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 30 for “"flow network"”.
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Fluid flow through connected sub-seismic features in mudstone
… was studied to investigate the controls on fluid flow through low permeability clastic rock. Turbidite flows are present within the shale as very thin (1-5mm) fine grained sandstone beds, channels and lenses which would not be picked up by wireline logging. The shale is cut by a series of …
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On the impact of variability and assembly on turbine blade cooling flow and oxidation life
… on the quantity and temperature of the cooling flow sup- plied to the blade. The focus of this thesis is the impact of variability on blade cooling flow and, subsequently, its impact on oxidation life. A probabilistic analysis is performed on a commercial jet engine to quantify the variability …
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Comparison of Two Algorithms for Removing Depressions and Delineating Flow Networks From Grid Digital Elevation Models
… (DEMs) and their derivatives such as slope, flow direction and flow accumulation maps, are used frequently as inputs to hydrologic and nonpoint source modeling. The depressions which are frequently present in DEMs may represent the actual topography, but are often the result of errors. …
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Material transport system design in manufacturing
… decisions of technology selection and flow network design. This research is motivated by the design of material transport systems (MTS) in manufacturing plants. The objective is to design a MTS with minimum lifetime costs, subject to service requirements, flow network restrictions, and …
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A reduced order modelling methodology for external cylindrical concentrated solar power central receivers
… is built on a one-dimensional thermofluid network to model the heat transfer through the tube walls, coupled to a fluid flow network of the solar salt flowing inside the tubes. This is combined with a neural network surrogate model to determine the radiative heat flux impinging upon the …
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Geometric methods for optimizing ramified flow networks
… approaches, optimal characteristics of nonlinear flow networks were examined. The first model studied was that of a fractal-like desalination plant. Solving the equations of diffusion by analogy to electrostatics, desalination graphs superimposed on the diffusion gradients were optimized to …
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Application of Morphometric Relationships to Active Flow Networks Within the Mammoth Cave Watershed
… to describe the nature of surface-drainage networks. These parameters have been used in various studies of geomorphology and surface-water hydrology, such as flood characteristics, sediment yield, and evolution of basin morphology. Little progress has been made in applying these quantitative …
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ΑΝΑΠΤΥΞΗ ΚΡΙΤΗΡΙΩΝ ΚΑΙ ΤΕΧΝΙΚΩΝ ΓΙΑ ΤΗΝ ΕΝΕΡΓΕΙΑΚΗ ΑΝΑΔΙΑΡΘΡΩΣΗ ΧΗΜΙΚΩΝ ΒΙΟΜΗΧΑΝΙΩΝ
THE OPTIMAL SYNTHESIS OF HEAT EXCHANGES NETWORKS IS THE MOST EFFICIENT METHODOLOGY FOR ENERGY CONSERVATION AND RECONSTRUCTION FOR ENERGY SAVING, IN GENERAL, IN THE CHEMICAL INDUSTRY. THE SUBJECT IS MAINLY TACKLED BY MEANS OF THE DEVELOPMENT OF CERTAIN CRITERIA AND HEURISTICS BASED ON …
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Agricultural virtual water flows within the USA
… a comprehensive assessment of virtual water flows within the USA, a country with global importance as a major agricultural producer and trade power. This is the first study of domestic virtual water flows based upon intra-national food transfer empirical data and it provides insight into how …
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Hybrid flow data center network architecture design and analysis
In this thesis, we propose a hybrid flow network architecture for future data center. The hybrid flow architecture has its origins in the early 1990s with studies on all-optical networks and fiber-optical computer networks. Research in optical flow switching has spanned over two decades. Our …
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Coolant distribution control in satellite structural panels using electrohydrodynamic conduction pumping
… control the distribution of coolants within a flow network and may be applied to a novel biologically-inspired thermal control system. This experiment characterizes the performance of an EHD pump operating under various flow conditions and demonstrates the successful control of flow …
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Understanding and modeling food flow networks across spatial scales
… from one location to another as ‘food flows’, reserving the term ‘food trade’ for the international exchange of food commodities between countries. Food flows underpin the complex food supply chains that are prevalent in our increasingly globalized world. Recently, much effort has been …
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SIMNET, a primal Simplex code for networks
… problem. The transportation problem is a flow network model in which every node is either an origin or a destination. Typically, the origins are production plants and the destinations are consumer markets for some commodity, and a cost is associated with shipping one unit from a given …
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Thermal-hydraulic optimization for high production of low-enriched uranium based molybdenum-99
… to hydraulically and thermally model the coolant flow through the current reactor setup. Using flow network modeling (FNM), this analytic model is expanded to analyze other potential geometries that could maximize heat transfer. The findings show that for a single channel under the existing …
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Learning with Degree-Based Subgraph Estimation
Networks and their topologies are critical to nearly every aspect of modern life, with social networks governing human interactions and computer networks governing global information-flow. Network behavior is inherently structural, and thus modeling data from networks benefits from explicitly …
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Low-latency network coding for streaming video multicast
Network coding has been successfully employed to increase throughput for data transfers. However, coding inherently introduces packet inter-dependencies and adds decoding delays which increase latency. This makes it difficult to apply network coding to real-time video streaming where packets have …
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Optimization-simulation framework to optimize hospital bed allocation in academic medical centers
… allocations. This motivates the development of a network-flow/network design inspired mixed integer program that approximates the operational performance of bed allocations and allows us to effectively search for approximately the best allocation. The mixed integer program can be solved via a …
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Quantitative information-flow tracking for real systems
An information-flow security policy constrains a computer system's end-to-end use of information, even as it is transformed in computation. For instance, a policy would not just restrict what secret data could be revealed directly, but restrict any output that might allow inferences about the …
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Experimentally validated multiscale thermal modeling of electronic cabinets
… scheme was developed using the concept of flow network modeling to couple the heat and mass flow rates and pressure at each interface, when interconnecting ROMs together to simulate the entire system. Thermal information was then subsequently extracted from the global modeling and applied …
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Design of an internally pressurized aerostatic journal bearing for thermoacoustic engines
… bearing is established by the continuous flow of gas in the clearance gap from a high pressure reservoir that is charged with gas from the engine's cavity to low pressure reservoirs that are drained to the engine's cavity both inside the engine's piston. A numerical model of this bearing …
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