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 13 of 13 for “"Sand Deposition"”.
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Experimental Investigation of Initial Onset of Sand Deposition in the Turbine Section of Gas Turbines
Particle ingestion and deposition is an issue of concern for gas turbine engines operating in harsh environments. The ingested particles accelerate the deterioration of engine components and thus reduce its service life. This effect is observed to a greater extent in aircrafts/helicopters operating …
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Experimental Investigations of the Onset of Sand Deposits on Hastelloy-X between 1000 C and 1100 C
… primary gas path components through erosion or deposition. Characterizing crystalline deposits on metallic substrates can allow for the prediction of deposition to improve component resilience and develop health monitoring algorithms. This work investigates the effect of temperature and angle on …
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Refining tsunami inundation limits for the 1700 CE Cascadia earthquake: detailed mapping of fine-grained deposits and diatom biostratigraphy at the Salmon River estuary, central Oregon
… evidence of coseismic subsidence and sandy tsunami deposits preserved in coastal wetlands provide tangible evidence of the 1700 CE Cascadia Subduction Zone (CSZ) earthquake and tsunami. Such evidence has been used to evaluate earthquake source models by comparing simulated tsunami …
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Computational fluid dynamics (CFD) modelling of critical velocity for sand transport flow regimes in multiphase pipe bends.
… by particulate solids deposit - such as the sand particles that can accompany hydrocarbon production. Knowledge of the flow characteristics of solid particles in fluids when transported in pipelines is important, in order to accurately predict solid particle deposition in pipelines. This …
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Modeling multiphase solid transport velocity in long subsea tiebacks: numerical and experimental methods.
… pressure drop, particle drag and lift forces, sand/liquid/gas holdup, flow rate requirement, and tieback sizing etc. at the early design phase and during operation for process optimisation. This research investigated sand transport characteristics in multiphase, water-oil-gas-sand flows in …
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Hydrodynamic and sediment transport modeling of deltaic sediment processes
… be used by the engineers to estimate scour and deposition for proposed artificial feeder channels. These curves suggest that a discharge of at least 11,325 cms (400,000 cfs) at Morgan City is necessary to transport sand into the delta. It was observed that even for a very high flood, sand …
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Process Sedimentology and Three-Dimensional Facies Architecture of a Fluvially Dominated, Tidally Influenced Point Bar: Middle McMurray Formation, Lower Steepbank River Area, Northeastern Alberta, Canada
… divided into three genetically related groups: sand-dominated facies, inclined heterolithic stratification (IHS) facies and mixed heterolithic facies. Together, these facies are interpreted to represent a fluvially dominated, tidally influenced point bar that experienced strong seasonal …
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Early Mesozoic stratigraphy, sedimentology and structure of the
… facies from the Abu Shaybah Formation represent deposition in a shallow marine environment as part of low gradient continental margin, succeeded by sand deposition in braided and meandering fluvial systems. Regional tectonic activity, regional relative sea-level fluctuations and climatic …
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Caracterização morfodinâmica das praias de Tambaú e Manaíra – João Pessoa.
… of change in stream sediments. There’s also a sandy tip that divides Tambaú beach, where we can notice a significant differentiation on the sand deposition. That’s why in the south side of the hotel, there’s a beach with an ‘estirâncio’ (specific term in Portuguese for a geographic …
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3D Seismic Interpretation of Turbidite-Sands from the Gulf of Mexico
… was given to salt diapers. Their influence on sand accumulations and hydrocarbon traps were investigated. Two Pleistocene sands accumulations (4500-ft & 8500-ft) were examine thoroughly in this research. Time and amplitude maps were produced. In addition, a wave-theoretical model that describes …
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Coastal Overwash: Processes and Modelling
… mainland coasts are striking. Overwash may cause deposition of sand on and landward of the beach crest, large fan shaped deposits on back barriers, large sheet like deposits over an entire barrier, sand deposition into back barrier waterways, or may even lead to breaching of coastal barriers. It …
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A Palaeoecological approach to understanding the impact of coastal changes in Late Holocene societies using the Isles of Scilly as a case study
… was highly varied. The occurrence of blown sand in the sample cores has been used as an indicator of past storm intensity, by high resolution particle size analysis and Loss-On-Ignition. The three cores show dissimilarities in the storminess indicator during the same periods. It is argued …
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Large Eddy Simulations of Sand Transport and Deposition in the Internal Cooling Passages of Gas Turbine Blades
… particulate matter can be ingested, especially, sand, ash and dirt. Particulate matter in different engine components can lead to degradation in performance. The objective of this dissertation is to investigate sand transport and deposition in the internal cooling passages of turbine blades. A …