Browsing by Subject "Turbulence"

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  • A numerical study of the laminar necklace vortex system and its effect on the wake for a circular cylinder 

    Authors:Kirkil, Gökhan; Constantinescu, George
    Publisher and Date:(Amer Inst Physics, 2012)
    Large eddy simulation (LES) is used to investigate the structure of the laminar horseshoe vortex (HV) system and the dynamics of the necklace vortices as they fold around the base of a circular cylinder mounted on the flat bed of an open channel for Reynolds numbers defined with the cylinder diameter D smaller than 4460. The study concentrates on the analysis of the structure of the HV system in the periodic breakaway sub-regime which is characterized by the formation of three main necklace vortices. ...

  • Large Eddy Simulation of Wind Flow over A Realistic Urban Area 

    Authors:Kirkil, Gökhan; Lin, Ching-Long
    Publisher and Date:(MDPI, 2020)
    A high-resolution large eddy simulation (LES) of wind flow over the Oklahoma City downtown area was performed to explain the effect of the building height on wind flow over the city. Wind flow over cities is vital for pedestrian and traffic comfort as well as urban heat effects. The average southerly wind speed of eight meters per second was used in the inflow section. It was found that heights and distribution of the buildings have the greatest impact on the wind flow patterns. The complexity of ...