FLOW OVER BROAD-CRESTED WEIR WITH INFLOW BY APPROACH SHAFT – NUMERICAL MODEL
DOI:
https://doi.org/10.14311/CEJ.2021.01.0019Keywords:
Approach shaft, Broad-crested weir, Free surface level, Numerical modelAbstract
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.
Downloads
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.
Kirkgoz M. S., Akoz M. S., Oner A. A., 2008. Experimental and theoretical analyses of two-dimensional flows upstream of broad-crested weirs. Canadian Journal of Civil Engineering, 35(9), 975-986.
Lu X., Zou Q., Reeve D., 2011. Numerical simulation of overflow at vertical weirs using a hybrid level set/VOF method. Advanced in Water Resources, 34(10), 1320-1334.
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.
FLOW 3D. User manual, Version 9.3. Flow Science, Inc., 2008.
MENTER, F. R. Improved Two Equation k-ω Turbulence Models for Aerodynamic Flows. Ames Research Center, Moffett Field, California, 1992.
URUBA, V. Turbulence. CTU in Prague, 2014.
Downloads
Published
Issue
Section
License
Copyright (c) 2021 Civil Engineering Journal
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
