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 18 of 18 for “"UDF"”.
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Characterization of Polymorphic Microsatellites in Strawberry and Their Transferability to Other Genera in the Rosaceae Family
… species in Rosaceae. Products generated by UDF-003 and UDF-018 primers were sequenced. Sequencing results for UDF-018 showed that three species, i.e., Pyrus calleryana, Prunus persica and Rubus idaeus contained the expected microsatellite whereas another four, i.e., Cotoneaster salicifolius, …
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Measurements and Modeling of Coal Ash Deposition in an Entrained-Flow Reactor
… on ash deposition into a User-Defined Function (UDF) for a commercial comprehensive combustion and CFD code. Results from the new submodel and CFD code is are then compared to deposition measurements in on a simulated boiler tube where particle mass deposited and ash size distribution are …
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Inkatha, Propaganda, and Violence in KwaZulu-Natal in the 1980s and 90s
… Congress (ANC) and the United Democratic Front (UDF) and on the other was Inkatha, secretly backed by the Apartheid state. Originally a Zulu nationalist liberation movement aligned with the ANC, Inkatha separated with the ANC over issues of ideology and politics. Instead, Inkatha secretly began …
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Implementation of a trim routine in a rotor model for the numerical simulation of helicopter flow-fields
… through the use of a User Defined Function (UDF). The method used to trim the rotor was the Newton-Raphson Iterative method. This trim routine was incorporated in the UDF used for the rotor model. Tests were conducted, on a 'rotor-alone' model, as well as the rotor and fuselage model. The …
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Leisure and the making of KwaMashu, 1958-1989
… created conflict between Inkatha and the ANC/UDF supporters in KwaMashu and how this conflict affected the participation in leisure and recreational activities in the 1980s.
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A Computational Fluid Dynamics Model to Simulate Wood Combustion
… char oxidation, a conjugate heat transfer driven UDF model was developed in ANSYS Fluent. This char oxidation model was validated against wind tunnel experiments of smoldering firebrands at various wind speeds. The pyrolysis and char oxidation models were coupled together with a gas phase methane …
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Aerosol Transmission of COVID-19 and other Airborne Diseases in office environments using Computational Fluid Dynamic Modeling and Machine Learning
… by utilizing the user defined function (UDF) tool of ANSYS Fluent. It was shown that the resulting risk models were quick and effective at predicting high risk areas using spatial data or predicting regions of high risk over time. Future research will refine this method by creating higher …
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Reconsideration of the Battle of Sandfontein : the first phase of the German South West Africa campaign, August to September 1914
… it, and analysing how nearly three hundred UDF troops endured the horror of being trapped and shelled for a full day on a desert koppie. Besides describing, contextualising, utilising, and challenging the older historiography on Sandfontein, which consists essentially of dated patriotic …
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Aplicaciones clínicas de modelos de dinámica de fluidos en patología respiratoria = Clinical applications of fluid dynamics models in respiratory disease
… a través de una función definida por el usuario (UDF por sus siglas en inglés, User Defined Function) programada para este objetivo, permitiendo obtener resultados del funcionamiento global del modelo completo operando únicamente a través de ocho ramales. También fue programada otra UDF que …
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Ram air turbine enhancement for auxiliary power unit replacement
… the dynamic mesh and user define function (UDF) were used to revolve the rotor turbine via wind. This study was performed in two stages. The first stage was conducted to evaluate the power produced from a single-rotor RAT. Three RATs were required to fulfill the APU power output, and the …
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Uncertainty and sensitivity analysis of computational simulations of industrial jet flows
… were also implemented in User Defined Functions (UDF) introducing negligible errors in the simulations. Second, a framework is presented for the propagation of uncertainties in the computational research of under-expanded jets. For this aim, experimental and turbulence uncertainty is input to the …
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New technology for thermal desorption feeding with concentrating solar power (csp) system [Nuove tecnologie per il desorbimento termico alimentato con solare a concentrazione]
… simulazioni mediante User-Defined Functions (UDF), per progettare un sistema di DT alimentato da fonti rinnovabili. La configurazione proposta, studiata con riferimento alle coordinate geografiche specifiche di Gela (CL, Italia), si basa sull’accoppiamento di un sistema energetico con solare a …
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Computational fluid dynamics modelling of PEM fuel cells to investigate transport limitations.
… (CFD) technique. A user defined function (UDF) code was developed considering source terms for porous zones, effective diffusivity models for species transport inside cells and electrochemical reactions at catalyst layers to predict cell voltage at an average current density. The average …
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Studies of turbulent flows in continuous casting of steel with and without magnetic field
… and Hanjalić using a user defined function (UDF) in FLUENT. This work revealed varying accuracies of different RANS models at different levels. This work is useful for industry to understand the accuracies of these models, including continuous casting. After realizing the accuracy and …
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Development of a coupled CFD—system-code capability (with a modified porous media model) and its applications to simulate current and next generation reactors
… in the CFD code using User-Defined Functions (UDFs). • Demonstrate the porous media simulating capability by a nuclear system using a combined CFD model of clear flow and porous media flow(for core region). • Propose a hybrid approach to couple a CFD code with a nuclear system code. Develop the …
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Computational Fluid Flow Analysis of the Enhanced-Once through Steam generator Auxiliary feedwater system
… of the EOTSG. Using user defined functions (UDF), the loss coefficients of the leakage flows were implemented on the 1/8th sector of the EOTSG computational model to provide boundary conditions at the bypass flow and leakage flow locations With this method, the number of tubes wetted in the …
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Simulating Bluff-body Flameholders: On the Use of Proper Orthogonal Decomposition for Combustion Dynamics Validation
Contemporary tools for experimentation and computational modeling of unsteady reacting flow open new opportunities for engineering insight into dynamic phenomena. In the work presented here, a novel use of proper orthogonal decomposition (POD) is described to validate the structure of dominant heat …
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A comparative study of the aims structure and strategies of the National Party and Inkatha National Cultural Liberation Movement in the decade 1975-1985
… Forum (NF), and the United Democratic Front (UDF). Their relations with both the NP and Inkatha in terms of their aims and strategies were marked by what one may convoke "timorous digressions." Most of them referred to the NP Government as illegitimate while viewing Inkatha as perpetrating …