FLOW OVER BROAD-CRESTED WEIR WITH INFLOW BY APPROACH SHAFT – NUMERICAL MODEL

Authors

  • Jakub Major AQUATIS a.s., Botanická 834/56, Brno, Czech Republic
  • Martin Orfánus Slovak University of Technology in Bratislava, Faculty of Civil Engineering, Department of Hydraulic Engineering, Bratislava, Slovakia
  • Zbyněk Zachoval Brno University of Technology, Faculty of Civil Engineering, Institute of Water structures, Brno, Czech Republic

DOI:

https://doi.org/10.14311/CEJ.2021.01.0019

Keywords:

Approach shaft, Broad-crested weir, Free surface level, Numerical model

Abstract

In the case of flow over rectangular broad-crested weir, where the inflow is realized by approach shaft, occurs influence of water surface level by approach flow velocity. The paper describes numerical model of flow including weir, approach and outlet shaft. Simulations of flow were created by 2D and 3D model with using three methods of turbulent modelling. In this paper a water surface level for each model setup is evaluated and then it is compared with measured values.

References

Major J., 2020. Influence of inflow orientation on overflow characteristics over broad-crest (in Czech), Doctoral thesis, BUT, Brno.

Major, J., Zachoval, Z. Numerical model of flow over broad-crested-weir with inlet shaft (in Czech). Report of project ERASMUS+ č. 91/2017-2018, BUT, Brno, 2018.

Major, J., Zachoval, Z. Influence of inflow shaft geometry on capacity of broad-crested weir (in Czech). Report of project FAST-J-17-4577, BUT, Brno, 2018.

Major, J. Influence of the transverse dimension of the inlet shaft on overflow of broad-crested weir (in Czech). Czech Journal of Civil Engineering. 2018.

Afshar H., Hoseini S. H., 2013. Experimental and 3-D numerical simulation of flow over a rectangular broad-crested weir. International Journal of Engineering and Advanced Technology, 2(6), 214-219.

Hargreaves D. M., Morvan H. P., Wright N. G., 2007. Validation of the volume of fluid method for free surface calculation: The broad-crested weir. Engineering Applications of Computational Fluid Mechanics, 1(2), 136-146.

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Sarker, M. A., Rhodes D. G., 2004. Calculation of free-surface profile over a rectangular broad-crested weir. Flow Measurement and Instrumentation, 15(4), 215-219, 2004.

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Published

2021-04-09

How to Cite

Major, J., Orfánus, M., & Zachoval, Z. (2021). FLOW OVER BROAD-CRESTED WEIR WITH INFLOW BY APPROACH SHAFT – NUMERICAL MODEL. Stavební Obzor - Civil Engineering Journal, 30(1). https://doi.org/10.14311/CEJ.2021.01.0019

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