https://doi.org/10.1140/epjp/s13360-023-04161-4
Regular Article
Numerical study on effect of reservoir vortex on velocity distribution profile in pipe
1
School of Civil Engineering, Iran University of Science and Technology, Tehran, Iran
2
Department of Civil Engineering, Faculty of Engineering, Hakim Sabzevari University, Sabzevar, Iran
Received:
1
January
2023
Accepted:
4
June
2023
Published online:
12
June
2023
In the present research, effect of entering formed free surface air-core vortex over the intake in the reservoir on flow velocity distribution in the pipe is studied, numerically. LES (Large Eddy Simulation) is used for turbulence modeling scheme along with the volume of fluids (VOF) for distinguishing the free water surface. According to the performed verification with the experimental data, it was concluded that the total deviation between numerical results and experimental data was below 15%. Results showed that formation of an air-core vortex on top of the intake affects the maximum velocity components distribution by decreasing the maximum axial (Vz), radial (Vr) and tangential (Vθ) velocities about 15%, 27.5% and 33.7%, respectively. Moreover, peak values of the velocity components relocate to the upper half of the pipe cross section that velocity vectors also confirmed it.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
