University of Tabriz Water and Soil Science 2008-5133 30 1 2020 03 20 The effects of flow division angle in rectangular channel branches The effects of flow division angle in rectangular channel branches 193 204 12170 FA Majeid Heydari water Department, BuAli sina university, hamadan, iran Saeid Shabanlou Water Engineering Department, Kermanshah Branch, Islamic Azad University, Kermanshah Journal Article 2018 03 11 Generally, intakes are used for transferring and diverting the flow within main channels and rivers. In current study, flow field was simulated using FLOW-3D software. In addition, to model the flow free surface variations were predicted using the Volume of Fluid (VOF) scheme. The flow field turbulent was estimated by standard k-ε and RNG k-ε turbulence models. For instance, the MAE value for standard k-ε and RNG k-ε turbulence models were respectively computed 0.166 and 0.201. The modeling results showed that the numerical model simulated the flow field with acceptable accuracy. For example, the RMSE, MAE and R values for flow free surface simulation were calculated 0.164, 0.158 and 0.997, respectively. Then, the effects four flow division angles (30, 45, 75 and 90 degree) on flow field pattern were considered. As regarding the modeling results, the highest depth-averaged velocity for model 45 degree was obtained. Among models with division angle 30, 45 and 75 degree, maximum shear stress for model 45 degree was predicted. Generally, intakes are used for transferring and diverting the flow within main channels and rivers. In current study, flow field was simulated using FLOW-3D software. In addition, to model the flow free surface variations were predicted using the Volume of Fluid (VOF) scheme. The flow field turbulent was estimated by standard k-ε and RNG k-ε turbulence models. For instance, the MAE value for standard k-ε and RNG k-ε turbulence models were respectively computed 0.166 and 0.201. The modeling results showed that the numerical model simulated the flow field with acceptable accuracy. For example, the RMSE, MAE and R values for flow free surface simulation were calculated 0.164, 0.158 and 0.997, respectively. Then, the effects four flow division angles (30, 45, 75 and 90 degree) on flow field pattern were considered. As regarding the modeling results, the highest depth-averaged velocity for model 45 degree was obtained. Among models with division angle 30, 45 and 75 degree, maximum shear stress for model 45 degree was predicted. https://water-soil.tabrizu.ac.ir/article_12170_b5272dbc6478203688bca0387527effc.pdf