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 23 for “"Liquid Fraction"”.
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Atomization and Deposition in Two-Phase Annular Flow: Measurement and Modeling (Pressure Drop, Thin Films, Turbulent Dispersion)
… annular two-phase flow and of deposition of this liquid back to the liquid film. These models have been incorporated into a design scheme for the prediction of two-phase pressure drop and fully developed entrained liquid fraction for the annular regime.
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A study of surface porosity formation in deposits sprayed onto flat substrates by the Uniform Droplet Spray process
… by experimentation on the effect of the droplet liquid fraction and the substrate thermal state on the final splat geometry. Pure tin droplets ( 416 [mu]m) are deposited on stainless steel substrates. A droplet liquid fraction of 83% and stainless steel substrate temperature between 150°C and …
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Influence of nutrition on the muscle transcriptome and ruminal microbiome in cattle
… richness decreased (linear; P < 0.05) in the liquid fraction for steers fed greater CDS. At the phyla level, relative abundance of Bacteroidetes decreased in steers fed increasing dietary inclusion of CDS as Firmicutes increased to 82% of sequences for the 27% CDS treatment. The most abundant …
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Feasibility study of rapid prototyping using the uniform droplet spray process
… Droplet Spray (UDS) process. Straight and stable liquid metal jets are crucial requirements in the application of UDS to rapid prototyping. Methods to maintain the jet straight and stable were developed. Hardware improvements include an auxiliary orifice mounting fixture and a new crucible bottom …
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Effects of temperature conditions and heat treatment within a multiple effect evaporator on thin stillage fouling characteristics
… biorefineries in the US. Thin stillage is the liquid fraction of unfermented materials from fermentation and is composed of carbohydrate, protein, fat and ash. Research on thin stillage fouling has focused on effects of corn oil, pH, Reynolds number, solids concentration and carbohydrates …
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Downhole Gas Separator Performance in Sucker Rod Pumping System
… gas velocity in the annulus and the superficial liquid velocity inside theseparator. These relations were then applied to model the performance of the separator when operating in conjunction with a sucker rod pump. This model used actual plunger velocity data from different types of surface units …
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Urea-N Recycling in Lactating Dairy Cows
… (P = 0.1) to increase bacterial N flow in the liquid fraction. The NRC 1989 model predicted flow of microbial N and total N from the rumen more accurately than the NRC 2001. The NRC 2001 model predicted a higher RDP requirement and a lower RUP requirement for all four diets compared with the …
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Molecular Origins of Phase Stability in Phase-Change Nano-Emulsions for Thermal Energy Storage by NMR Spectroscopy
… of phase instability in PCMs nano-emulsions, liquid-state nuclear magnetic resonance (NMR) measurements were applied to a model PCM nano-emulsion. Quantitative <sup>1</sup>H single-pulse NMR measurements established the liquid fraction of oil within nano-emulsions as a function of temperature, …
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Finite element simulation of three-dimensional casting, extrusion and forming processes
… The fluid inside the mushy region (between liquid and solid regions) is assumed to obey D’Arcy’s law for flow through porous materials. The permeability of the material is determined as a function of liquid fraction. This forces the velocities in the solid region to zero. In the finite …
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The Role of Fuel Droplets in Laminar Flame Propagation
… fuel, and a spray flame with fuel in liquid and vapour form. Gas phase velocity was measured using particle image velocimetry, from which the reference flame speed was approximated. Liquid phase properties, including droplet diameter, velocity, and concentration, were measured using …
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Fundamental studies of aerosol combustion
… was shown to be a function of drop size and liquid fraction. From the study, it was concluded that burning velocity enhancement probably is caused by the increase in surface area due to wrinkling, caused by the development of instabilities. At low temperature (<275K) the formation and …
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Block copolymer Ion gels for CO2 Separations
… of triblock copolymers, and an ionic liquidIn this thesis project, the target is to study the gas separation performance of ion gels for CO2 separation, and seek ways to optimize their properties in terms of the gas separation performance and mechanical strength. Ionic liquids have …
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Performance measurement and visualization on the refrigerant distribution in the vertical manifold of the microchannel tube heat exchanger
This project studies the liquid refrigerant distribution of an intermediate vertical manifold in a multi-pass evaporator. A new test rig is designed and built to circulate R410A through the vertical microchannel manifold. Refrigerant is circulated into the manifold through the lower set of parallel …
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Rapid Phytate Quantification in Manures and Runoff Sediments using HPIC
Accurate quantification of phosphorus (P) fractions in manures and agricultural runoff is vital to understanding P dynamics in the environment. Phytate is an organic form of P, with 6 phosphate groups, which is found in manures, but is difficult to quantify due to its affinity for complex formation …
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USE OF GAS EMISSION BY BIOELECTROCHEMICAL APPROACHES FOR POWER-TO-X
… of biogas-derived CO2 and NH3-rich digestate liquid fraction from anaerobic digestion, es-tablishing a circular economy loop. Single-cell protein production was tested in double-chamber microbial electrosynthesis cells (MES) at different cathode polarizations (−0.6 and −1.0 V vs Ag/AgCl), …
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CFD Modeling and Optimization Analysis of Thermal Energy Storage Based Solar Collectors
… operations. The results show that the solid-to-liquid phase change process was expedited by 48 minutes when the HP shifted from the top to the center of the glass tube. On the other hand, during normal operation, the maximum liquid fraction of PCM reached up to 98% in an optimized system whereas …
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Numerical investigation on the effect of fuel droplets on premixed laminar flames
This thesis explores the combustion of liquid fuels, a process widely applied in industry, with a particular focus on laminar premixed flames containing fuel droplets. Despite their prevalence, these flames have not been extensively studied due to challenges in measuring key parameters and …
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Catalytic Pyrolysis of Cellulose, Hemicellulose and Lignin Model Compounds
… catalysts increased the yields of the organic liquid fraction, total liquid and char while decreasing the gas yields. However the catalyst decreased the organic and char yields while increasing the water yields but there was no change in gas yields. The NaOH treatment caused a decrease in the …
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Investigating cultivation and biorefinery process techniques on the microalgae Porphyridium aerugineum and Chromochloris zofingiensis
… biorefinery route proposed obtained five fractions that were largely composed of 1) EPS, 2) phycocyanin, 3) soluble carbohydrates, 4) carotenoids, chlorophyll, and lipids, and 5) starch. The findings suggest that P. aerugineum could be the next commercial source of phycocyanin due to the …
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Characteristics of heat transfer fouling of thin stillage using model thin stillage and evaporator concentrates
… centrifuged to separate solids as wet grains and liquid fraction as thin stillage. Evaporator fouling occurs during thin stillage concentration to syrup and decreases evaporator performance. Evaporators need to be shutdown to clean the deposits from the evaporator surfaces. Scheduled and …
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