Modeling Longitudinal and Transverse Velocity Profiles Upstream of an Orifice Using the FLOW-3D Model

Document Type : Research Paper

Authors

1 MS Student, Department of Water Structures, Faculty of Water and Environmental Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran.

2 Assistant Professor, Department of Water Structures, Faculty of Water and Environmental Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran.

3 Professor, Department of Water Structures, Faculty of Water and Environmental Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran.

Abstract

The current study investigated the longitudinal flow velocity profile upstream of an orifice for different water depths using the FLOW-3D model. Experimental design was used along with LES, Laminar, and  turbulence models to calibrate the model. The obtained results indicated that turbulence models had almost high and equal accuracy for predicting longitudinal velocity profiles. For various depths upstream of the orifice, the general form of the longitudinal velocity profile followed an exponential function with high accuracy. Moreover, at larger-distance upstream of the orifice, the transverse velocity profile became uniform. Eventually, it was found that with the rise in the depth upstream of the orifice by eight times, the shear stress created on the bed increased by 148%.

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References

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Irrigation Sciences and Engineering
Volume 44, Issue 2
September 2021
Pages 1-9

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History

  • Receive Date: 03 January 2021
  • Revise Date: 20 January 2021
  • Accept Date: 25 January 2021
  • Publish Date: 22 June 2021

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