Search for dissertations about: "dynamic mode decomposition."
Showing result 1 - 5 of 28 swedish dissertations containing the words dynamic mode decomposition..
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1. Utilization of Decomposition Techniques for Analyzing and Characterizing Flows
Abstract : This thesis presents the utilization of two different decomposition techniques, proper orthogonal decomposition (POD) and dynamic mode decomposition (DMD), for enhanced understanding of flow structures and their stability. The advantages of these techniques are shown for a range of flow situations, most of which are turbulent. READ MORE
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2. Modal Decomposition of Separated Nozzle Flow
Abstract : The applicability of two different eigenvalue algorithms coupled with an axisymmetric RANS solver to predict the eigenmodes of separated supersonic flow inside an axisymmetric convergent-divergent nozzle was investigated. These are the Arnoldi and the Dynamic Mode Decomposition (DMD) algorithms, respectively. READ MORE
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3. Flow control and reduced-order modelling of transition in shear flows
Abstract : In this thesis direct numerical simulation is used to investigate the possibility to delay the transition from a laminar to a turbulent flow in boundary layer flows. Furthermore, modal analysis techniques are used to identify the coherent structures in wind turbine wake. READ MORE
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4. Modal Analysis of Supersonic Flow Separation in Nozzles
Abstract : Operating a convergent-divergent nozzle under overexpanded conditions can lead to supersonic flow separation in the divergent section of the nozzle. In this case, an attached oblique shock wave forms at the separation base. READ MORE
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5. Analysis of Flow Structures in Wake Flows for Train Aerodynamics
Abstract : Train transportation is a vital part of the transportation system of today anddue to its safe and environmental friendly concept it will be even more impor-tant in the future. The speeds of trains have increased continuously and withhigher speeds the aerodynamic effects become even more important. READ MORE