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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 84 for “"CFD analysis"”.
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Closed-Loop CFD Analysis of the Fontan Cardiovascular Circulation
<p>One out of 150 newborn babies born with congenital heart disease, approximately 7.5% of those infants have a single ventricle (SV). The Fontan operation, which is a procedure to create a harmonious circulation in SV patients, has been performed for a long time to save the newborn patients. In …
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A coupled DEM/CFD analysis of die filling process
… the particles and Computational Fluid Dynamics (CFD) for the air with a two-way air-particle interaction coupling term. The effects of air and particle properties (size, density, size distribution, cohesion etc.) on powder flow are explored. The results are in a good agreement with experimental …
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CFD Analysis for Optimization of Vertical Axis Wind Turbine Farms
… URANS (Unsteady Reynolds Averaged Navier Stokes) CFD simulation were performed in STAR CCM+ software. Validation of the CFD simulation was done by simulating a rotor in isolation and its blade torque profile was compared to the results of published research. The validation of results proved that …
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Grid Generation and CFD Analysis of Variable Geometry Screw Machines
… available to generate deforming grids for the CFD analysis of 3D transient flow in screw machines are algebraic and differential. Grids that maintain the cell count and connectivity, during solution, provide the highest accuracy and customised grid generation tools have the capability to …
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A CAD-centric Approach to CFD Analysis With Discrete Features
… approach for downstream analyses such as FEA, CFD, heat transfer, and vibrations. A CAD-centric approach will be applied to the CAD-to-CFD process to help industry in an ongoing quest to shorten the design cycle time. The CAD-centric approach consists of using the CAD model as a source of data …
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CFD analysis and redesign of centrifugal impeller flows for rocket pumps
The analysis and redesign of a centrifugal impeller for a rocket pump is presented in this thesis. A baseline impeller was designed by Rocketdyne for the NASA Marshall Pump Consortium. Initially, the objective was to reduce the circumferential exit flow distortion of the baseline impeller. Later in …
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A CFD analysis of the pressure drop through misaligned Stirling engine regenerators
… misalignment was 44% to 49%. A 3-dimensional CFD model was validated against previous empirical results, and used to determine the effect of wire mesh misalignment on the pressure drop for ow through a regenerator. A friction factor correlation equation was developed and it was found that a …
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CFD analysis of reactive crystallisation in stirred tanks : a focus on nickel hydroxide
The recovery of metal values from aqueous streams via precipitation, or reactive crystallisation, is both an economically and environmentally significant unit operation in a wide spectrum of industries. However, the control and operability of these systems is hampered by the limited fundamental …
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Fouling in membrane technology for produced water treatment: Assessing mechanisms, mitigation, and CFD Analysis
… We used computational fluid dynamics (CFD) to prove the limitation of these blocking laws/Hermia’s models, originally developed for solid-liquid separation in pressure-driven system and extended them to cover the modeling approach of crossflow filtration. First, a comprehensive study …
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CFD Analysis of Aspirator Region in a B&W Enhanced Once-Through Steam Generator
This analysis calculates the velocity profile and recirculation ratio in the aspirator region of an enhanced once-through steam generator of the Babcock & Wilcox design. This information is important to the development of accurate RELAP5 models, steam generator level calculations, steam generator …
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CFD analysis of airflow patterns and heat transfer in small, medium, and large structures
… for occupants. Computational fluid dynamics (CFD) can be utilized to visualize and simulate expected flows in buildings and structures. CFD gives architects and designers the ability to calculate the velocity, pressure, and heat transfer within a building. Previous research has not modeled …
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CFD Analysis for Beyond Bubbly Gas-Liquid Two-Phase Flows in a Large Diameter Pipe
… of multiphase flow phenomena, numerical analysis for multiphase turbulent flow is not as reliable 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 …
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CFD analysis and design of a low-twist, hovering rotor equipped with trailing-edge flaps
This thesis reports the analysis and design of a hovering rotor equipped with both slotted and blended trailing-edge flaps. This was accomplished by combining a simple blade element method with 3D inviscid and RANS CFD that allowed for a robust sequence of design specification, analysis, and …
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Oscillatory Flow As A Means Of Enhanced Species Separation: A Three Dimensional Time-accurate Cfd Analysis
… studies which were undertaken using asymptotic analysis, the present models and results incorporate full entrance effects and 3D interactions. Results of this study will be useful as a guide for the design and miniaturization of an oscillating device for species separation in further research …
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A TWO-PHASE CFD ANALYSIS OF GEYSERING WITH APPLICATIONS TO THERMOSYPHONS AND LOW PRESSURE POOL BOILING
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-12-04 without embargo terms
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CFD analysis of three-dimensional thermalhydraulics flow effects on wall concentration gradient profiles for Lbe loop fittings
The objective of the thesis is to study the effects of thermalhydraulics flows on the wall concentration gradient profiles in LBE loop fittings. To that end detailed models of the fittings have been constructed to study these effects. These fittings include sudden expansion, sudden contraction, …
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CFD analysis of heat storage and recovery from geothermal water exiting the space heating radiator using phase change material
… research focuses on Computational Fluid Dynamic (CFD) analysis of the heat storage and recovery process. The present work uses a CFD tool (Ansys Fluent) for simulating heat transfer from the hot water flow, phase change during melting and solidification process and heat recovery from the phase …
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