Sökning: "wave equation"

Visar resultat 16 - 20 av 160 avhandlingar innehållade orden wave equation.

  1. 16. Analysis and Applications of the Heterogeneous Multiscale Methods for Multiscale Elliptic and Hyperbolic Partial Differential Equations

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Doghonay Arjmand; KTH.; [2013]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Multiscale Methods; HMM; Multiscale Wave Equation; Multiscale Elliptic Equation; Long Time Wave Propagation; SRA - E-Science SeRC ; SRA - E-vetenskap SeRC ;

    Sammanfattning : This thesis concerns the applications and analysis of the Heterogeneous Multiscale methods (HMM) for Multiscale Elliptic and Hyperbolic Partial Differential Equations. We have gathered the main contributions in two papers. LÄS MER

  2. 17. Wave Loads on Offshore Wind Power Plants

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Jenny Trumars; [2006]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ocean engineering; shallow water; fatigue; Non-linear waves; wave load; wind energy converter; perturbation theory;

    Sammanfattning : The thesis gives a short introduction to waves and discusses the problem with non-linear waves in shallow water and how they effect an offshore wind energy converter. The focus is on the realisation of non-linear waves in the time domain from short-term statistics in the form of a variance density spectrum of the wave elevation. LÄS MER

  3. 18. On some Nonlinear Aspects of Wave Motion

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Erik Wahlén; Lund University.; Lunds universitet.; [2005]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; water waves; bifurcation; global existence; rod equation; wabve breaking;

    Sammanfattning : In the first part of this thesis we consider the governing equations for capillary water waves given by the Euler equations with a free surface under the influence of surface tension over a flat bottom. We look for two-dimensional steady periodic waves. The problem is first transformed to a nonlinear elliptic equation in a rectangle. LÄS MER

  4. 19. Half-Space and Shock-Wave Problems for Discrete Velocity Models of the Boltzmann Equation

    Detta är en avhandling från Karlstad : Universitetstryckeriet, Karlstad

    Författare :Niclas Bernhoff; Karlstads universitet.; [2005]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Boltzmann equation; discrete velocity models; boundary value problems; shock-waves; Matematik; Mathematics;

    Sammanfattning : We study some questions related to general discrete velocity (with arbitrarily number of velocities) models (DVMs) of the Boltzmann equation. In the case of plane stationary problems the typical DVM reduces to a dynamical system (system of ODEs). Properties of such systems are studied in the most general case. LÄS MER

  5. 20. On Half-Space and Shock-Wave Problems for Discrete Velocity Models of the Boltzmann Equation

    Detta är en avhandling från Karlstads universitet

    Författare :Niclas Bernhoff; Karlstads universitet.; [2005]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Boltzmann equation; discrete velocity models; boundary value problems; shock waves; MATHEMATICS; MATEMATIK; Matematik; Mathematics;

    Sammanfattning : We study some questions related to general discrete velocity (with arbitrarily number of velocities) models (DVMs) of the Boltzmann equation. In the case of plane stationary problems the typical DVM reduces to a dynamical system (system of ODEs). Properties of such systems are studied in the most general case. LÄS MER