Sökning: "Euler equation"

Visar resultat 1 - 5 av 46 avhandlingar innehållade orden Euler equation.

  1. 1. Group theoretical methods for solving multidimensional nonlinear partial differential equations

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Marianna Euler; Luleå tekniska universitet.; [1998]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematics; Matematik;

    Sammanfattning : New methods for constructing both exact and approximate solutions of multidimensional nonlinear partial differential equations are developed. The basis of the methods is taken from the classical Lie transformation group theory. LÄS MER

  2. 2. On Numerical Methods for the Diffusion Equation Subject to Non-Local Boundary Conditions

    Detta är en avhandling från Göteborg : Chalmers University of Technology

    Författare :Gunnar Ekolin; Göteborgs universitet.; Gothenburg University.; [1992]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; forward Euler method; backward Euler method; the Crank-Nicolson method; heat equation; Galerkin finite element methods;

    Sammanfattning : In the first paper three different finite difference methods for solving the heat equation in one space dimension with boundary conditions containing integrals over the interior of the interval are considered. The schemes are based on the forward Euler, the backward Euler and the Crank-Nicolson methods. Error estimates are derived in maximum norm. LÄS MER

  3. 3. Computer-Assisted Proofs and Other Methods for Problems Regarding Nonlinear Differential Equations

    Detta är en avhandling från Uppsala : Department of Mathematics

    Författare :Oswald Fogelklou; Uppsala universitet.; [2012]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; computer-assisted proof; numerical verification; viscous Burgers’ equation; enclosure; existence; nonlinear boundary value problems; Euler equations; inverse problem; bicubic spline; interval analysis; heat equation; fluid limit; peer-to-peer networks; fixed points; stability; global stability; Mathematics; Matematik;

    Sammanfattning : This PhD thesis treats some problems concerning nonlinear differential equations.In the first two papers computer-assisted proofs are used. The differential equations there are rewritten as fixed point problems, and the existence of solutions are proved. LÄS MER

  4. 4. Finite element approximation of the linear stochastic Cahn-Hilliard equation

    Detta är en avhandling från Göteborg : Chalmers University of Technology

    Författare :Ali Mesforush; Göteborgs universitet.; Gothenburg University.; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Cahn-Hilliard-Cook equation; finite element method; backward Euler method; error estimate; strong convergence;

    Sammanfattning : The linearized Cahn-Hilliard-Cook equation is discretized in the spatial variables by a standard finite element method. Strong convergence estimates are proved under suitable assumptions on the covariance operator of the Wiener process, which is driving the equation. The backward Euler time stepping is also studied. LÄS MER

  5. 5. Data Assimilation in Fluid Dynamics using Adjoint Optimization

    Detta är en avhandling från Matematiska institutionen

    Författare :Johan Lundvall; Linköpings universitet.; Linköpings universitet.; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Data assimilation; Inverse problem; Adjoint optimization; Burgers equation; nonlinear; Landweber; Initial pressure; Euler flow; MATHEMATICS Applied mathematics; MATEMATIK Tillämpad matematik;

    Sammanfattning : Data assimilation arises in a vast array of different topics: traditionally in meteorological and oceanographic modelling, wind tunnel or water tunnel experiments and recently from biomedical engineering. Data assimilation is a process for combine measured or observed data with a mathematical model, to obtain estimates of the expected data. LÄS MER