Browsing Electronic Theses, Dissertations, and Records of Study (2002– ) by Author "Ragusa, Jean C."
Now showing items 1-18 of 18
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Jarrell, Joshua (2012-02-14)In this dissertation, we discuss an adaptive angular discretization scheme for the neutral-particle transport equation in three dimensions. We mesh the direction domain by dividing the faces of a regular octahedron into ...
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Wang, Yaqi (2010-01-16)In this dissertation, we develop Adaptive Mesh Refinement (AMR) techniques for the steady-state multigroup SN neutron transport equation using a higher-order Discontinuous Galerkin Finite Element Method (DGFEM). We propose ...
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Wu, Zeyun (2011-02-22)The purpose of the inverse-transport problems that we address is to reconstruct the material distribution inside an unknown object undergoing a nondestructive evaluation. We assume that the object is subjected to incident ...
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Sternat, Matthew Ryan (2011-02-22)The problem of inferring or reconstructing the material properties (cross sections) of a domain through noninvasive techniques, methods using only input and output at the domain boundary, is attempted using the governing ...
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Webster, Jennifer B (2013-07-09)Classification problems arise in so many different parts of life – from sorting machine parts to diagnosing a disease. Humans make these classifications utilizing vast amounts of data, filtering observations for useful ...
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Kyriakopoulos, Vasileios (2022-05-25)This work details the development of a novel subchannel code within the MOOSE computational framework. MOOSE is a Multi-physics Object Oriented Simulation Environment, a parallel computational framework targeted at the ...
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Zingan, Valentin Nikolaevich (2012-07-16)This work develops a discontinuous Galerkin finite element discretization of non- linear hyperbolic conservation equations with efficient and robust high order stabilization built on an entropy-based artificial viscosity ...
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Zhu, Lei (2009-05-15)In this thesis, we develop and test a fundamentally new linear-discontinuous least-squares (LDLS) method for spatial discretization of the one-dimensional (1-D) discrete-ordinates (SN) equations. This new scheme is based ...
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Bruss, Donald (2012-07-16)Preconditioners based upon sweeps and diffusion-synthetic acceleration (DSA) have been constructed and applied to the zeroth and first spatial moments of the 1-D transport equation using SN angular discretization and a ...
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Mahadevan, Vijay Subramaniam (2011-10-21)The modeling of nuclear reactors involves the solution of a multi-physics problem with widely varying time and length scales. This translates mathematically to solving a system of coupled, non-linear, and stiff partial ...
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Wang, Yaqi (Texas A&M University, 2007-04-25)In this work, we propose, implement and test two fully automated mesh adaptation methods for 1-D multigroup eigenproblems. The first method is the standard hp-adaptive refinement strategy and the second technique is a ...
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Fredette, Nathaniel (2012-02-14)This thesis explores the inverse problem of optical tomography applied to two-dimensional heterogeneous domains. The neutral particle transport equation was used as the forward model to simulate how neutral particles stream ...
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Kumar, Akansha (2016-12-08)The optimization of a complex system involves the determination of optimum values for a set of design parameters. The optimization search happens in order to meet a specific set of objectives concerning the quantities of ...
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Maslowski Olivares, Alexander Enrique (2009-05-15)We present a new iterative approach to solving neutral-particle transport problems. The scheme divides the transport solution into its particular and homogeneous or “source-free” components. The particular problem is solved ...
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Maginot, Peter Gregory (2012-02-14)Linear discontinuous (LD) spatial discretization of the transport operator can generate negative angular flux solutions. In slab geometry, negativities are limited to optically thick cells. However, in multi-dimension ...
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Delchini, Marc Olivier (2011-08-08)In this study, the impact of various flow models is assessed under free and forced convection: compressible versus incompressible models for a Pressurized Water Reactor, and Darcy's law vs full momentum equation for High ...
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Rogers, Timothy James (2009-05-15)Optimization methods have been developed and refined throughout many scientific fields of study. This work utilizes one such developed technique of optimization called simulated annealing to produce optimal operation ...
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Zhang, Yunhuang (2011-02-22)The accumulation of spent nuclear fuel may be hindering the expansion of nuclear electricity production. However, the reprocessing and recycling of spent fuel may reduce its volume and environmental burden. Although fast ...