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Filtering by: Committee Member Showalter, Ralph E Remove constraint Committee Member: Showalter, Ralph E Decade 2010-2019 Remove constraint Decade: 2010-2019

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  • On existence and uniqueness of weak solutions to the Navier-Stokes equations in R3

    Creator:
    Peterson, Samuel H.
    Abstract:
    This thesis is on the existence and uniqueness of weak solutions to the Navier-Stokes equations in R3 which govern the velocity of incompressible fluid with viscosity ν. The solution is obtained in the space of tempered distributions on R3 given an initial condition and forcing data which are dominated by...
    Resource Type:
    Masters Thesis
    Full Text:
    : _______________________________________________ Mina E. Ossiander This thesis is on the existence and uniqueness of weak solutions

  • Modeling Flow and Transport at Pore Scale with Obstructions

    Creator:
    Umhoefer, Joseph G.
    Abstract:
    In this thesis we study mathematical and computational models for phenomena of flow and transport in porous media in the presence of changing pore scale geometries. The differential equations for the flow and transport models at Darcy scale involve the coefficients of permeability, porosity, and tortuosity which depend on the...
    Resource Type:
    Dissertation
    Full Text:
    also like to thank my committee members, Dr. Robert Higdon, Dr. Adel Faridani, Dr. Ralph Showalter

  • Interpolation Schemes for Two Dimensional Flow with Applications

    Creator:
    Umhoefer, Joseph G.
    Abstract:
    In this thesis we study a numerical analysis problem motivated by the need to simulate an event such as an oil spill in a deep water environment. Numerical simulation can help to mitigate the disastrous effects of such events by aiding the management of risk assessment and recovery efforts. However,...
    Resource Type:
    Masters Thesis

  • Stochastic analysis of flow and transport in porous media

    Creator:
    Vasylkivska, Veronika S.
    Abstract:
    Random fields are frequently used in computational simulations of real-life processes. In particular, in this work they are used in modeling of flow and transport in porous media. Porous media as they arise in geological formations are intrinsically deterministic but there is significant uncertainty involved in determination of their properties...
    Resource Type:
    Dissertation
    Full Text:
    discuss without her enthusiastic attitude toward research. Second, I would like to thank Dr. Ralph E

  • An investigation of transition from penetration to deflection in the fracture of bi-material interfaces

    Creator:
    Strom, Joshua L.
    Abstract:
    The problem of determining whether a crack impinging on an interface will penetrate into the substrate or deflect along the interface is vital to the effective design of layered and composite material systems. Of particular interest is the transition between crack propagation by penetration through an interface and deflection along...
    Resource Type:
    Masters Thesis
    Full Text:
    . 0.0 0.5 1.0 1.5 2.0 2.5 1 10 100 N o rm al iz e d F ra ct u re L o ad

  • 3D cone beam reconstruction formulas for the transverse-ray transform with source points on a curve

    Creator:
    Wongsason, Patcharee
    Abstract:
    3D vector tomography has been explored and results have been achieved in the last few decades. Among these was a reconstruction formula for the solenoidal part of a vector field from its Doppler transform with sources on a curve. The Doppler transform of a vector field is the line integral...
    Resource Type:
    Dissertation
    Full Text:
    T f(a, θ) = ∫ ∞ 0 (θ × f)(a+ tθ)dt. (1.3) This transform has the property: T f(a, θ)× θ = Eθ

  • Mathematical treatment and simulation of methane hydrates and adsorption models

    Creator:
    Medina, Francis Patricia
    Abstract:
    In this dissertation we develop mathematical treatment for two important applications: (i) evolution of methane in coalbeds with the associated phenomena of adsorption, and (ii) formation of methane hydrates in seabed. We use simplified models for (i) and (ii) since we are more interested in qualitative properties of the solutions...
    Resource Type:
    Dissertation
    Full Text:
    Peszynska and Dr. Ralph Showalter for sharing their expertise with me while working in the project related

  • On Undular Bores and Solitary Waves in Variable Depth

    Creator:
    Knowles, Jeffrey N.
    Abstract:
    Numerical results are presented using a higher-order pseudo-spectral method in order to solve the Zakharov-Craig-Sulem formulation of the Euler model. We study the effects of variable bathymetry on weakly-dispersive, weakly-nonlinear, shallow water waves. Improved predictions on wave amplitude and shoaling behavior are developed by analytical means in the context of...
    Resource Type:
    Dissertation
    Full Text:
    committee members Dr. Jonathan Istok, Dr. Juan Restrepo, Dr. Eugene Zhang, Dr. Solomon Yim, Dr. Ralph

  • The Stokes problem of fluid mechanics, Riesz transform, and the Helmholtz-Hodge decomposition : probabilistic methods and their representations

    Creator:
    Kim, HoeWoon
    Abstract:
    The flow of incompressible, viscous fluids in R³ is governed by the non-linear Navier-Stokes equations. Two common linearizations of the Navier-Stokes equations, the Stokes equations and the Oseen equations, are studied in this thesis using probabilistic methods. The incompressibility condition presents new challenges for the well known theory relating partial...
    Resource Type:
    Dissertation
    Full Text:
    committee members, Ed Waymire, Donald Solmon, Ralph Showalter, and Glenn Evans. Personal I wish to thank

  • A Discourse on the Gauge Integral

    Creator:
    Lilly, Jeremy
    Abstract:
    The gauge integral is a rather obscure object in mathematics. Like the Riemann integral, it is relatively simple to define, but unlike the Riemann integral, the gauge integral has the ability to integrate a very large class of functions. Here, we provide a development of the gauge integral at an...
    Resource Type:
    Honors College Thesis
    Full Text:
    theory, gauge, henstock, integral Corresponding e-mail address: lillyj@oregonstate.edu ©Copyright by