Numerical Modeling of Flow Field in Three Types of Vortex Settling Basins
Publication: Journal of Irrigation and Drainage Engineering
Volume 147, Issue 12
Abstract
Vortex settling basins (VSBs) are efficient and economical structures that use free-surface vortex strength to remove sediment particles from flow. In this study, computational fluid dynamics was employed to predict and evaluate the effects of basin geometry on performance and flow field structure. The flow field was calculated using Reynolds-averaged Navier–Stokes modeling and large eddy simulation. Verification of the numerical simulations was carried out based on experimental data obtained using a typical VSB model. The Smagorinsky model results for abstraction ratio, velocity component, and free-surface flow were superior to those of the other turbulence models. The distinctive features of two previously proposed designs for vortex settling basins were investigated, and a new geometry to enhance these features is presented. The results indicated that the new geometry provided better performance in generating a symmetric central vortex, lengthening the particle settling path and decreasing the abstraction ratio.
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Data Availability Statement
All data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
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Journal of Irrigation and Drainage Engineering
Volume 147 • Issue 12 • December 2021
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© 2021 American Society of Civil Engineers.
History
Received: Dec 8, 2020
Accepted: Aug 3, 2021
Published online: Sep 20, 2021
Published in print: Dec 1, 2021
Discussion open until: Feb 20, 2022
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