Search for dissertations about: "kurt otto"
Showing result 1 - 5 of 6 swedish dissertations containing the words kurt otto.
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1. Construction and Analysis of Preconditioners for First-order PDE
Abstract : .... READ MORE
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2. Domain Decomposition and Preconditioned Iterative Methods for the Helmholtz Equation
Abstract : New preconditioned iterative solution methods for the Helmholtz equation are constructed. To evaluate the performance of the methods, two-dimensional problems with a waveguide geometry are used as model problems. Second- and fourth-order accurate finite difference discretizations are used. READ MORE
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3. Design of High Performance Computing Software for Genericity and Variability
Abstract : Computer simulations have emerged as a cost efficient complement to laboratory experiments, as computers have become increasingly powerful. The aim of the present work is to explore the ideas of some state of the art software development practices, and ways in which these can be useful for developing high performance research codes. READ MORE
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4. Handling of curvilinear coordinates in a PDE solver framework
Abstract : By the use of object-oriented analysis and design combined with variability modeling a highly flexible software model for the metrics handling functionality of a PDE solver framework was obtained. This new model was evaluated in terms of usability, particularly with respect to efficiency and flexibility. READ MORE
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5. A high-order accurate, collocated boundary element method for wave propagation in layered media
Abstract : The ultimate goal of this research is to construct a hybrid model for sound propagation in layered underwater environments with curved boundaries by employing a differential formulation for inhomogeneous layers and a boundary integral formulation for homogeneous layers. The discretization of the new hybrid model is a combination of a finite difference method for the Helmholtz equation for inhomogeneous media and a collocated boundary element method (BEM) for the integral equation for homogeneous media, while taking special care of the open boundaries and the common interface. READ MORE