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 342 for “"Condensate."”.
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Mercury species in natural gas condensate
… levels of mercury in industrial gas and condensate streams is a cause of both environmental and production concern. The toxic nature of the element, in all forms, together with its ability to shut-down large processing plants dictates a need for its accurate and precise measurement. The …
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Tunneling Dynamics of a Bose-Einstein Condensate
… possibility to study the decay of quasi-bound condensates via tunneling. We develop a novel trapping configuration for this purpose, in which the barrier acts as one of the walls of the trap. Inter-atomic interactions strongly dictate the escape dynamics of the condensate out of this trap, …
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A tunable Bose-Einstein condensate for quantum interferometry
The subject of this thesis is the use of BECs for atom interferometry. The standard way atom interferometry is today performed is by interrogating free falling samples of atoms. The employed samples are cold (but not condensed) to have high coherence, and dilute, not to interact significantly with …
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Creation of an all-optical Bose-Einstein condensate
… of a large all-optically cooled Bose-Einstein condensate as a proof of the temperatures and densities achieved. In most cold atoms experiments, the Bose-Einstein condensate is achieved by evaporating the atoms in a magnetic trap.;Due to the swallowness of magnetic traps, the evaporation …
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Gas-condensate flow modelling for shale gas reservoirs.
… landscape of the oil and gas global market. Gas-condensate reservoirs represent an important part of these resources. The key feature of these reservoirs is the condensate banking which reduces significantly the well deliverability when the condensate forms in the reservoir below the dew point …
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Steam and Condensate System Control in Paper Making
The function of a paper machine is to form the paper sheet and remove the water from the sheet. A modern paper machine is divided into three main parts, the wire section, the press section, and the dryer section. Although the dryer section is only responsible for removing less than 1% of the water …
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Progress Towards a Spinor Bose-Einstein Condensate Machine
… with the discovery of the first Bose-Einstein condensates (BECs) in 1995. These ultracold atomic vapors allow for study of fundamental quantum electromagnetic properties of atoms that are otherwise inaccessible due to large thermal energy fluctuations disrupting the quantum state. To this end, …
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Exploring Matter-wave Dynamics with a Bose-Einstein Condensate
Bose-Einstein condensates of dilute gases provide a rich and versatile platform to study both single-particle and many-body quantum phenomena. This thesis describes several experiments using a Bose-Einstein condensate of Rb-87 as a model system to study novel matter-wave effects that traditionally …
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Air-side condensate management: Drainage channels in heat exchangers
Condensate on the air-side surface of flat-tube air-cooling heat exchangers can result in several adverse effects on the overall thermal-hydraulic performance. In order to improve the performance of compact heat exchangers under wet-surface conditions, promoting the drainage of condensed water is …
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A Trapped Single Ion Inside a Bose-Einstein Condensate
… a single trapped Yb+ ion in a Bose-Einstein condensate of Rb atoms. Our hybrid setup consists of a linear RF-Paul trap which is overlapped with a magnetic trap and an optical dipole trap for the neutral atoms. A first synergetic effect is the sympathetic cooling of the trapped ions to very …
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Atoms and Molecules Immersed in a Bose-Einstein Condensate
… ⁴⁰K impurities immersed in a ²³Na Bose-Einstein condensate. In contrast to Feshbach molecules, Bose polarons at negative scattering length are long-lived in the presence of the BEC. We demonstrate direct photoassociation from Bose polarons to electron- ically excited molecular states, dark …
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Management strategy of landfill leachate and landfill gas condensate
… study was conducted for landfill gas (LFG) condensate. In a laboratory study, leachate samples were fractionated into humic acids (HA), fulvic acids (FA) and Hydrophilic (Hpi) fractions, the specific UV254 absorbance (SUVA254) of the three fractions follows: HA > FA > Hpi. However, the …
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Controlling Factors on Condensate Production from the Eagle Ford Shale
… examines the impact on recovery from shale condensate reservoirs of key properties such as porosity and permeability as well as other controlling factors that include the horizontal wells length, liquid drop out and liquid loading around the wellbore. It also addresses the possibility of …
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Stability of a condensate film flowing down a vertical plane
… the motion and temperature in a two dimensional condensate film are formulated. The linearized stability problem is derived under the parallel flow assumption. A second—order perturbation solution of the stability problem is presented using the Nusselt solution as base flow. The boundary layer …
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The Interaction Between the Substrate and Frost Layer Through Condensate Distribution
… on a clean glass substrate is found to be as condensate rather than as for a substrate temperatures above -33°C and an absolute humidity above 0.15 g/kg. The inception of ""condensation frosting"" is further examined microscopically as a function of environmental parameters and substrate …
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Modeling Condensate Drops Retained on the Air-Side of Heat Exchangers
… angle results are used to develop a new model of condensate retention. The new model is successful in predicting the mass of condensate retained on coils tested by several other researchers. Preliminary analysis and experiments are presented as a step towards future extensions of the model.
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Characterization of the exhaust gas condensate pH values of gasoline engines
… some of the exhaust gases, which may make the condensate corrosive. For this reason, the extraction point for EGR is usually located downstream of the catalyst, where the gas that condenses with water has substantial amount of ammonia, making the condensate slightly basic but not corrosive. …
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Formation and decay of a Bose-Einstein condensate in atomic hydrogen
The formation and decay of a Bose-Einstein condensate (BEC) in atomic hydrogen is studied. Magnetically trapped hydrogen atoms were evaporatively cooled close to the onset of Bose-Einstein condensation and then suddenly quenched below the transition temperature. The subsequent condensate formation …
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A semi-empirical approach to modelling well deliverability in gas condensate reservoirs.
A critical issue in the development of gas condensate reservoirs is accurate prediction of well deliverability. In this investigation a procedure has been developed for accurate prediction of well production rates using semi-empirical approach. The use of state of the art fine grid numerical …
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