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Article

Numerical Simulation of an Air-Core Vortex and Its Suppression at an Intake Using OpenFOAM

1
School of Engineering, University of Energy and Natural Resources, BS-0061-2164 Sunyani, Ghana
2
AWD Consult Inc., South Portland, ME 04106, USA
3
College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter EX4 4QF, UK
*
Author to whom correspondence should be addressed.
Fluids 2020, 5(4), 221; https://doi.org/10.3390/fluids5040221
Received: 14 October 2020 / Revised: 3 November 2020 / Accepted: 14 November 2020 / Published: 26 November 2020
(This article belongs to the Special Issue Selected Papers from the 15th OpenFOAM Workshop)
A common challenge faced by engineers in the hydraulic industry is the formation of free surface vortices at pump and power intakes. This undesirable phenomenon which sometimes entrains air could result in several operational problems: noise, vibration, cavitation, surging, structural damage to turbines and pumps, energy losses, efficiency losses, etc. This paper investigates the numerical simulation of an experimentally observed air-core vortex at an intake using the LTSInterFoam solver in OpenFOAM. The solver uses local time-stepping integration. In simulating the air-core vortex, the standard kε, realizable kε, renormalization group (RNG) kε and the shear stress transport (SST) kω models were used. The free surface was modelled using the volume of fluid (VOF) model. The simulation was validated using a set of analytical models and experimental data. The SST kω model provided the best results compared to the other turbulence models. The study was extended to simulate the effect of installing an anti-vortex device on the formation of a free surface vortex. The LTSInterFoam solver proved to be a reliable solver for the steady state simulation of a free surface vortex in OpenFOAM. View Full-Text
Keywords: intake; air-core vortex; LTSInterFoam; OpenFOAM; volume of fluid (VOF) intake; air-core vortex; LTSInterFoam; OpenFOAM; volume of fluid (VOF)
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MDPI and ACS Style

Domfeh, M.K.; Gyamfi, S.; Amo-Boateng, M.; Andoh, R.; Ofosu, E.A.; Tabor, G. Numerical Simulation of an Air-Core Vortex and Its Suppression at an Intake Using OpenFOAM. Fluids 2020, 5, 221. https://doi.org/10.3390/fluids5040221

AMA Style

Domfeh MK, Gyamfi S, Amo-Boateng M, Andoh R, Ofosu EA, Tabor G. Numerical Simulation of an Air-Core Vortex and Its Suppression at an Intake Using OpenFOAM. Fluids. 2020; 5(4):221. https://doi.org/10.3390/fluids5040221

Chicago/Turabian Style

Domfeh, Martin K., Samuel Gyamfi, Mark Amo-Boateng, Robert Andoh, Eric A. Ofosu, and Gavin Tabor. 2020. "Numerical Simulation of an Air-Core Vortex and Its Suppression at an Intake Using OpenFOAM" Fluids 5, no. 4: 221. https://doi.org/10.3390/fluids5040221

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