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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 99 for “"pressure conditions"”.
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Stability analysis of natural circulation in BWRs at high pressure conditions
At rated conditions, a natural circulation boiling water reactor (NCBWR) depends completely on buoyancy to remove heat from the reactor core. This raises the issue of potential unstable flow. oscillations. The objective of this work is to assess the characteristics of stability in a NCBWR at rated …
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Implementation of Physiologic Pressure Conditions in a Blood Vessel Mimic Bioreactor System
ABSTRACT Implementation of Physiologic Pressure Conditions in a Blood Vessel Mimic Bioreactor System Kevin Mark Okarski Tissue engineering has traditionally been pursued as a therapeutic science intended for restoring or replacing diseased or damaged biologic tissues or organs. Cal Poly’s Blood …
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Experimental Investigation And Performance Analysis Of The Transformational Challenge Reactor (Tcr) System Under Various Temperature And Pressure Conditions
… 3D-printed ceramic core under various operating conditions. Using nitrogen as a coolant, experiments were performed at pressures ranging from 20.4 bar to 40.8 bar (300 to 600 psi) and temperatures from 100°C to 300°C. The main parameters including gas inlet and outlet temperatures, the TCR wall …
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Measurement of soot precursor particles under atmospheric and low pressure conditions by means of time-of-flight mass spectrometry
… premixed ethylene laboratory flames at different pressures and in a wide range of stoichiometries. Additionally, the exhaust of a gasoline and a diesel engine is investigated. These measurements require the development of a sampling technique capable of transporting the sample from atmospheric …
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Effect of Ethanol Vapor Fumigation on Survival of Salmonella enterica biofilms on Whole Black Peppercorns
… and treated with ethanol vapor under atmospheric pressure conditions and under vacuum assisted pressure conditions. The effect of ethanol vapor, heat and vacuum pressure on the survival of multiple Salmonella enterica serovars within a biofilm contained on low moisture food products (Aw 0.30-0.40) …
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Interfacial Nitrone 1,3-Dipolar Cycloadditions for Modification of Monolayer Protected Gold Nanoparticles
… with a series of nitrones under ambient and high-pressure conditions. Expanding the scope of this reaction to the investigation in synthesizing a nitrone modified-MPN and examine its ability to undergo the 1,3-dipolar cycloaddition reaction with a series of dipolarophiles under ambient and …
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Rheological properties of candle filter deposits at elevated temperatures and pressures
… were independent of elevated temperature conditions, suggesting that the particle adhesion process is controlled by the theological properties of the powder. Per US DOE request an apparatus was built to more accurately simulate candle filtration, and it was used to show that the process …
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Soybean Oil Deacidification Using Membrane Separation and Supercritical Carbon Dioxide
… dioxide provided the appropriate temperature and pressure conditions to use for the membrane separation. Data obtained from the solubility tests showed the best operational conditions in terms of temperature and pressure 45°C and 306 atm, respectively.
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Spectroscopic measurements and modeling of carbonaceous particle combustion in a shock tube
… under short-duration, high-temperature and pressure conditions. This dissertation integrates new shock-tube diagnostics with physics-based models to quantify CNP combustion across free-molecular to transitional heat-transfer regimes. These advances deliver actionable constraints for …
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THE INTERPLAY BETWEEN CATION ORDERING AND ELASTICITY OF OMPHACITES TO UNRAVEL PTT PATHS OF METAMORPHIC ROCKS
… a clinopyroxene stable across a diverse range of pressure and temperature conditions, is one of the main rock-forming minerals of eclogites and is also found in blueschist facies and ultra-high-pressure rocks. Its widespread occurrence makes it a valuable candidate for Raman elastic …
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The contribution of coping related variables and cardiac vagal activity on performance under pressure.
Successful performance under pressure requires effective psychophysiological self- regulation. It is suggested that activity in the parasympathetic nervous system, termed cardiac vagal activity, is a marker of self-regulation as theorised by the neurovisceral integration model (Thayer et al. 2009). …
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The influence of fin height and wall conductivity on integral-fin tubes during steam condensation
… Testing was done at vacuum and atmospheric pressure conditions. The tubes tested had an inner diameter of 12.7mm, a root diameter of 13.88mm, and fin heights ranging from 0.5mm to 1.5mm, in 0.25mm increments. The outside heat transfer coefficient was determined first by finding the overall …
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Roughness Effects on Super Structures in Turbulent Boundary Layer Flows
… = 0.98, small = −0.04, and favorable = −0.60 pressure conditions. It was observed that coherent structures larger than the field of view (FOV) modify their length scales, streamwise orientation and spanwise distribution in response to changes in surface roughness and pressure gradients. The …
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Nanocomposite of ZrO2/Polymer Thin-Film Coatings by the Ionically Self-Assembled Monolayer Technique
… the à ngström-level at ambient temperature and pressure conditions. It was also shown the maximum Vickers microhardness of ZrO2/polymer nanocomposite thin-film coatings prepared by this method was greater than 25 GPa.
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Investigation of the tensile strength of liquid squeeze-films subjected to oscillating normal loads
… under both atmospheric and vacuum ambient pressure conditions. The effects of a number of variables, in particular the mass, contact area, oscillatory frequency, fluid vapor pressure, viscosity, and surface tension, were considered. Results indicated that liquid squeeze-films can be used to …
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Cytokine and Chemokine Profiles in a Rat Model of Hemorrhagic Shock after Immuno-Modulation by Androstenetriol
… rats were hemorrhaged, driven by volume or pressure conditions, then resuscitated with fluids and packed red blood cells following a subcutaneous injection of either vehicle or drug. Blood was collected at various time points and cytokine levels were determined by analyses with both …
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Optical Processes in Xenon: Multiphoton Ionization and Ultraviolet Photodissociation of the Dimer Ion
… and self quenching rate constant. Under high pressure conditions, the dimer ion (Xe(,2)('+)) quickly forms from the atomic ion, and photodissociation on the 1( 1/2)(,u) (--->) 2( 1/2)(,g) band has been observed after sequential UV pumping. Finally, the role of Xe(,2)('+) in the formation of …
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Desalination for Sustainable Water Production with an Emphasis on Low Pressure Distillation
… presented. The purpose is to determine if low pressure conditions are favorable to producing freshwater compared to STP.</p> <p>The final output of this thesis is a proposed algorithm for estimating fresh water mass transfer from a solar vacuum distillation process as a function of heat and …
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Stability analysis of supercritical water cooled reactors
… an advanced reactor that will operate at high pressure (25MPa) and high temperature (500°C average core exit). The high coolant temperature as it leaves the reactor core gives the SCWR the potential for high thermal efficiency (45%). However, near the supercritical thermodynamic point, coolant …
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Characterization and Reactivity of Mo₂C
… was tested for cumene hydrogenation under high pressure conditions, and the effect of sulfur and oxygen poisons on cumene hydrogenation was also investigated. As a complement to the work done on polycrystalline β-Mo₂C, UHV studies of single crystal α-Mo₂C were undertaken to provide fundamental …
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