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 59 for “"Numerical framework"”.
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Numerical Framework for Simulating Multiphase Flows with Phase Change
… dissertation demonstrates a computational framework for simulating such a vaporizing flow. The framework is built from the ground up starting from the laws of conservation of mass, momentum, and energy combined with the relevant thermodynamic relations. The framework discussed in this work …
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Theoretical and numerical framework for extrusion-based additive manufacturing applications
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-03-28 without embargo terms
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A numerical framework for the direct simulation of solid-fluid systems
… high costs and limited resolution. One promising numerical alternative is to simulate solid-fluid systems at the grain-scale, fully resolving the interaction of individual solid particles with other solid particles and the surrounding fluid. Until recently, the direct simulation of these systems …
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Numerical Framework for Mechanical Response of Composite Metal Foam under Various Conditions.
North Carolina State University Theses Mechanical and Aerospace Engineering.
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A Study of Solidification With a Rotating Magnetic Field
We then simulate the experiments using the numerical model. The numerical model predicts macrosegregation effects similar to those observed in the experiments. The temperature traces obtained from experiments and predicted by the numerical calculations also agree very well. We extend the numerical …
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Development of an OpenFOAM Solver for Hydroacoustic Simulations: An Application for Acoustic Fish Deterrence
… River Basin. It leverages an established numerical framework (OpenFOAM) and deals with understanding how to model the system. The study prioritizes enhancing the accuracy of the methods developed and ways to improve its computational efficiency.
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Characterization and mitigation of blade waviness effects on fan performance
… for laminar-turbulent transition are assessed numerically and experimentally over relevant range of aerodynamic and geometric parameters. The governing mechanism (natural transition triggered by receptivity amplification from surface waviness) is explained based on a newly established numerical …
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Computational fluid dynamics (CFD) modelling of critical velocity for sand transport flow regimes in multiphase pipe bends.
… turbulence structure. The developed CFD numerical framework has been verified for the relevant forces and all the possible interaction mechanisms of the liquid-solids multiphase flow by investigating four different numerical frameworks, in order to determine the optimum numerical …
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Meshless methods: theory and application in 3D fracture modelling with level sets
… currently unsatisfactory. In this thesis, novel numerical techniques are developed which solve many of these problems. This thesis consists two major parts: firstly an investigation into the theory of meshless methods and secondly an innovative numerical framework for 3D fracture modelling using …
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A numerical study of Witsenhausen's Counterexample
… Using finite element (FE) analysis, we develop a numerical framework to study this integral equation and understand the structure of optimal controllers. We then solve the integral equation as a mathematical optimization and use our FE model to numerically compute a nonlinear controller that …
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An adaptive space-time discontinuous Galerkin method for reservoir flows
Numerical simulation has become a vital tool for predicting engineering quantities of interest in reservoir flows. However, the general lack of autonomy and reliability prevents most numerical methods from being used to their full potential in engineering analysis. This thesis presents work towards …
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Micromechanical Behavior of Fiber-Reinforced Composites using Finite Element Simulation and Deep Learning
… polymer (CFRP) composites through high-fidelity numerical simulations. We investigated multiple transverse cracking of cross-ply CFRP laminates on the microstructure level through simulating large numerical models. Such an investigation demands an efficient numerical framework along with …
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Parametric Studies Based Mechanical and Thermal Modelling of Spot Welded Joints
… work has focused on formulating a experimental/numerical framework for the investigation of spot weld properties and performance. An Inverse temperature measurement approach has been established to predict the thermal history of a spot welded joints using remote thermocouples. This method …
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Evaluation of Steel H-Piles with Localized Corrosion and Rehabilitation Using Friction-Type Bolted Steel Plates
… but localized corrosion: (1) development of a numerical framework to predict the axial capacity of the corroded piles, and (2) development and evaluation of a friction-type bolted steel plate-based rehabilitation system to be used for the repair of corroded piles. To accomplish the first …
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Numerical and Theoretical Developments for Coherent Structures
… to the maturation of this theory and its numerical implementations by providing an efficient and user-friendly software package for these tools, demonstrating the usefulness of these methods on a large-scale transport application, further extending the theory in a specific context, and …
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Static and Dynamic Optimisation of Fluid-Filled Lattices for Responsive Orthotic Insoles
… lattices are examined with experimental and numerical analyses with particular focus on the influence of geometric parameters on compressive behaviour. The behaviour of fluid flow within the lattice and the influence of different geometric parameters is also characterised to evaluate …
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Field ionization from carbon nanofibers
… of Argon from multi-walled CNTs and provide a numerical framework for analyzing the generated ion currents in cases where the surface electric fields are low.
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The Interaction of a Transient Forward Axial Disturbance Flow With a Rotor
… air mobility (UAM). Utilizing a high-fidelity numerical simulation approach that combines Large-Eddy Simulation (LES) and Unsteady Reynolds-Averaged Navier-Stokes (URANS) models, the study effectively captures the complex aerodynamic and acoustic interactions inherent in rotor operations. …
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Wear modeling with sensitivity to lubricant chemistry
… of this research is to develop a theoretical and numerical framework for modeling the formation and evolution of ZDDP antiwear films based on the relevant chemical pathways and physical mechanisms at work. The ability to predict the development and function of thin solid films on rough surfaces …
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