The effects of flow division angle in rectangular channel branches

Authors

1 water Department, BuAli sina university, hamadan, iran

2 Water Engineering Department, Kermanshah Branch, Islamic Azad University, Kermanshah

Abstract

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.

Keywords

References

Bradbrook KF, Lane SN, Richards KS, Biron PM and Roy AG, 2001. Role of bed discordance at asymmetrical river confluences. Journal of Hydraulic Engineering 127(5): 351-368.
Ghobadian R and Basiri M, 2016. The effect of downstream curved edge on local scouring at 60-degree open channel junction using SSIIM1 model. Ain Shams Engineering Journal 7(2): 543-552.
Goudarzizadeh R, Hedayat N and Jahromi S, 2010. Three-dimensional simulation of flow pattern at the lateral intake in straight path, using finite-volume method. World Academy of Science, Engineering and Technology 47: 656-661.
Hager WH, 1984. An approximate treatment of flow in branches and bends. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 198(1): 63-69.
Honnar T and Mazloum Shahraki H, 2014. Effects of submerged sheets on intake amount in side intakes. Soil and Water – University of Tabriz 24(3): 205-214.
Jalil HR, Hosseinzadeh Dalir H and Farsadizade D, 2014. Study of the effects of the shape of intake on flow pattern and vortexes created around entrance using numerical models. Soil and Water Science – University of Tabriz 24(1): 29-40.
Karami Moghaddam M and Seyedian SM, 2016. Simulation of flow divert from main intake would vertical and declined walls using FLUENT. Soil and Water Science – University of Tabriz 26(1): 1-12.
Kasthuri B and Pundarikanthan NV, 1987. Discussion of separation zone at open channel junction. Journal of Hydraulic Engineering 113(4): 543-544.
Lakshmana RNS, Sridharan K and Baig MYA, 1968. Experimental study of the division of flow in an open channel. Pp. 139-142. In Australasian Conf. on Hydraul. and Fluid Mech., Sydney, Australia.
Neary VS and Odgaard AJ, 1993. Three-dimensional flow structure at open-channel diversions. Journal of Hydraulic Engineering 119(11): 1223-1230.
Ramamurthy AS and Satish MG, 1988. Division of flow in short open channel branches. Journal of Hydraulic Engineering, 114(4): 428-438.
Ramamurthy AS, Qu J and Zhai C, 2006. 3D simulation of combining flows in 90 rectangular closed conduits. Journal of Hydraulic Engineering 132(2): 214-218.
Ramamurthy AS, Qu J and Vo D, 2007. Numerical and experimental study of dividing open-channel flows. Journal of Hydraulic Engineering 133(10): 1135-1144.
Shamloo H and Pirzadeh B, 2007. Numerical investigation of velocity field in dividing open-channel flow. Pp. 194-198. In Proceedings of the 12 th WSEAS International Conference on APPLIED MATHEMATICS, 194-198.
Shettar AS and Murthy KK, 1996. A numerical study of division of flow in open channels. Journal of Hydraulic Research 34(5): 651-675.
Wang XG, Yan ZM and Guo WD, 2007. Three-dimensional simulation for effects of bed discordance on flow dynamics at Y-shaped open channel confluences Project supported by the National Natural Science Foundation of China (Grant No. 30490235). Journal of Hydrodynamics, Ser B 19(5): 587-593.
 
Water and Soil Science
Volume 30, Issue 1
May 2020
Pages 193-204

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