Search for dissertations about: "Olof Runborg"

Showing result 1 - 5 of 16 swedish dissertations containing the words Olof Runborg.

  2. 1. Multiscale and multiphase methods for wave propagation

    Author : Olof Runborg; KTH; []
    Keywords : ;

    Abstract : .... READ MORE

  4. 2. Analysis and Applications of Heterogeneous Multiscale Methods for Multiscale Partial Differential Equations

    Author : Doghonay Arjmand; Olof Runborg; Marcus Grote; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Numerical homogenization; long time wave propagation; multiscale PDEs; Tillämpad matematik och beräkningsmatematik; Applied and Computational Mathematics;

    Abstract : This thesis centers on the development and analysis of numerical multiscale methods for multiscale problems arising in steady heat conduction, heat transfer and wave propagation in heterogeneous media. In a multiscale problem several scales interact with each other to form a system which has variations over a wide range of scales. READ MORE

  5. 3. Analysis and Applications of the Heterogeneous Multiscale Methods for Multiscale Elliptic and Hyperbolic Partial Differential Equations

    Author : Doghonay Arjmand; Olof Runborg; Axel Målqvist; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Multiscale Methods; HMM; Multiscale Wave Equation; Multiscale Elliptic Equation; Long Time Wave Propagation; SRA - E-vetenskap SeRC ; SRA - E-Science SeRC ;

    Abstract : 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. READ MORE

  6. 4. Paths to improving atmospheric models across scales : The importance of the unresolved scales

    Author : Kerstin Hartung; Gunilla Svensson; Rodrigo Caballero; Olof Runborg; Heikki Järvinen; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; global climate models; atmospheric blocking; topographic forcing; physical parametrizations; single-column model; atmosphere-ocean single-column model; air-sea interaction; atmosfärvetenskap och oceanografi; Atmospheric Sciences and Oceanography;

    Abstract : Correct representation of physical processes, the parametrizations, and their interaction with the resolved circulation is crucial for the performance of numerical models. Here, focus is put on understanding model biases and developing tools to alleviate existing biases. READ MORE

  7. 5. Multiscale Methods for Wave Propagation Problems

    Author : Henrik Holst; Björn Engquist; Olof Runborg; Assyr Abdulle; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Simulations of wave propagation in heterogeneous media and at high frequencies are important in many applications such as seismic-, {electro-magnetic-,} acoustic-, fluid flow problems and others. These are classical multiscale problems and often too computationally expensive for direct numerical simulation. READ MORE