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 21 for “"Splashing."”.
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"I don't like splashing in the water": children's voices in primary science
This study considers children’s attitudes towards science and their ideas and understandings of science concepts. Attitudes and ideas and understandings were investigated with respect to several factors (age, gender, age and gender, science ability level, socioeconomic group, school and class …
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Asymmetric Behavior of a Drop Upon Impact onto a Surface
… a new model was developed to determine the splashing threshold of the drop impact onto a moving surface. The model is capable of describing the azimuthally different behavior of splashing. The effect of liquid viscosity on drop splashing was clarified. A comprehensive regime maps of drop …
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Splashing tradition: the use of tradition and church history in recent German baptismal theologies as seen in the views of Th. Schneider, W. Pannenberg, and A. Heinze
This thesis analyses the use of tradition and church history in the baptismal views of the recent German theologians Theodor Schneider (Roman Catholic, born 1930), Wolfhart Pannenberg (Lutheran, 1928-2014), and André Heinze (Baptist, 1961-2013). The differences in the practice and understanding of …
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Spray and Single Droplet Impingement on a Wall
… The effect of surface roughness on the splashing threshold is incorporated into the study and is found to play a major role in dictating the average sizes of secondary droplets. The second part of this thesis presents an analytical model of single droplet splashing on a slightly wetted …
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Experimental and theoretical study about drop impact on inclined surfaces and substrates with different roughness and wettability
… en otras más pequeñas (fenómeno denominado splashing). Así, tras una breve introducción de los fenómenos a analizar, el segundo capítulo de esta tesis se dedicará al estudio de la evolución temporal de la expansión de gotas de líquidos de baja viscosidad al impactar sobre superficies lisas e …
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Simulated Material Erosion from Plasma Facing Components in Tokomak Reactors
Material erosion, melting, splashing, bubbling, and ejection during disruption events in future large tokamak reactors are of serious concern to component longevity. The majority of the heat flux during disruptions will be incident on the divertor, which will be made from tungsten in the future …
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Spreading behavior of molten metal microdroplets
… of abnormal spreading behavior, such as splashing and bouncing, have yet to be satisfactorily addressed. An understanding of these mechanisms is essential to determine the optimal deposition conditions for the DBM process. This thesis investigates the fundamental, but poorly understood, …
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Microstructural analysis of thermal spray coatings by electron microscopy
… substrate during spraying significantly reduced splashing of the splats and promoted substrate melting. A high substrate surface roughness, induced by treatments such as grinding or grit blasting, strongly disrupted the spreading of the impacting particles, creating very irregularly-shaped splats …
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An experimental study of evaporative cooling from liquid droplets impinging on a hot surface
… surfaces. We found four regimes which were named splashing, fizzing, flat film, and marbling based on the dynamic properties of the drop impact. We found that the emergence of these regimes is primarily controlled by the Jacob number, a dimensionless group describing the ratio of sensible to …
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Drop deformation dynamics in extensional flows : influence of chemical-, mechanical- and photo-degradation.
… deviate from their intended targets due to splashing, drifting, and bouncing, posing significant challenges for efficient delivery. Various studies investigated how the rheological properties of the polymer influence the drop impact outcome (i.e., suppression of splashing and rebound). …
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Understanding the Formation Mechanism of Plasma-sprayed Ni and Ni20Cr Splats through Experimental and Numerical Study
… surface. For regularshaped splats (finger splashing or perfect disk), a numerical simulation was developed to investigate droplet spreading behaviour and the solidification process. The influence of the interfacial thermal contact resistance, the liquid-solid contact angle, the droplet …
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Fluidized-bed combustion of coal
… due to elutriation and the second as a result of splashing. However only qualitative conclusions have been drawn from the splashing phenomenon. The incieased ~plashing rates associated with the deeper beds may be attributed in ~art to the possible transition from a bubbling to~ slugging flow …
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Jet impingement boiling heat transfer at low coiling temperatures
… with minor effects from latent heat caused by splashing water. The maximum peak heat flux value increases with decreasing speed and occurs at a surface temperature of approximately 200 °C, regardless of speed. Below a surface temperature of 200 °C, speed has a negligible effect on peak heat …
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Fluid Agitation Studies for Drug Product Containers Using Computational Fluid Dynamics
… made to see the effects of bubble formation or splashing during spin-down to rest.</p> <p>The numerical and experimental results showed favorable comparison when measuring the meniscus height or the surface profile between the air and liquid. Also, at high angular velocity and dynamic viscosity, …
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Characterization, utilization and treatment of mechanized clam processing wastes
… processing plants from washing operations, from splashing and overflow of tanks and flumes and from cleanup operations. Wastewater generation varied from plant to plant and at each plant over time, ranging from 80,000 gallons to almost 350,000 gallons per day and as high as 40,000 gallons per …
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Development and Validation of Fluid-Structure Interaction in Aircraft Crashworthiness Studies
… valid, as the difficult to model phenomena of splashing was captured and the maximum impact force was within five percent of analytical calculations for the 20° and 30° deadrise wedge. Physical small scale aircraft ditching experiments were then performed with an innovative testing platform …
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Towards realistic interactive sand : a GPU-based framework
… model shows highly dynamic phenomena, such as splashing and avalanching, as well as static dune formation. Moreover, by utilising standard metrics taken from granular material science, we show that the simulated sand behaves in accordance with previous numerical and experimental research. We …
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Droplets, splashes and sprays: highly detailed liquids in visual effects production.
… as OpenVDB. It is shown that the toolkit for splashing liquids, even at fine-scales, can be improved by incorporating greater physical motivation further demonstrating the importance of physical simulation in visual effects and suggesting effects similarly reliant on artistic input (e.g. …
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The reconstruction of fires involving highly flammable hydrocarbon liquids
… are also predictable losses due to pouring and splashing of volatile fuels that are closely related to the vapour pressure of the liquid involved. Vertical diffusion of n-pentane and hexane vapours is very slow when the vapours are being generated by evaporation from a pool. The heat lost to …
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Effect of oxygen availability on the corrosion rate of reinforced concrete in marine exposure zones: inference from site and lab studies
… cyclic wetting and drying, and periodic splashing. In order to simulate the submerged environment, the cover surface of the specimens were permanently saturated with a 5% NaCl solution while for the splash zone concrete specimens were sprayed with 5% NaCl solution every second day. The …
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