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 119 for “"Computational fluid dynamic"”.
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Computational Fluid Dynamic Study of Heaving-to
This study looks at the fluid interactions from the wake of a sail boat performing the heaving-to storm tactic in heavy weather seas with the waves. This interaction causes the wave height in the wake to be reduced. The fluid flow in the top layer of the wave is seen to move with the wake as the …
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A computational fluid dynamic investigation of rowing oar blades
This thesis describes the application of computational fluid dynamics (CFD) to model the flow regime around rowing oar blades. The two phase flow that was present at the surface between the water and the air was also incorporated into the CFD model. Firstly, a quasi–static method was applied, …
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Transient Computational Fluid Dynamic Modeling of Baffled Tube Ram Accelerator
Transient computational fluid dynamic modeling in laboratory frame of reference was used to investigate baffled tube ram accelerator operating characteristics in inert and reactive mixtures. The minimum entrance Mach number that allowed supersonic projectile transit through a baffled tube filled …
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Computational Fluid Dynamic and Rotordynamic Study on the Labyrinth Seal
… forces generated in the seal. The working fluid usually has a circumferential velocity component before entering the seal; the ratio of circumferential velocity and shaft synchronous surface velocity is defined as pre-swirl rate. It has been observed that pre-swirl rate is an important …
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Computational fluid dynamic investigations of flow through an aged CANDU pressure tube
Single-phase, isothermal computational fluid dynamics simulations of twelve simplified CANDUTM 37M fuel bundles sitting in both as-received and aged pressure tubes were performed with Hydra in this work. The predicted coolant flow behaviour of two cases were compared in order to investigate the …
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Computational Fluid Dynamic Solutions of Optimized Heat Shields Designed for Earth Entry
Computational fluid dynamic solutions are obtained for heat shields optimized aerothermodynamically using Newtonian impact theory. Aerodynamically, the low-order approach matches computational simulations within 10%. Benchmark Apollo 4 solutions show that predicted heat fluxes under-predict …
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Computational fluid dynamic based optimisation of an industrial axial fan for rapid prototyping
… through the development of a first-revision, Computational Fluid Dynamics (CFD) based, optimisation tool which allows for rapid prototyping of a ducted axial fan. The result is an ElementalTM-based multi-disciplinary software tool, comprising 2D CFD, mesh movement, and constrained geometric …
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Computational fluid dynamic (CFD) optimization of microfluidic mixing in a MEMS steam generator
… mixing in microchannels is addressed through a computational fluid dynamics (CFD) study using the ADINA-F finite element program. The study is motivated by the need to design an adequate mixing chamber for aqueous chemical reactants in a micro steam generator. The study focuses on the geometric …
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Overview of the Computational Fluid Dynamic Analyses of the Virginia Tech/NASA BeVERLI Hill Experiments
Computational fluid dynamics (CFD) methods and schemes have been evolving at a rate that significantly outpaces the equipment needed to readily utilize them at scale. This lack of computational resources has resulted in an increased reliance on turbulence models and the need to know where …
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Aerosol Transmission of COVID-19 and other Airborne Diseases in office environments using Computational Fluid Dynamic Modeling and Machine Learning
… can spread and the lasting impact 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 …
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Development of an infrared gaseous radiation band model based on NASA SP-3080 for computational fluid dynamic code validation applications
… technique and as a validation technique for computational fluid dynamics (CFD) codes has led to an in-depth study of infrared band models. The ability to create fast and accurate images of airframe and plume infrared emissions often depends on the complexity of the band model. An infrared …
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Studie návrhu kalového čerpadla s vířivým kolem
… Přehledně shrnuje základní informace o hydrodynamických čerpadlech s výraznějším zaměřením na kalová čerpadla. Obsahuje návrh vířivého oběžného kola, který je v práci podpořen CFD (Computational Fluid Dynamic) výpočtem v software Fluent. Cílem práce je konstrukční návrh vířivého oběžného …
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CFD modelling of flow distortion using OpenFOAM
This thesis presents a computational fluid dynamic (CFD) study of flow related to wind engineering. The open source CFD code OpenFOAM was applied to three cases (i) flow over an oil platform, (ii) flow over a complex terrain and (iii) flow over a met mast. In order to verify the results, …
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Modeling and Control of Batch Pulsed Top-spray Fluidized bed Granulation
… thesis, a thorough study of the batch top-spray fluidized bed granulation was carried out including experimental study, population balance model (PBM), computational fluid dynamic (CFD) study and control strategy development. For the experimental study, the influence variables of pulsed …
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Convective heat transfer in rotating, circular channels
… a rotating reference frame are obtained through computational fluid dynamic (CFD) analysis for Rossby numbers Ro ~1-4 and Reynolds numbers Re ~1,000-2,000. The heat-transfer model is first validated according to Nusselt number correlations for laminar, developing flow in circular tubes and by …
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A self corrective vortex fluxing method for viscous fluid structure interaction problems
Computational Fluid Dynamic Solvers for flow structure interaction problems rely on a delicate treatment of fluid and grid properties close to the boundary. Although such an approach is accurate, it proves to be inflexible when applied to complex deforming geometries. Here we combine remeshed vortex …
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Design & development of innovative proton exchange membrane fuel cells
… Through a combination of numerical analysis, computational fluid dynamic modelling and experimental work, effective flow plate designs, flow field configurations and materials are analysed and new innovative designs are proposed. The flow plate of a PEM fuel cell is one of the most important …
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Interactive calculation of cross-sectional areas for aircraft design and analysis
… restructure the data in a manner compatible with computational fluid dynamic codes for predicting viscous flow drag, and to compute and display the axial distribution of cross-sectional area normal to the free-stream airflow. The second program is an extension of an existing conceptual design code …
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