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 1118 for “"Numerical results"”.
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Theoretical and numerical results for electrorheological fluids
This thesis is about the mathematical background of the behaviour of electrorheological fluids. Those fluids have a special property: When disposed to an electro-magnetic field their viscosity undergoes a significant change. The thesis covers the natural energy spaces (generalized Orlicz spaces), …
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Comparison of exact and numerical results in theXY model
Es wurden neuerdings exakte Formeln für die Berechnung der Energieniveaus des sine-Gordon-Modells (im endlichen Volumen) vorgestellt. Die Herleitung der Resultate ist mathematisch nicht ganz rigoros, weshalb eine numerische Überprüfung wünschenswert ist. Simuliert wird das XY-Modell in zwei …
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Multiphase Flow in Explosive Volcanic Eruptions: Field and Numerical Results
… applications. Here, we present multifield numerical modeling results of mono- and polydisperse impinging jets with length scales and physical parameters relevant to large explosive volcanic eruptions. Our modeling shows that particle behavior is sensitive to whether a jet is monodisperse or …
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An examination of plasma contactor performance through a comparison of theory, numerical results, and data
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1989.
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The effect of welding on the buckling behaviour of spherical shells : a review and some numerical results
The purpose of this thesis is to give first a brief review in the area of shell stability with special focus on the effect of imperfections due to the welding process on the buckling behaviour of shell structures.
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A biblical analysis of Donald A. McGavran's harvest theology principle
… faithfulness in the evangelistic task and actual numerical church growth. Chapter 1 introduces the problem and outlines the research method. Chapter 2 contains a detailed explanation of harvest theology as presented by McGavran in his published works. The chapter outlines the concept of harvest …
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Dielectric Resonator Antennas : theory and design
… focus on the physical interpretation of the numerical results is presented alongside theoretical models. I have used the physical interpretation of the numerical results to lay down some important design rules. A few new inventions associated with the DRA are also included. These are the …
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Topics on option valuation and model calibration
This dissertation is devoted to high performance numerical methods for option valuation and model calibration in L´evy process and stochastic volatility models. In the first part, a numerical scheme for simulating from an analytic characteristic function is developed. Theoretically, error bounds …
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Thermoelectric Magnetohydrodynamic Flows During Various Crystal Growth Processes With an Externally Applied Magnetic Field
… helps produce uniform and homogeneous crystals. Numerical results are presented for Bridgman and float zone processes with strong fields. The azimuthal motion dominates the melt motion. As the magnetic field strength is increased from zero to large values, the azimuthal and meridional motions …
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Comportamento hidrodinâmico de quebra-mares flutuantes
… formulates an integral equation which is solved numerically. Our goal is to obtain the most important parameters in the analysis of a wavebreaker, that are the transmission coefficient, the hydrodynamic loads and the motions of the body. The numerical results for the transmission coefficient and …
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Análise estática de placas pelo método combinado elementos finitos - matriz de transferência
… method are developed for plate bending and some numerical results of the problem are presented. A code for 8 bit microcomputer was developed. Using double precision for the computer variables, the numerical results of the present formulation agree with those obtained by the finite element method. …
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Finite element approximations of Burgers' equation
This work is a numerical study of Burgers' equation with Neumann boundary conditions. The goal is to determine the long term behavior of solutions. We develop and test two separate finite element and Galerkin schemes and then use those schemes to compute the response to various initial conditions …
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Interval method for special constrained global optimization problems
… dominant variable in the tree data structure. Numerical results are illustrated to show the effectiveness in Chapter 3. b). Affine arithmetic is proposed to reduce the approximations' error and can be applied to linearize the given function and also applied in dealing with linear constraints. …
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Analysis of metal matrix composite structures using a micromechanical constitutive theory
… element method. · Computational aspects of the numerical solution, such as the temporal integration of the inelastic strains and the spatial integration of bending moments are addressed. Numerical results are presented which illustrate the nonlinear response of metal matrix composites subjected …
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The application of high order finite difference methods to the diffusion-convection equation
… fluid in a porous medium is approximated numerically with high order finite difference methods using five adjacent space node points by the Crank - Nicolson formulation. This method is referred to as the 5PFDM. It has fourth order correctness in space truncation error and shows good …
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Approximation and Control of the Boussinesq Equations with Application to Control of Energy Efficient Building Systems
In this thesis we present theoretical and numerical results for a feedback control problem defined by a thermal fluid. The problem is motivated by recent interest in designing and controlling energy efficient building systems. In particular, we show that it is possible to locally exponentially …
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Mathematical modelling of unsteady problems in thin aerofoil theory
… of the equation is presented and the subsequent numerical results are analysed. The model is then revised to account for the retraction of the ice layer away from the slot. An asymptotic result for the thin ice layers is also presented.<br/><br/>The problem of describing the motion of a thin, …
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Field Observations and Numerical Simulations of Groundwater Dynamics Within Cabretta Island, A Georgia Barrier Island
… to rapid population growth. I present field and numerical results that 1) provide a better understanding of groundwater dynamics during calm weather periods, and 2) investigate the impacts of high energy storms on groundwater properties within Cabretta Island, a barrier island in Georgia. Field …
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Numerical Simulation of Red Blood Cells in Capillaries
… We validate the methodology by comparing the numerical results of neutrally buoyant particle with the Jeffery's solutions. Numerical results with Stokes equations are compared with numerical results with Navier-Stokes equations. With Stokes equations, the motion of compound vesicle is …
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Acoustic propagation in nonuniform circular ducts carrying near sonic mean flows
… and the round-off error encountered in purely numerical techniques. The influence of the throat Mach number, frequency, boundary-layer thickness and liner admittance on both upstream and downstream propagation of acoustic modes is considered. A numerical procedure, which is stable for cases of …
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