Sökning: "a posteriori error estimate"

Visar resultat 1 - 5 av 21 avhandlingar innehållade orden a posteriori error estimate.

  1. 1. Finite element approximation of the deterministic and the stochastic Cahn-Hilliard equation

    Detta är en avhandling från Göteborg : Chalmers University of Technology

    Författare :Ali Mesforush; Göteborgs universitet.; Gothenburg University.; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; finite element; a priori error estimate; stochastic integral; mild solution; dual weighted residuals; a posteriori error estimate; additive noise; Wiener process; Cahn-Hilliard equation; existence; regularity; Lya- punov functional; stochastic convolution;

    Sammanfattning : This thesis consists of three papers on numerical approximation of the Cahn-Hilliard equation. The main part of the work is concerned with the Cahn-Hilliard equation perturbed by noise, also known as the Cahn-Hilliard-Cook equation. LÄS MER

  2. 2. The Finite Element Method for Fractional Order Viscoelasticity and the Stochastic Wave Equation

    Detta är en avhandling från Göteborg : Chalmers University of Technology and University of Gothenburg

    Författare :Fardin Saedpanah; Göteborgs universitet.; Gothenburg University.; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; finite element method; continuous Galerkin method; linear viscoelasticity; fractional calculus; fractional order viscoelasticity; weakly singular kernel; stability; a priori error estimate; a posteriori error estimate; stochastic wave equation; additive noise; Wiener process; strong convergence.;

    Sammanfattning : This thesis can be considered as two parts. In the first part a hyperbolic type integro-differential equation with weakly singular kernel is considered, which is a model for dynamic fractional order viscoelasticity. In the second part, the finite element approximation of the linear stochastic wave equation is studied. LÄS MER

  3. 3. On A Posteriori Error Estimation in the Maximum Norm

    Detta är en avhandling från Göteborg : Chalmers University of Technology

    Författare :Mats Boman; Göteborgs universitet.; Gothenburg University.; [2000]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : In this thesis we consider residual-based a posteriori error estimates in the maximum norm for the finite element solution of some partial differential equations. The thesis consists of three papers. The first paper concerns a pointwise a posteriori error estimate for the time dependent obstacle problem. LÄS MER

  4. 4. Parameter identification in constitutive models with a posteriori error control and sensitivity assessment

    Detta är en avhandling från Göteborg : Chalmers University of Technology

    Författare :Håkan Johansson; [2005]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Sensitivity analysis; Goal-oriented error estimate; Calibration; Parameter identification;

    Sammanfattning : In this thesis a framework for the calibration of constitutive models is presented. The framework involves theformulation of an optimization problem which is solved usingstrategies based on, essentially, Newton's method. LÄS MER

  5. 5. On the Finite Element Method for the Time-Dependent Ginzburg-Landau Equations

    Detta är en avhandling från Göteborg : Chalmers University of Technology

    Författare :Johan Ivarsson; Göteborgs universitet.; Gothenburg University.; [2001]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; discontinuous Galerkin method; a posteriori error estimate; adaptive finite element method; duality; residual; Ginzburg-Landau equations; superconductivity;

    Sammanfattning : This thesis is primarily concerned with various issues regarding finite element approximation of the time-dependent Ginzburg-Landau equations. The time-dependent Ginzburg-Landau equations is a macroscopic, phenomenological model of superconductivity, consisting of a system of nonlinear, parabolic partial differential equations. LÄS MER