TY - JFULL AU - R.Goudarzizadeh and S.H.Mousavi Jahromi and N.Hedayat PY - 2010/12/ TI - Simulation of 3D Flow using Numerical Model at Open-channel Confluences T2 - International Journal of Physical and Mathematical Sciences SP - 1436 EP - 1442 VL - 4 SN - 1307-6892 UR - https://publications.waset.org/pdf/7030 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 47, 2010 N2 - This paper analytically investigates the 3D flow pattern at the confluences of two rectangular channels having 900 angles using Navier-Stokes equations based on Reynolds Stress Turbulence Model (RSM). The equations are solved by the Finite- Volume Method (FVM) and the flow is analyzed in terms of steadystate (single-phased) conditions. The Shumate experimental findings were used to test the validity of data. Comparison of the simulation model with the experimental ones indicated a close proximity between the flow patterns of the two sets. Effects of the discharge ratio on separation zone dimensions created in the main-channel downstream of the confluence indicated an inverse relation, where a decrease in discharge ratio, will entail an increase in the length and width of the separation zone. The study also found the model as a powerful analytical tool in the feasibility study of hydraulic engineering projects. ER -