debris Flow Experiments: A Study of Erosion
… supply and erodible bed material and the flume inclination angle, ϕ. Then, we demonstrate that there is a unique neutral angle, ϕN (the angle at which erosion is equal to zero), for each bed and supply composition combination. We show that for each system, total net erosion increases roughly …
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Experimental and Numerical Study of Endwall Film Cooling
… using cylindrical holes with a streamwise inclination angle of 35? and no compound angle relative to the mean approach velocity vector. The passing wakes increased the heat transfer coefficients at both the wake passing frequencies that were experimented. Due to the increasing film cooling …
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Benchmarking of Computational Models Against Experimental Data for Adiabatic Film-Cooling Effectiveness for Large Spacing Compound Angle Full Coverage Film Cooling Arrays
… tested the effects of blowing ratio, surface angle, and hole spacing for two full coverage geometries composed of cylindrical staggered holes at a compound angle of 45 degrees. These holes varied parametrically the inclination angle to be 30 and 45 degrees, while maintaining a lateral and …
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Statistical Shape Modeling to Quantify Variation in the Proximal Humeral Anatomy
… between posterior offset and the head inclination angle. These are differences that should be considered when designing implants for a global population or subpopulation.</p>
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Numerical and experimental investigation of membrane distillation flux and energy efficiency
… is also used to study the effect of module inclination angle on Air Gap MD flux performance and these results compared with theoretical predictions to determine the optimal orientation of the AGMD apparatus.
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Crack coalescence in granite
… the effect of ligament length (L), flaw inclination angle (p3), and bridging angle (a) on coalescence is investigated. The same crack types as in other materials are observed. Coalescence patterns observed fit into a previously developed framework (for molded gypsum and Carrara marble) …
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Development of an optimised integrated underbalanced drilling strategy for cuttings transport in gas-liquid flow through wellbore annuli.
… fluid rheology, inner pipe rotation, pipe inclination angle, pipe eccentricity and solid particle size and density) and to investigate their influence and interaction on the fluid flow dynamics and solids transport mechanisms in horizontal and inclined annuli. Experimental results revealed …
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Numerical study of the thermal performance of solar chimneys for ventilation in buildings
… modelling of the solar chimneys. The effects of inclination angle, air gap, chimney height and view factor on the thermal performance of solar chimneys were explored in this study.
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The effect of inclusions in brittle material
… an inclusion pair, the effect of the inclusion inclination angle on coalescence is also investigated. Some observations reported in this study compare well with those of other researchers, while other observations are quite different. In general, the overall cracking sequences are similar to …
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Fluids Viscosity Effect on Non-Isothermal Buoyancy-Driven Exchange Flow in Inclined Pipes
… experimentally for different Atwood numbers, inclination angles and fluid pairs. The density difference drives the flow, that is achieved through added salinity for isothermal case and temperature difference for the non-isothermal case. Detailed benchmarking experiments were run for isothermal …
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