# Sökning: "Beräkningsvetenskap med inriktning mot numerisk analys"

Visar resultat 1 - 5 av 38 avhandlingar innehållade orden Beräkningsvetenskap med inriktning mot numerisk analys.

1. ## 1. Hybrid Methods for Unsteady Fluid Flow Problems in Complex Geometries

Sammanfattning : In this thesis, stable and efficient hybrid methods which combine high order finite difference methods and unstructured finite volume methods for time-dependent initial boundary value problems have been developed. The hybrid methods make it possible to combine the efficiency of the finite difference method and the flexibility of the finite volume method. LÄS MER

2. ## 2. Stable and High-Order Finite Difference Methods for Multiphysics Flow Problems

Sammanfattning : Partial differential equations (PDEs) are used to model various phenomena in nature and society, ranging from the motion of fluids and electromagnetic waves to the stock market and traffic jams. There are many methods for numerically approximating solutions to PDEs. LÄS MER

3. ## 3. Efficient Simulation of Wave Phenomena

Sammanfattning : Wave phenomena appear in many fields of science such as acoustics, geophysics, and quantum mechanics. They can often be described by partial differential equations (PDEs). As PDEs typically are too difficult to solve by hand, the only option is to compute approximate solutions by implementing numerical methods on computers. LÄS MER

4. ## 4. On Numerical Solution Methods for Block-Structured Discrete Systems

Sammanfattning : The development, analysis, and implementation of efficient methods to solve algebraic systems of equations are main research directions in the field of numerical simulation and are the focus of this thesis. Due to their lesser demands for computer resources, iterative solution methods are the choice to make, when very large scale simulations have to be performed. LÄS MER

5. ## 5. Perfectly Matched Layers and High Order Difference Methods for Wave Equations

Sammanfattning : The perfectly matched layer (PML) is a novel technique to simulate the absorption of waves in unbounded domains. The underlying equations are often a system of second order hyperbolic partial differential equations. In the numerical treatment, second order systems are often rewritten and solved as first order systems. LÄS MER 