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 12 of 12 for “"Turbulent models"”.
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Aerodynamic comparison and validation of rans, K-ω, standard K-ɛ and URANS simulations of flat plate film-cooling
… aims to provide comparison between various turbulent models available for the Reynolds Average Navier Stokes (RANS) analyses and extended to unsteady Reynolds Average Navier Stokes (URANS). The numerical investigations make used of ANSYS CFX ver. 14 and were carried out at Reynolds Number, …
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Numerical Investigations of the Fluid Flow and Heat Transfer and Construction of Control System for the Canadian Supercritical Water-Cooled Reactor Power Plant
… investigated to evaluate whether the existing turbulent models could successfully caption the wall temperature variations at supercritical conditions by comparing the numerical results with the experimental data. The turbulent models that have better performance are modified using a variable …
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Numerical study on scaling effects and decoupled network-based simulation of gaseous explosion
… together with chemical reaction and turbulence models are solved for the driver and the blast-wave sections using computational fluid dynamics (CFD) solver <em>ANSYS Fluent</em> (3D-based) and <em>Flowmaster</em> (1D-based) respectively. The three dimensional (3D) and one dimensional (1D) …
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Numerical simulation of fumes evacuation in steelmaking plants
… and steady-state solvers with different turbulent models, namely the standard k-e and the Large Eddy Simulation models. The results revealed that steady-state simulations provide sufficient information for designing and optimizing the geometry of the secondary capture system. The …
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A finite element approach for the implementation of magnetostrictive material terfenol-D in automotive CNG fuel injection actuation
… solver with standard k-ε, realizable k-ε and RSM turbulent models to predict the mass flow rate of CNG to be injected. Eventually, the simulated flow rates were verified against mathematically derived static flow rate required for a standard automotive fuel injector considering standard …
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Turbulence models for the numerical prediction of transitional flows with RANSE
… solvers. In naval architecture, turbulence models are necessary to solve typical hydrodynamic problems both in model scale, where Re=O(106), and in full scale, typically Re=O(108), since direct numerical simulations are not possible in these cases. This thesis aims to study the performance …
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Statistical description of turbulent reacting media
… the interaction of chemistry and turbulence in a turbulent reacting flow. Both self-ignition and flame propagation are studied. For self-ignition study, the combined effects of temperature/concentration inhomogeneities and turbulence were studied numerically. For this purpose two statistic …
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Assessment of FLUENT CFD code as an analysis tool for SCW applications
… are compared with experimental data and 1-D models represented by existing empirical correlations. Analysis of the individual heat-transfer regimes is conducted using an axisymmetric 2-D model of tubes of various lengths and composed of different nodes count along the heated length. Wall …
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Aerodynamic and Aeroacoustic Analysis of Low Reynolds Number Propellers Using Higher-Order RANS Transition Turbulence Modeling
… Capturing these effects in our computational models is necessary to further our understanding of rotor aerodynamics and acoustics. The current study has introduced a novel RANS transition turbulence model, SSG/LRR-$\omega$-$\gamma$, that is capable of modeling different modes of transition …
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Modeling and Simulation of Large Scale Stirred Tank
… mixing process by the construction of numerical models that resemble the geometry of this process. There were seven numerical models constructed to evaluate the DWPF mixing process and four pilot plants. The models were developed with Fluent software and the results from these models were used to …
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Application of chemical kinetic modeling to improve design and performance criteria for a practical incineration system
In this study, detailed thermo-chemical kinetics with networked ideal reactor model were applied to simulate a practical combustion system -the Secondary Combustion Chamber (SCC) of the Rotary Kiln incineration Simulator (RKIS) at the EPA facility at Research Triangle Park, NC. The networked ideal …
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Experimental and numerical studies on oil spilling from damaged oil tankers
… and adopts hydrostatic theories or quasi-steady models with over-simplified assumptions on data analysis or analytical prediction. These conditions or assumptions may not stand in the complex dynamic spilling process in the real spilling accident. This study brings a step further on the knowledge …