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Showing 1 to 20 of 52 for “"Method of characteristics"”.
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Transient method of characteristics via the Adiabatic, Theta, and Multigrid Amplitude Function methods
… Theta, and Multigrid Amplitude Function (MAF) methods for solving the Method of Characteristics (MOC) formulation of the time-dependent neutron transport equation. The transient transport versions of the 2D LRA and C5G7 benchmarks were used to assess the performance and accuracy of these …
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Solution of the advection equation using finite difference schemes and the method of characteristics
… tools when considering the prediction of pollution transport in a body of water. Such a prediction is achieved by the solution of the advection-diffusion equation. At present, there exist many numerical techniques which can be used to solve the advection-diffusion equation. The major …
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Full core 3D neutron transport simulation using the method of characteristics with linear sources
The development of high fidelity multi-group neutron transport-based simulation tools for full core Light Water Reactor (LWR) analysis has been a long-standing goal of the reactor physics community. While direct transport simulations have previously been far too computationally expensive, advances …
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Nonlinear Wave Propagation in Helical Springs by the Method of Characteristics and Finite-Element Method
… in DSpace on 2014-12-14T14:42:14Z (GMT). No. of bitstreams: 1 7804159.pdf: 3657121 bytes, checksum: 5824cc2fd849e0047c7f7189a22a5cd3 (MD5) Previous issue date: 1977
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Solution of advection-dominated transport by Eulerian-Lagrangian methods using the backwards method of characteristics
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1987.
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Massively parallel algorithms for method of characteristics neutral particle transport on shared memory computer architectures
… issues. This thesis explores the applicability of shared memory parallel platforms for solving deterministic neutron transport problems. A 2D method of characteristics code - OpenMOC - has been developed with solvers for shared memory multi-core platforms as well as GPUs. The multi-threading and …
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Parallel, asynchronous ray-tracing for scalable, 3D, full-core method of characteristics neutron transport on unstructured mesh
… reactor core simulations is the computation of detailed 3D power distributions that will enable higher confidence in licensing of next-generation reactors and lifetime extensions/power up-rates for current-generation reactors. To date, there have been only a few demonstrations of such …
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Study of Three-Dimensional Supersonic Flow Problems by a Numerical Methodbased on the Method of Characteristics (Specially Adapted for Use on Highspeed Electronic Digital Computers)
… in DSpace on 2014-12-05T19:15:57Z (GMT). No. of bitstreams: 1 6101673.pdf: 3371314 bytes, checksum: f79eb7f9c8216c29cff662746f23ea6e (MD5) Previous issue date: 1961
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Induced Compton Scattering Effects in Radiation Transport Approximations
In this thesis the method of characteristics is used to solve radiation transport problems with induced Compton scattering effects included.
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The development of a simulation model of pipeline network systems with check valve
The objective of this thesis is to design and implement a software package to model and simulate pipeline network systems with check valves. The application package is written under the window's environment to provide the hydraulic engineer a user friendly interface for ease of simulation and …
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Multiscale simulation of frequency dependent line models and network equivalents
The evaluation of power systems encompasses phenomenon of distinct timeframes and so leads to the adoption of different simulation tools. For instance, fast transients related to switching maneuvers require time-steps of microseconds while slow transients, related to energy exchange between …
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Pulse Propagation in Fluid-Filled Elastic Curved Tubes
The propagation of fluid transients through elbows in pipes is an important consideration in the safety analysis of nuclear piping systems. In this study, one-dimensional governing equations for the propagation of pressure pulses in an inviscid compressible fluid contained in a thin-walled …
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Prandtl-Meyer expansion of ionized argon with differing electron and atom temperatures
The sharp corner expansion of ionized argon with differing electron and atom temperatures has been calculated. The thermodynamic equations which apply for a two-temperature gas were derived. An energy balance on the electrons was performed to obtain a functional relationship between Ta, Te, p , and …
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Transient Analysis in Pipe Networks
Power failure of pumps, sudden valve actions, and the operation of automatic control systems are all capable of generating high pressure waves in domestic water supply systems. These transient conditions resulting in high pressures can cause pipe failures by damaging valves and fittings. In this …
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Scale effects in tests on footings
This dissertation presents an investigation of the effects of stress, and of absolute and relative particle size, in tests on vertically loaded footings. Two granular materials, namely, a silica rock flour and a Chatelet flint grit, which differed in nominal diameter by a factor of 50 but were …
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Basic relation for the recovery of oil by steam application to an oil and hot water system
A system of equations describing the general behavior of a "steam flood" or oil displacement by means of steam in a homogeneous, one-dimensional non-capillary model formation is here derived. An aspect of the steam flood is the displacement of oil by hot water after the steam has condensed. An …
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Modeling and simulation of The Transient Reactor Test Facility using modern neutron transport methods
… Test Facility (TREAT) has regained the interest of the nuclear engineering community in recent years. While TREAT's design makes it uniquely suited to transient fuel testing, it also makes the reactor very challenging to model and simulate. In this thesis, we build a Monte Carlo model of TREAT's …
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Análise de transientes hidráulicos em oleodutos
In order to ensure that the piping and equipment of oil pipelines are not exposed to inadmissible pressures it is necessary to analyse hydraulic transients. The present work presents a computer program (TRANSH), developed by the author for calculating the hydraulic transients relevant to oil …
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Evaluation of a displacement-body model for hypersonic shock-wave/boundary-layer interaction
… body with constant surface pressure, the value of which is set equal to the value of plateau pressure given by free-interaction theory. A shock-fitting method of characteristics is employed to numerically compute quantities in the inviscid outer flow. Boundary conditions that satisfy physical …
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Mathematical Modeling of Perifusion Cell Culture Experiments
… and analyze a mathematical model consisting of coupled partial differential equations describing the intracellular signaling and the movement of substances in the cell chamber. We analyze three different data sets and give cellular mechanisms that explain the data. Our model indicates that …
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