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چکیده
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Vegetation signifcantly afects kinetic energy, capacity, and resistance forces in open channels. The degree of inundation, fexibility, density, and geometry of vegetation are among the most important factors that alter the fow dynamics of a river in a vegetated area. In this study, the efects of submergence conditions, arrangement, and density of vegetation on fow velocity were investigated in a numerical approach. A CFD model was used to reproduce steady-state fow in a vegetated channel. The standard volume of fuid (VOF) method was used to track free surface evolution. Turbulence structures were captured using the renormalized groups (RNG) model after performing sensitivity analyses on turbulence models and mesh resolution. The model was validated using experimental data from the literature. The results showed that the model could efciently reproduce the fow velocity in free zones and within the vegetated area. The values of fow velocity were higher in free zones than within the vegetated area. The location of the infection points changed depending on the height and arrangement of the vegetation and the submergence conditions.
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