Volume 9 Issue 4
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Article Navigation >  Water Science and Engineering  > 2016  >  9(4): 336-344
Azadeh Gholami, Hossein Bonakdari, Ali Akbar Akhtari. 2016: Assessment of water depth change patterns in 120° sharp bend using numerical model. Water Science and Engineering, 9(4): 336-344. doi: 10.1016/j.wse.2017.01.004
Citation: Azadeh Gholami, Hossein Bonakdari, Ali Akbar Akhtari. 2016: Assessment of water depth change patterns in 120° sharp bend using numerical model. Water Science and Engineering, 9(4): 336-344. doi: 10.1016/j.wse.2017.01.004
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Assessment of water depth change patterns in 120° sharp bend using numerical model

doi: 10.1016/j.wse.2017.01.004

  • Department of Civil Engineering, Razi University, Kermanshah 67149, Iran

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  • Corresponding author: Hossein Bonakdari
  • Received Date: 2015-11-29
  • Rev Recd Date: 2016-04-26
    Abstract
  • In this study, FLUENT software was employed to simulate the flow pattern and water depth changes in a 120° sharp bend at four discharge rates. To verify the numerical model, a 90° sharp bend was first modeled with a three-dimensional numerical model, and the results were compared with available experimental results. Based on the numerical model validation, a 120° bend was simulated. The results show that the rate of increase of the water depth at the cross-section located 40 cm before the bend, compared with the cross-sections located 40 cm and 80 cm after the bend, decreases with the increase of the normal water depth in the 120° curved channel. Moreover, with increasing normal water depth, the water depth change decreases at all cross-sections. At the interior cross-sections of the bend, the transverse water depth slope of the inner half-width is always greater than that of the outer half-width of the channel. Hence, the water depth slope is nonlinear at each cross-section in sharp bends. Two equations reflecting the relationships between the maximum and minimum dimensionless water depths and the normal water depth throughout the channel were obtained.

     

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