Browsing by Author "Guermond, Jean-Luc"
Now showing items 1-20 of 68
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A Generalized Multigroup Method
Till, Andrew Thomas (2014-04-29)The standard multigroup (MG) method for energy discretization of the transport equation can be sensitive to approximation in the weighting spectrum chosen for cross-section averaging. As a result, MG often inaccurately ... -
A Least-Squares Transport Equation Compatible with Voids
Hansen, Jon (2014-04-22)Standard second-order self-adjoint forms of the transport equation, such as the even-parity, odd-parity, and self-adjoint angular flux equation, cannot be used in voids. Perhaps more importantly, they experience numerical ... -
A Second Order Linear Discontinuous Cut-Cell Discretization for the SN Equations in RZ Geometry
Reed, Michael Shane (2015-05-04)In this dissertation we detail the development, implementation, and testing of a new cut-cell discretization for the discrete ordinates form of the neutron transport equation. This method provides an alternative to ... -
Adjoint-Based Uncertainty Quantification for Neutron Transport Calculations
Bruss, Donald Eugene (2016-07-28)The accurate modeling of complex physical phenomena, such as radiation transport in a laboratory experiment or a nuclear reactor, challenges the limits of modern computing resources and helps drive the requirement for ... -
An Energy Formulation of Surface Tension or Willmore Force For Two-Phase Flow
Patty, Spencer (2017-07-12)The motion of a biological cell in liquid is a rich subject for modeling. In the early 1970’s, it was realized by Canham that biological vesicles with lipid bilayer membranes reach a steady state shape that minimizes ... -
Analysis of a PML method applied to computation to resonances in open systems and acoustic scattering problems
Kim, Seungil (2010-01-14)We consider computation of resonances in open systems and acoustic scattering problems. These problems are posed on an unbounded domain and domain truncation is required for the numerical computation. In this paper, a ... -
Application of L1 Minimization Technique to Image Super-Resolution and Surface Reconstruction
Talavatifard, Habiballah (2013-05-06)A surface reconstruction and image enhancement non-linear finite element technique based on minimization of L1 norm of the total variation of the gradient is introduced. Since minimization in the L1 norm is computationally ... -
Application of the Entropy Viscosity Method and the Flux-Corrected Transport Algorithm to Scalar Transport Equations and the Shallow Water Equations
Hansel, Joshua Edmund (2016-07-22)The Flux-Corrected Transport (FCT) algorithm, in conjunction with the entropy viscosity method, was applied with the continuous finite element method to (a) a scalar transport equation that includes reaction and source ... -
Approximation Techniques for Incompressible Flows with Heterogeneous Properties
Salgado Gonzalez, Abner Jonatan (2011-10-21)We study approximation techniques for incompressible flows with heterogeneous properties. Speci cally, we study two types of phenomena. The first is the flow of a viscous incompressible fluid through a rigid porous ... -
Asymptotic Analysis of Upwind Discontinuous Galerkin Approximation of the Radiative Transport Equation in the Diffusive Limit
Guermond, Jean-Luc; Kanschat, Guido (SIAM Journal on Numerical Analysis, 2010) -
Bayesian network analysis of nuclear acquisitions
Freeman, Corey Ross (2009-05-15)Nuclear weapons proliferation produces a vehement global safety and security concern. Perhaps most threatening is the scenario of a rogue nation or a terrorist organization acquiring nuclear weapons where the conventional ... -
Canonical Models of Geophysical and Astrophysical Flows: Turbulent Convection Experiments in Liquid Metals
Ribeiro, Adolfo; Fabre, Guillaume; Guermond, Jean-Luc; Aurnou, Jonathan (Metals, 2015) -
CFD Simulation of Riser VIV
Huang, Zhiming (2012-07-16)The dissertation presents a CFD approach for 3D simulation of long risers. Long riser VIV simulation is at the frontier of the CFD research area due to its high demand on computational resources and techniques. It also has ... -
Compressibility Effects on the Kelvin-Helmholtz Instability and Mixing Layer Flows
Karimi, Mona (2015-06-05)The objective of the thesis is to analyze, understand and explicate the various physical mechanisms underlying the suppression of instability and mixing in compressible mixing layers. The investigation comprises of three ... -
Continuous Finite Element Approximation of Hyperbolic Systems
Yang, Yong (2016-06-13)The main purpose of this work is to study continuous finite element methods for hyperbolic problems. In scalar case, it is shown that using consistent mass matrix is not compatible with the maximum principle. Moreover, we ... -
Coupled Dynamic Analysis of Large-Scale Mono-Column Offshore Wind Turbine with a Single Tether Hinged in Seabed
Chen, Jieyan (2012-10-19)The increased interest in the offshore wind resource in both industry and academic and the extension of the wind field where offshore wind turbine can be deployed has stimulated quite a number of offshore wind turbines ... -
Damping Seismic Waves Using Electro-Rheological Dampers
Gomez Constante, Angel Roberto (2016-05-03)The recent seismic scale that the world has been experiencing, with earthquakes of uncommon intensity has triggered the alarms of the world scientific community due to the devastating aftermaths in terms of infrastructure ... -
Delayed neutrons from the neutron irradiation of ²³⁵U
Heinrich, Aaron David (Texas A&M University, 2008-10-10)A series of experiments was performed with the Texas A&M University Nuclear Science Center Reactor (NSCR) to verify ²³⁵U delayed neutron emission rates. A custom device was created to accurately measure a sample's pneumatic ... -
Development of an Ultra-High Efficiency Gas Turbine Engine (UHEGT) with Stator Internal Combustion: Design, Off-Design, and Nonlinear Dynamic Operation
Ghoreyshi, Seyedmostafa (2018-08-22)An Ultra-High Efficiency Gas Turbine (UHEGT) technology is developed in this study. In UHEGT, the combustion process is no longer contained in isolation between the compressor and turbine, rather distributed in multiple ... -
Discontinuous Galerkin Finite Element Method for the Nonlinear Hyperbolic Problems with Entropy-Based Artificial Viscosity Stabilization
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 ...