Author(s): Emre Haspolat; Mete Koken
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Keywords: No Keywords
Abstract: The present study aims to investigate the influence of the submergence ratio on the flow characteristics inside the rigid vegetation array using Detached Eddy Simulation (DES). Three cases having different submergence ratios were tested under a constant stem Reynolds number and vegetation density. The numerical results demonstrate that the mean streamwise velocity in the stem layer increases as the submergence ratio increases. Moreover, increasing the submergence ratio amplifies the turbulent kinetic energy (TKE) downstream region of each vegetation stem. Therefore, the overall TKE values along the array increase as the submergence ratio increases. A shear layer height also grows more rapidly for a vegetation array with a higher submergence ratio. Although greater wake length is developed in an array with a larger submergence ratio, the wake width remains unaffected by the submergence ratio variation. Finally, a detailed flow visualization reveals that there is not any horseshoe vortex development at the base of any vegetation stem for the given flow condition and vegetation density.
Year: 2024