Özet:

Open channels are hydraulic structures used to transfer the water needed from the source to the desired. The elimination of losses occurring during the transfer of water and the correct analysis of the movement of water will increase the efficiency of open channels. In this study, the water-face profiles of the open channel flow occurring in different cover opening, bottom curvation and current conditions have been numerically modeled. In numerical modeling, continuity and momentum equations are solved with the help of the ANSYS-Fluent program with the method of final volumes. In the numerical modeling of turbulence viscosity, the Re-normalization Group k-ε (RNG) turbulence model based on Reynolds's average Navier Stock (RANS) was used, while the method of fluid volumes was used to determine the water air interval. Numerical water face profiles are compared with the experimental results found in literature. As a result of the comparison, the quantitatively obtained water face profiles were found to be quite compatible with the experimental profiles. Also, the numberally obtained flow lines and turbulence kinetic energy distribution have been evaluated. The characteristics of the venous contract point formed in different current situations are determined. Numerical modeling has been shown to be successful in determining water-face profiles of open-channel flows with different flow characteristics.

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