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 85 for “"CFD models"”.
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Development of CFD models applied to fluidized beds for waste gasification
Le but de ce projet est de développer un modèle CFD fiable pour étudier la dynamique des fluides d'un lit fluidisé en régime bullant pendant la gazéification de combustibles solides de récupération (CSR) triés à partir de déchets solides municipaux (DSM). La gazéification est un processus …
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Unique airflow visualization techniques for the design and validation of above-plenum data center CFD models
… well-verified computational fluid dynamics (CFD) model. Most above-plenum data center CFD models are only validated using temperature data. Although a temperature-only validation method can be useful, it does not confirm that the airflow patterns predicted by the CFD model are accurate. Since …
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Analyzing FLUENT CFD models and data to develop fundamental codes to assess the effects of graphite oxidation in an HTGR air ingress accident
… results obtained through past FLUENT models. In addition, a 2-D FLUENT model was created to perform transient analysis which was previously limited to steady state conditions due to the longer computational time required for the 3-D modeling. This model was also created in an effort to …
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CFD Analysis for Beyond Bubbly Gas-Liquid Two-Phase Flows in a Large Diameter Pipe
… as single-phase computational fluid dynamics (CFD). A literature review has revealed that the current efforts on multiphase flow simulation have focused on small diameter channels under very restricted flow conditions and have been conducted without identifying some important procedures. To …
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Approaches to Simulation of an Underground Longwall Mine and Implications for Ventilation System Analysis
… modeling and Computational Fluid Dynamics (CFD) models. Networking modeling is the most prevalent modeling technique in the mining industry. However, a gob area, which is a void zone filled with broken rocks after the longwall mining, cannot be simulated in an accurate way with networking …
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Advanced experimental modelling of hydrodynamic and aerodynamic wakes in floating offshore wind turbines using particle image velocimetry
… forces. While computational fluid dynamics (CFD) methods are employed to calibrate viscous damping coefficients in POT models to improve accuracy, their high computational cost limits practical use. The reliability of simplified CFD models for refining POT viscous damping remains unexplored, …
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Study to characterise the performance of micro tubular solid oxide fuel cells by the invention of an avant garde experimental apparatus and computational modelling.
… through a combination of experimental work, CFD modelling and numerical analysis. CFD models with an additional fuel cell module have been compared to experimental results for single cells with relation to oxygen concentration, fuel utilisation, I/V curves and external cell temperature …
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Experimental and Modeling Study of the Thermal Management of Li-ion Battery Packs
… to the experimental effort, multi-disciplinary models integrating heat transfer, fluid mechanics, and electro-thermal dynamics have been developed and validated, including detailed CFD models and lumped parameter models. The major contributions are twofold. First, this work developed actively …
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System Identification CFD-Based Reduced-Order Modeling for Hypersonic Vehicles
… were utilized to assemble reduced-order models purposed for estimating the aerodynamic coefficients of a hypersonic vehicle subjected to flight conditions of interest. The reduced-order models combined the accuracy of high-fidelity hybrid Reynolds Averaged Navier-Stokes (RANS) and Large …
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Volumetric Particle Streak -Tracking Velocimetry and Its Application in Indoor Airflow Measurements
… were also simulated numerically using commercial CFD (computational fluid dynamics) software. Through a preliminary comparison between the results from the simulations and the experimental measurements, the performances of the different CFD models were evaluated.
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Multiscale CFD simulations of entrained flow gasification
… were designed before it was practical to apply CFD models. Moreover, gasification CFD models developed over the years may have lacked accuracy or have not been tested over a wide range of operating conditions, gasifier geometries and feedstock compositions. One reason behind this shortcoming is …
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Numerical Investigation of Scaling Effects of a Ramjet-Powered Projectile
… is evaluated using high-fidelity RANS CFD models. Sensitivity to nonequilibrium laminar and turbulence-limited chemistry, and transitional turbulence treatments are evaluated. The physical sources of small scale performance limitations are identified for both fuel types. Finally, …
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Uncertainty Analysis of Computational Fluid Dynamics Via Polynomial Chaos
… in performing uncertainty analysis of CFD models using conventional methods are associated with cost and effort. For these reasons, there is a need for the development and implementation of efficient stochastic CFD tools for performing uncertainty analysis. One of the main contributions …
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Manufacturing Variability in High Pressure Turbine Rotor Blades
… then mapped to computational fluid dynamics (CFD) models and assessed aerodynamically. For the first study, blade sections were analysed using MIT’s Multiple Blade Interacting Streamtube Euler solver (MISES). The distribution of blade surface curvature was found to influence the blade surface …
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Hydroxyl-Radical Planar Laser-Induced Fluorescence Imaging of Turbulent Supersonic Combustion
… the validation of computational fluid dynamics (CFD) models.
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CFD study of the combustion of innovative fuels in blast furnaces for sustainable iron making
… thesis, several computational fluid dynamics (CFD) models are developed and applied to simulate the combustion of innovative fuels under real BF conditions. Firstly, a 3D CFD model is developed to simulate the flow and thermochemical behaviours of the pulverised biomass injection (PBI), and …
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Aerosol Transmission of COVID-19 and other Airborne Diseases in office environments using Computational Fluid Dynamic Modeling and Machine Learning
… they can have. Computational fluid dynamic (CFD) models and simulations and machine learning (ML) are powerful tools that allow engineers to create models to predict and advance tools to fight these airborne diseases. The research in this thesis studied the effects of heating, air …
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MANAGING CRYOGENIC ENERGY FLUID STORAGE AND TRANSFER OPERATIONS
… Vapor-liquid Interface. It surpasses existing CFD models in literature and commercial simulators, delivering rapid and comprehensive results. Our model is integrated into a dashboard tool that utilizes real operational data to predict visual profiles of variables like liquid level, temperature, …
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Infrared imaging: a proposed validation technique for computational fluid dynamics codes used in STOVL applications
… technique for computational fluid dynamics (CFD) codes in STOVL applications has led to research efforts to apply infrared thermal imaging techniques to visualize gaseous flow fields. Specifically, a heated, free-jet test facility was constructed. The gaseous flow field of the jet exhaust was …
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Performance investigation of a naturally driven building ventilation terminal.
… carried out using Computational Fluid Dynamics (CFD) and far-field experimentation.An extensive literature review was carried out to provide the framework for this investigation. Building on existing (developed) research techniques, the knowledge gaps identified in this subject area, were …
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