Sökning: "NEK5000"

Visar resultat 1 - 5 av 6 uppsatser innehållade ordet NEK5000.

  1. 1. Validation of a moderate Reynolds number channel in Neko

    Master-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Shicheng Dai; [2023]
    Nyckelord :Neko; CFD; DNS; Turbulence channel flow;

    Sammanfattning : Neko is a portable framework for high-order spectral element flow simulations[1]. Originally from Nek5000, Neko not only inherited its numerical stability and well-performance, but also added the benefits of dynamic memory and support for many current accelerator backends. LÄS MER

  3. 2. Towards an Efficient Spectral Element Solver for Poisson’s Equation on Heterogeneous Platforms

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Jonas Nylund; [2022]
    Nyckelord :Neko; CUDA; Heterogeneous hardware; GPU; Gather-Scatter; HPC; CFD; Neko; CUDA; Heterogena plattformar; GPU; Gather-Scatter; Högprestandabe-räkningar; Beräkningsströmningsdynamik;

    Sammanfattning : Neko is a project at KTH to refactor the widely used fluid dynamics solver Nek5000 to support modern hardware. Many aspects of the solver need adapting for use on GPUs, and one such part is the main communication kernel, the Gather-Scatter (GS) routine. To avoid race conditions in the kernel, atomic operations are used, which can be inefficient. LÄS MER

  4. 3. Investigation of Larminar Flow inside a Torus in OpenFOAM

    Master-uppsats, KTH/Mekanik

    Författare :Pavan Prabhudev; [2019]
    Nyckelord :;

    Sammanfattning : The work deals with an investigation of steady, laminar and incompressible flow inside a toroidal pipe. In particular, our aim is to investigate the effects of curvature and the Reynolds-number on the flow features. LÄS MER

  5. 4. Investigation of Outflow Boundary Conditions for Convection-Dominated Incompressible Fluid Flows in a Spectral Element Framework

    Master-uppsats, KTH/Numerisk analys, NA

    Författare :Erik Boström; [2015]
    Nyckelord :;

    Sammanfattning : In this thesis we implement and study the effects of different convective outflow boundary conditions for the high order spectral element solver Nek5000 in the context of solving convective-dominated fluid flow problems. By numerical testing we show that the convective boundary conditions preserve the spatial and temporal convergence rates of the solver. LÄS MER

  7. 5. Numerical Simulation of Wind Turbine Wakes based on Actuator Line Method in NEK5000

    Master-uppsats, KTH/Mekanik

    Författare :Wenjie Jin; [2013]
    Nyckelord :Wind Turbine; Wake Flow; Actuator Line Method; NEK5000; Trip Vortices;

    Sammanfattning : Nowadays wind turbines are clustered in wind farms and the wake development plays an important role in energy production and blade fatigue load of tubines. The actuator line method is an effective modeling approach that gives improtant wake flow characterstics of a wind turbine. LÄS MER