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 20 of 59 for “"Water-oil"”.
-
Interfacial self-assemblies of surfactants at water-oil interfaces
… of a surfactant (ionic or non-ionic) and a polar oil (such as oleic acid). First, self-assembly of different types of surfactants (ionic vs. non-ionic) at immiscible water-oil interface is used for the newly emerged liquid-in-liquid 3D printing. In this printing approach, the aqueous solution of …
-
A universal approach to stabilize water-oil interface via surfactant self-assembly
… diagram for the same material system (involving water, surfactant, and polar oil) that was used in liquid-in-liquid 3D printing is established to study the equilibrium phase behavior. The ternary phase diagram obtained from the simulations agrees with the experimental results, specifically in …
-
Optimizing oil production in horizontal wells (water/oil cresting in horizontal wells)
… Cresting poses problems such as uneconomic oil production rates due to increasing volumes of effluent(s) (unwanted water and or gas) produced with oil over time as well as the overall recovery efficiency of oil reservoirs. Production optimization from crest-affected thick- and thin-oil rim …
-
Visualization of water/oil displacement in porous media in the presence of chemical reaction.
In enhanced oil recovery, low interfacial tension, optimum wettability condition, high pH value, and the electric charge density at the interface can improve the oil recovery percentage appreciably. However, the addition of sodium hydroxide changes the interfacial tension to an ultra-low value. …
-
Experimental investigation of the complex liquid liquid equilibrium in the system pure/technical grade nonionic surfactant + water + oil
Aufgrund verschiedenster Anwendungsmöglichkeiten sind tensidhaltige Systeme immer mehr Gegenstand universitärer aber auch industrieller Forschung. Das Phasenverhalten von Systemen des Typs nichtionisches Tensid + Wasser + Alkan ist in der Literatur sehr gut beschrieben. Ein wichtiges Merkmal dieser …
-
Experimental and Simulation Study of Relative Permeabilities in Heavy Oil/Water/Gas Systems
… behaviour of a typical Canadian bitumen, water and gas. Series of isothermal core flood experiments were conducted on an unconsolidated core composed of cleaned Athabasca sand matrix and relative permeabilities of the involved phases were determined. Athabasca bitumen was used as the oil …
-
Coalescence mechanisms of dispersions in glass fibre beds
… droplets in the range of 1-100 µm with both oil/water and water/oil dispersions. This packing proved to be 100% efficient for superficial velocities substantially higher than critical velocities for other packings. Four different oil/water and water/oil dispersion systems were studied …
-
Fluid content effect on acoustic impedance and limits of direct detection capability : illustrated on an offshore prospect
The presence of gas and oil in some sand formations decreases the seismic velocity and density to such an extent that anomalously large reflections coefficients are encountered at fluid contacts. Geerstma and Gassmann's theories are equivalent and provide a good way to study the physical properties …
-
A development of regression models for predicting two-phase relative permeability in consolidated rock
… the development of prediction equations for the water-oil imbibition relative permeability and gas-oil drainage relative permeability from experimental data.</p> <p> Laboratory relative permeability data along with the corresponding rock and fluid properties were collected, and stepwise linear …
-
Motion of Janus and Patchy Particles Near Various Boundaries
… various fields such as emulsion stabilization, oil recovery, drug delivery, biosensors and environmental remediation. A majority of the envisioned applications require Janus and patchy particles to operate near boundaries, i.e., a wall or a fluid/liquid interface, which significantly affect the …
-
Seafloor Sediment Bacterial Community Profiling for Baselines and Environmental Effects Monitoring at a Deep-Sea Oil Production Site Offshore Nova Scotia, Canada
… responders in a marine pollution event, hence oil-degrading bacteria can be used to monitor dispersion and biodegradation of oil spills. Deep-water subsurface oil reservoirs are predicted to exist along the Scotian Slope offshore Nova Scotia. Seafloor sediment from 19 Scotian Slope stations …
-
Developing a novel mechanistic model for four-phase oil-water-gas-sand stratified flow in a horizontal pipe.
… model for the stratified four-phase (gas-oil-water-sand) flow in a horizontal pipe. This model takes into account some aspects of the existing multi-layer liquid-liquid and liquid-solid models. The entire stratified flow structure comprising of the stationary sand bed, moving sand bed, …
-
Effects of Flow Rate and Droplet Size on Double Emulsion Morphology
… morphology of three fluids, an air bubble and oil droplet in water. The experimental results have been compared to a morphology diagram based on the spreading factors that depend on the interfacial tension between two fluids. The possible morphologies are complete engulfment, partial …
-
Surface and Subsurface Application of Chemical Dispersants and Associated Ecosystem Impacts
<p>Chemical dispersants are applied to spilled oil in marine environments when other, less controversial, methods are not adequate for the incident. They are considered to be a response method as opposed to a direct cleanup method, with the intended goals of reducing risk of exposure to sensitive …
-
The effects of per- and polyfluoroalkyl substances (PFAS) and high fat diet on metabolism, reproductive health & prostate cancer progression
… industries and settings. Their resistance to water, oil, grease, and extreme temperatures enabled utilization of PFAS in adhesives, cleaning-products, paints, coatings, packaging, building materials, and firefighting foams. Due to highly fluorinated carbon chains ranging in length, PFAS are …
-
Improving Adhesion of Seasonings to Crackers with Hydrocolloid Solutions
… applied on crackers that had been coated using water, oil, emulsion, sucrose, or hydrocolloid solutions. The hydrocolloids that were used include gellan gum, kappa-carrageenan, methyl cellulose, gum karaya, gum tragacanth, gum arabic, guar gum, modified starch, and maltodextrin. Solutions of …
-
Automobile friction materials: a test instrument and technique for determining dynamic mechanical properties in relation to brake squeal
… was also performed to establish the effect of water, oil and brake fluid and also to determine the effect of the various components of friction materials.
-
Calculation of the effective atomic number for the iodine contrast agent of the varying concentrations
… The resultant effective atomic numbers for the water, oil, and iohexol-water solutions of varying concentrations are presented in the study. The effects of the k-edge on both the linear attenuation curve and the effective atomic number curve are discussed. The possible future venues of the …
-
Using High-level Synthesis to Predict and Preempt Attacks on Industrial Control Systems
… physical processes in industries such as power, water, oil and manufacturing. In contrast to the personal computing space, where attackers attempt to capture information or computing resources, the attacks directed at ICSes aim to degrade or destroy the physical processes or plants maintained by …
Page 1 of 3