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 56 for “"Numerical code"”.
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Optimum Damping of Beam Vibrations Using Piezoceramic Transducers
… shunted with an RL electrical circuit, has been numerically and experimentally investigated, in order to determine the optimal electric tuning parameters for vibration damping. A numerical code based upon Galerkin weighted-residual method is developed and the complete piezo-electro-mechanical …
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Jet quenching in Quark Gluon Plasma: flavor tomography at RHIC and LHC by the CUJET model
A new jet tomographic model and numerical code, CUJET, is developed in this thesis and applied to the phenomenological study of the Quark Gluon Plasma produced in Heavy Ion Collisions.
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Symbolic-numeric programming in scientific computing
… notation, and the ability to express efficient numerical algorithms. To meet these goals simultaneously, languages use imperative surface syntaxes that mimic mathematical notation. However, mimicking does not make them the same—mathematics is declarative, pliable, and caters to exploratory human …
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Experiments and numerical simulations of the dynamics of an R.O.V. thruster during maneuvering
… of maneuvering thrusters were explored through numerical simulation and experiments. Vortex lattice propeller code developed for use with nonuniform inflow was adapted to incorporate varying propeller speed and inflow velocity. Test runs were made using a three bladed propeller. Experiments were …
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Development & Validation of the Acoustic Analogy Code for Jet Noise Predictions
<p>In this thesis, the numerical code for predicting the far-field sound radiated from a localized sound source is developed based on Lighthill's acoustic analogy theory. The acoustic analogy equation allows calculating the sound intensity in terms of the integral over the volume with distributed …
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Problem solving environments for the numerical solution of partial differential equations
The complexity and sophistication of numerical codes for the simulation of complex problems modelled by partial differential equations (PDEs) has increased greatly over the last decade. This makes it difficult for those without direct knowledge of the PDE software to employ it efficiently. Problem …
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Experimental and numerical study of the bleed effect on the propagation of strong plane and converging cylindrical shock waves
A combined experimental-numerical study was conducted to determine the effect of bleeding on the propagation of plane and converging cylindrical shock waves. A fully 3-D Finite Element code was written for simulating inviscid unsteady flow in various cases of shock tube geometry. The scheme used …
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General relativistic magnetohydrodynamic simulations of binary neutron star mergers
… merger (BNS) simulations, conducted by using the numerical code "Whisky" under various conditions, such as, different Equation of State (EOS) for neutron matter (APR4, Ideal fluid and H4 EOSs), masses (with equal/unequal masses for two neutron stars), different magnetic field configurations (both …
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Numerical study of two-dimensional smart structures
In this thesis we use a new numerical code, based upon a mixed FEM-Runge-Kutta method, for the analysis and the design of plane 2-dimensional smart structures. We applied the developed code to the study of arbitrarily shaped piezo-electromechanical (PEM) plates. This code is based on a weak …
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Coherence Effects and Spin Polarisation of Electrons in Electromagnetic Fields
… in particle physics. Our aim is to create a numerical code capable of modelling electron spin precession, while also predicting the spectrum and angular distribution of energy emitted from an arbitrary number of relativistic electrons, interacting with an external field in the domain of …
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An Experimental Investigation of Critical Heat Flux Performance of Hypervapotron in Subcooled Boiling
… structure on the heating surface. Finally, a numerical code was successfully developed to give CHF predictions for hypervapotron configurations. The simulation indicates that the better performance of CHF in hypervapotron configurations is a result of high conductivity material with augmented …
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Effects of wind turbine rotor positioning on tornado induced loads
… Subsequently, experimental validation of the numerical code HIW-TUR was conducted by evaluating the induced moments for various yaw and pitch angles. The experimental results demonstrated that the bending moment was the most important in terms of magnitude and variation with respect to the …
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Mooring lines analysis and design for wave energy converters
… moored system. All commercial software and codes available are in fact developed by having in mind different mooring requirements.;Through this project, opportunities to improve entire moored system design were investigated. This study aimed to consider the potential option of designing …
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Single-crystal plasticity at finite strains: a computational investigation of hardening relations
… The first is to develop and implement a numerical algorithm to solve the system of equations that describe single-crystal viscoplasticity under finite strains. The second objective is to use the computer code that is developed to examine three hardening laws that have been proposed. The …
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Electron Bernstein wave current drive modeling in toroidal plasma confinement
… deposition profile are calculated using the numerical code DKE, which solve the drift-kinetic equation. Two scenarios for EBWCD are identified. The first scenario consists of approaching a harmonic of the EC resonance from a lower B-field region and drives current in the plasma core using the …
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Mesoscale circulation in the Black Sea : a study combining numerical modelling and observations
… in the Black Sea basin by combining hydrodynamic numerical modelling with observational data analysis. Within this research: i) A folly working eddy resolving Black Sea model was set up using the POLCOMS 3-D numerical code, ii) The mesoscale circulation in the Black Sea during October-November …
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Nonlinear evolution of Vlasov equilibria
In this work, we investigate numerically the evolution of perturbed Vlasov equilibria. according to the full nonlinear system with particular emphasis on analyzing the asymptotic states towards which the system evolves. The simulations are carried out with the numerical code that we have …
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A 3-dimensional finite element method for groundwater flow and containment transport
A code was written to model groundwater flow and to solve for contaminant transport in variably saturated porous media using the Finite element method. The numerical code was written in FORTRAN 77. The GWGRID program was used for mesh generation. This numerical model was applied to two nuclear …
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Development of rate-dependent thermoplastic constitutive models for numerical analysis of ceramics at high-temperature
… materials are developed, implemented into a numerical code, calibrated on experimental data, and validated. - The first model is elastic-plastic and addresses the cold compaction of ceramic powders, combining nonlinear elasticity, elasto-plastic coupling and increase of cohesion. - The second …
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Protostar Formation in Magnetic Clouds: The Phase Beyond Ion Detachment
… equations, which we solve using an adaptive-grid numerical code. In the central part of the core, an opaque region forms above a certain density, where isothermality breaks down. We treat this region using the adiabatic approximation, while the density at which the transition occurs is treated as …
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