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 26 for “"FVM"”.
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Post-Synthetic Chemical and Morphological Modifications of Polymer Membranes for Gas Separations
… applications. Free volume manipulation (FVM) is an innovative post-synthetic modification approach designed to address the permeability–selectivity tradeoff of polymer membranes. This method involves protection/deprotection chemistries of labile functional groups, such as a …
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Solving The Prandtl Boundary Layer Equation in Fluid Dynamics Via Non-Linear Numerical Optimization
<p>The Finite Volume Method (FVM) is often applied to solve the non-linear Navier-Stokes differential equations. One of the main disadvantages of this method is that it requires a very fine mesh and a very large number of iterations for reasonable numerical solutions. In this research, a different …
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Sarcopenia na doença pulmonar obstrutiva crônica
… de fraturas vertebrais morfométricas (FVM), pré-sarcopenia e sarcopenia com os critérios de gravidade e prognóstico de pacientes com DPOC e comparou os resultados com dois grupos controles, além de comparar 4 critérios diagnósticos (Baumgartner, Newman, Misto e FNIH) de pré-sarcopenia e …
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Analysis of Solute Mixing at the Pore-Scale Using Micromodels and Lattice -Boltzmann Finite Volume Modeling
… lattice-Boltzmann (LB) finite volume model (FVM) utilizing identical pore structures and flow rates. The LB method is used to solve for interstitial pore velocities. Reactive transport is simulated by combining pore velocities from the LB model with a reactive transport FVM model. Pore scale …
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Predicting Language Impairment Status: A Risk Factor Model
… of tense and agreement morpheme use (SPELT-FVM classification), thereby limiting the clinical sample to children with specific deficits in grammatical morphology. Step-wise logistic regression and five-fold cross-validation were used to derive risk factor models, probability equations, and …
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Performance Analysis of a Coaxial Helicopter in Hover and Forward Flight
… rotor wakes by using a free-vortex methodology (FVM). The FVM is a Lagrangian-based wake convection methodology, which solves for the evolution of the vortical wake produced by the rotor blades under the influence of an external flow. The extent to which the two rotors interact with each other was …
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Finite element analysis of flows in secondary settling tanks
… to realise an unstructured grid within the FVM, the power of the finite element method (FEM) lies in its higher flexibility in fitting irregular domains and in providing local grid refinement. Generally, unstructured mesh procedures with the FVM require essential, additional orthogonality …
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The role of the immune system in Parkinson’s Disease: from neuropathology to treatment.
… than previously used foetal ventral midbrain (fVM) tissue, which provided proof of principle for the replacement of DAn in PD but was associated with ethical and logistical issues. Work using the hESC-derived NPCs has now matured into early clinical trials (including STEM-PD, a collaboration …
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Computational fluid dynamics modelling of fluid flow inside fractured reservoirs.
… Computational Fluid Dynamic ANSYS CFD Fluent FVM to investigate fluid flow in many kinds of fractured media. These investigations ranged from simple and widely used fractured geometries to more complex ones. The research began with parallel plates fractures and rough fractures with horizontal …
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Modelling and computational analysis of heat-transfer in multi-geometry and multi-phase flow of Newtonian and non-Newtonian fluids in pipes and channels
… problems are based on the Finite Volume Methods (FVM) implemented on the OpenFOAM software. The numerical instabilities due to the High Weissenburg Number Problem (HWNP) are resolved by employing either the Discrete Elastic Viscous Stress Splitting (DEVSS) or the Log Conformation Reformulation …
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Numerical Study of Energy Loss Mechanisms in Oscillating Underwater Explosion (UNDEX) Bubbles
… the model in an Finite Volume Method (FVM) Eulerian-based hydrocode is provided. Through this research this thesis aims to improve long-term UNDEX bubble behavior prediction. Which is apart of a larger effort to improve numerical and computational predictions of UNDEX-induced structural …
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Model Updating Using a Quadratic Form
… Method (QCM) and the Full Vector Method (FVM), are described in this paper. It is shown that the QCM possesses superior robustness properties with respect to noise in the data. This fact, as well as the simplicity offered by QCM, is demonstrated theoretically and experimentally. The …
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Numerical Models for Scour and Liquefaction Around Object Under Currents and Waves
… equation using a finite volume method (FVM). The coupling between water wave and sea bed is through both pressure and stress conditions on common boundaries. For residual liquefaction, the solutions to the one-dimensional model equation of the period-averaged pore pressure buildup are …
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Additive and subtractive laser-pulsed nano/micro machining of metal alloys for enhanced material properties, and numerical validation
… the difference and similarities between them. An FVM (Finite Volume Method) TruFlow™ model was developed in Flow 3D™ to analyze and compare the thermally induced surface microstructural changes with the experimentally observed results. The experimental, analytical and numerical analyses show very …
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Effect of gap lenghts of sphere-sphere electrodes on air breakdown level under lightning impulse
… were solved by means of a finite volume method (FVM). This study covers the effect of different Reynolds numbers (ReD) on average Nusselt numbers (Nuavg) and local Nusselt numbers (NuD). From the result, the average Nusselt numbers (Nuavg) increased with the increase of Reynolds numbers (ReD) for …
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Numerical study of jet impingement cooling on a smooth curve surface
… were solved by means of a finite volume method (FVM). This study covers the effect of different Reynolds numbers (ReD) on average Nusselt numbers (Nuavg) and local Nusselt numbers (NuD). From the result, the average Nusselt numbers (Nuavg) increased with the increase of Reynolds numbers (ReD) for …
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Wake deceleration of a racecar multielement airfoil in ground effect
… ANSYS Fluent, which is a finite-volume method (FVM) based commercial hybrid-grid Reynolds-averaged Navier-Stokes (RANS) equations solver. Computational results were obtained using a two equation shear stress transport (SST) k–omega model coupled with a one equation intermittency transition model …
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Mesoscopic Numerical Methods for Reactive Flows: Lattice Boltzmann Method and Beyond
… by means of standard Finite Volume Method (FVM). Extensive error analysis and the order of convergence of the scheme are also reported in the thesis. In order to extend the capabilities of LBM and make it more efficient in the simulation of reactive flows, in this thesis a new formulation is …
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High performance computing for multiphase fluid flows
… reconstruction step. The Finite Volume Method (FVM) is utilized, by incorporating a staggered grid, to discretize the two-dimensional (2-D) N-S equations. A preconditioned Krylov-Subspace iterative method, namely, the Bi-Conjugate Gradient Stabilized (Bi-CGSTAB) method is employed to solve the …
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An integrated peridynamics-finite volume based multi-phase flow, geomechanics and hydraulic fracture model
… with the less expensive Finite Volume Method (FVM), following the PD-FEM coupling method proposed by Galvanetto et al. (2016). Significant improvements in computational performance are achieved by the coupled model relative to the pure PD-based model, without compromising the unique original …
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