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Showing 1 to 14 of 14 for “"Jet breakup"”.
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Experimental Investigation of Jet Breakup at Low Weber Number
… on the disintegration of circular liquid jets, ejected into a stagnant ambient atmosphere at low Weber number, is presented in this thesis. The process of breakup of the liquid jet was captured using a real-time image processing high-speed digital camera system. In order to understand the …
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Numerical Simulation of Corium Jet Fragmentation
… molten corium may fall in the form of a jet into a water pool. The fragmentation of the corium jet is a critical process concerning Fuel-Coolant Interactions (FCI). A steam explosion could occur depending on jet fragmentation and dispersion in the water. A 2-D in-house CFD MATLAB script …
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Digital holography for exploring instabilities and breakup of liquid jets in supersonic crossflows
Direct injection studies of liquid jets in supersonic crossflows (JICFs) are critical for understanding combustion in scramjet engines. Exploring these fluid dynamic interactions is not only an important step towards characterizing fundamental liquid breakup properties but also key for improving …
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Nanoparticle formation and coating using supercritical fluids
Jet breakup phenomenon and nanoparticle formation The focus of this dissertation is to study the SAS process to manufacture nanoparticles with minimum agglomeration, controlled size and size distribution. Solution jet breakup and solvent evaporation into supercritical fluid (SC CO_2) is studied …
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Agricultural Spray Dynamics for Automated Pollination of Kiwifruit
… spray nozzle utilizing a novel form of liquid jet perturbation was built and tested. The presented approach resulted in diverse, hitherto unobserved, jet breakup regimes. The system is a new avenue for fundamental uids research in addition to being a useful approach for real-time precision …
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Studies on the ion-droplet mixed regime in colloid thrusters
… fraction of the ion current is emitted from the jet breakup region with considerably lower energies. This energy variety transforms the optical hardware elements into energy filters by taking advantage of the chromatic aberration property of electrostatic lenses. The relatively wide ion energy …
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Plasma Torch Atomizer-Igniter for Supersonic Combustion of Liquid Hydrocarbon Fuels
… atomizing, and igniting the liquid fuel. Jet breakup length was measured and characterized, and mean droplet size was estimated using an existing correlation. Several qualitative observations regarding quiescent combustion were made, including torch power effects and the process of flame …
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Spatio-temporal Characteristics of a Spray from a Liquid Jet in Crossflow
A liquid jet in a crossflow is often used to as a fuel injection method for combustion systems. Parameters such as penetration and core trajectory are used as characterization for the spray and specification of design criteria for combustor geometry. In addition to penetration and core trajectory, …
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Simulations of interfacial dynamics of complex fluids using diffuse interface method with adaptive meshing
… devices have reproduced scenarios of jet breakup and drop formation observed in experiments. Parametric studies have shown dripping and jetting regimes for increasing flow rates, and elucidated the effects of flow and rheological parameters on the drop formation process and the final …
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Hydrodynamics of impinging liquid jets used in cleaning
Impinging liquid jets are widely used in industrial cleaning-in-place (CIP) systems to remove residual product or soil layers from the internal surfaces of process equipment such as tanks and vessels. The optimisation of these cleaning operations is often done empirically as a large number of …
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Response of Electrified Micro-Jets to Electrohydrodynamic Perturbations
The breakup of liquid jets is ubiquitous with rich underpinning physics and widespread applications. The natural breakup of liquid jets originates from small ambient perturbations, which can grow exponentially until the amplitude as large as the jet radius is reached. For unelectrified inviscid …
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Nonlinear evolution of annular layers and liquid threads in electric fields
… dynamics of viscous perfectly conducting liquid jets or threads under the action of a radial electric field are studied theoretically and numerically here. The field is generated by a potential difference between the jet surface and a concentrically placed electrode of given radius. A long-wave …
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A novel method of producing microbubbles for targeted drug delivery.
Microbubbles, currently employed in diagnostic ultrasound as a contrast agent, have a potential new application as vehicles for targeted drug delivery, which could revolutionise medicine by eliminating side-effects. A new device is developed which outperforms all existing devices in terms of …
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A Study of Liquid Jet Penetration of Liquids with Interfacial Boiling of the Continuous Phase
Made available in DSpace on 2017-07-06T18:56:13Z (GMT). No. of bitstreams: 3 Schneider_Jeffrey_P_MS.pdf: 52990407 bytes, checksum: 325aba8ed028959437bd090d9d303fb9 (MD5) Schneider_Jeffrey_P_MS_ABS.pdf: 728875 bytes, checksum: 434bca97805fea99d98201d108b69eb4 (MD5) license.txt: 4813 bytes, checksum: …