Search for dissertations about: "Johan Jansson"

Showing result 1 - 5 of 36 swedish dissertations containing the words Johan Jansson.

  1. 1. High Performance Adaptive Finite Element Methods : With Applications in Aerodynamics

    Author : Niclas Jansson; Johan Hoffman; Johan Jansson; Vincent Heuveline; KTH; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : The massive computational cost for resolving all scales in a turbulent flow makes a direct numerical simulation of the underlying Navier-Stokes equations impossible in most engineering applications. Recent advances in adaptive finite element methods offer a new powerful tool in Computational Fluid Dynamics (CFD). READ MORE

  2. 2. Adaptive Finite Element Methods for Fluid Structure Interaction Problems with Applications to Human Phonation

    Author : Niyazi Cem Degirmenci; Johan Hoffman; Johan Jansson; David Nordsletten; KTH; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Fluid Structure Interaction; Finite Element Method; Contact Modeling; Acoustic Coupling; High Performance Computing; Tillämpad matematik och beräkningsmatematik; Applied and Computational Mathematics;

    Abstract : This work presents a unified framework for numerical solution of Fluid Structure Interaction (FSI) and acoustics problems with focus on human phonation. The Finite Element Method is employed for numerical investigation of partial differential equations that model conservation of momentum and mass. READ MORE

  3. 3. High-Performance Finite Element Methods : with Application to Simulation of Diffusion MRI and Vertical Axis Wind Turbines

    Author : Van-Dang Nguyen; Johan Hoffman; Johan Jansson; Axel Målqvist; KTH; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; High performance finite element method; computational diffusion MRI; turbulent flow; vertical axis wind turbine.; Datalogi; Computer Science;

    Abstract : The finite element methods (FEM) have been developed over decades, and together with the growth of computer engineering, they become more and more important in solving large-scale problems in science and industry. The objective of this thesis is to develop high-performance finite element methods (HP-FEM), with two main applications in mind: computational diffusion magnetic resonance imaging (MRI), and simulation of the turbulent flow past a vertical axis wind turbine (VAWT). READ MORE

  4. 4. High Performance Finite Element Methods with Application to Simulation of Vertical Axis Wind Turbines and Diffusion MRI

    Author : Van Dang Nguyen; Johan Hoffman; Johan Jansson; Mats Larson; KTH; []
    Keywords : High performance finite element method; computational diffusion MRI; turbulent flow; vertical axis wind turbine; Cloud computing.; högprestanda finita elementmetod; beräkningsdiffusionsmagnetresonanstomografi; turbulent flöde; vertikalaxlad vindturbin; datormolnberäkning; Tillämpad matematik och beräkningsmatematik; Applied and Computational Mathematics; Biologisk fysik; Biological Physics; Datalogi; Computer Science; Teknisk mekanik; Engineering Mechanics; Matematik; Mathematics; Biological and Biomedical Physics; Biologisk och biomedicinsk fysik;

    Abstract : Finite element methods have been developed over decades, and together with the growth of computer power, they become more and more important in dealing with large-scale simulations in science and industry.The objective of this thesis is to develop high-performance finite element methods, with two concrete applications: computational fluid dynamics (CFD) with simulation of turbulent flow past a vertical axis wind turbine (VAWT), and computational diffusion magnetic resonance imaging (CDMRI). READ MORE

  5. 5. Where to shop? : understanding consumers' choices of grocery stores

    Author : Elin Nilsson; Anna-Carin Nordvall; Agneta Marell; Johan Jansson; Johan Hagberg; Umeå universitet; []
    Keywords : SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; consumer decision-making; store choice; situation-based choices; cognitive proximity; företagsekonomi; Business Studies;

    Abstract : For the last couple of decades consumer decision-making has been of increasing interest for retail as well as for consumer behaviour research. Food shopping constitutes a unique type of shopping behaviour. READ MORE