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 14 of 14 for “"Droplet deposition"”.
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Droplet deposition on hydrophobic surfaces for agricultural sprays
… in-situ precipitation of polyelectrolytes during droplet impacts and its applications in enhancing the retention efficiency of sprays. Large amounts of agricultural sprays are wasted worldwide, due to the poor retention on hydrophobic plants. As the harmful effects of pesticides in particular are …
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Effects of surface properties on solder bump formation by direct droplet deposition
Recent advances in microdroplet generation and deposition processes have made it possible to directly form solder bumps on integrated circuits using micron-sized molten metal droplets. The direct droplet deposition bumping process can potentially produce uniform-sized bumps more economically than …
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High precision electrohydrodynamic printing of polymer onto microcantilever sensors
… printing to deposit 2 – 27 um diameter polymer droplets onto microcantilever sensors. The polymer droplets were deposited as single droplets or organized patterns, with sub-μm control over droplet diameter and position. The droplet size could be controlled through a pulse-modulated source …
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Advancement of closure relations for annular flow modeling in CFD
… The development of closure relations for droplet deposition and entrainment as well as wave-induced interfacial shear, is a major priority for the modeling of annular flow in M-CFD. In annular flow conditions, liquid is continuously exchanged at the interface between the bulk steam and the …
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A System for High-Throughput Materials Exploration Driven by Machine Learning
… conventional methods. First, a novel inkjet droplet deposition hardware system is constructed to generate arrays of unique functional material compositions in the form of droplets using fluid mechanics and motor control theory. Second, computer vision and Bayesian optimization machine …
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Raman and Surface-Enhanced Raman Spectroscopy Imaging of Droplets: Characterization and Environmental Implications
Droplets are ubiquitous microscopic systems - ranging in size from several nanometers to ~100 micrometers – that undergo abundant environmental interactions. Researchers have shown that droplets can impact both earth climate and air quality through physical and chemical processes. Droplets released …
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Aircraft Anti-Icing Analysis: Water Droplet Dynamics Under High-Frequency Atomization and Superhydrophobic Effects
… the weight. Still, complexities arise from water droplets freezing at supercooled levels. A novel approach uses the structure's vibration to induce atomization, a proposed active anti-icing method using high-frequency Piezoelectric Transducer (PZT) vibration and combines it with the passive method …
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Modeling of Material Jetting Additive Manufacturing with Applications to Paper Machine Fabrics
… feature outcome. Next, high-fidelity multiphase droplet models are developed to explore how deposition dynamics affect feature formation. What makes this work novel is the exploration of deposition on non-uniform surfaces near a layer edge. Results showed that local deposition dynamics will …
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Sulfur coating of urea in shallow spouted beds
… and momentum balance equations, inertial sulfur droplet deposition as the dominant coating mechanism, and Monte Carlo simulations. The hydrodynamic model was based on the one-dimensional mass and momentum balances suggested by Lefroy and Davidson (1969) for gas and particle motion in the spout, …
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Effect of phytosterol enrichment on the crystallisation, physiochemical, and interfacial behaviour of bulk and emulsified milk fat triacylglycerol matrices
… found to be able to decrease the average size of droplets in an emulsion and participate in a synergistic interaction with whey protein at the emulsion interface. In addition, phytosterol enrichment was found to have no negative effect on the creaming behaviour of the emulsions. Phytosterol …
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Experimental investigation of mist flow generated by reed valves in compressor discharge
… valve. The mist flow characteristics such as droplet size, drop velocity are determined by obtaining high speed videos of the flow in a compressor equipped with optical access and performing image processing in those videos to quantify the variables of interest. The evolution of this study …
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Design of bio-inspired texturing treatments, via high power ultra-short pulse lasers, of ferritic stainless steel surfaces that inhibit the formation of bacterial biofouling on tools for hospital use and in the food industry
… over time, with their contact angle (upon water droplet deposition) stabilizing after approximately two weeks, shifting from hydrophilic to hydrophobic behavior. This evolution is attributed to the adsorption of volatile organic compounds in the first few days after laser texturing, as confirmed …
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Comprehensive throughflow method for steam turbine development
… and optical measurements show a much broader droplet spectrum than in nozzles and steady cascade expansions. The dominant theory explaining this behaviour is that large-scale fluctuations in static temperature (comparable to temperature drop in a turbine stage) are caused by unsteady blade …