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Article

Computational Fluid Dynamics Simulation of Suspended Solids Transport in a Secondary Facultative Lagoon Used for Wastewater Treatment

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Departamento de Energía, Universidad de la Costa CUC, Calle 58 # 55-66, Barranquilla 080002, Colombia
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Department of Civil, Construction and Environmental Engineering, North Carolina State University, 208 Mann Hall, Campus Box 7908, Raleigh, NC 27696-7908, USA
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Instituto Cinara, Universidad del Valle, Calle 13 # 100-00 Edificio 341, Cali 76001, Colombia
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Centro Internacional Franco Argentino de Ciencias de la Información y de Sistemas CIFASIS-CONICET-UNR, Ocampo y Esmeralda S2000 EZP, Rosario S2000EZP, Argentina
*
Author to whom correspondence should be addressed.
Academic Editor: T. Staffan Lundström
Water 2021, 13(17), 2356; https://doi.org/10.3390/w13172356
Received: 3 June 2021 / Revised: 22 August 2021 / Accepted: 23 August 2021 / Published: 27 August 2021
The facultative lagoon hydrodynamics has been evaluated using computational fluid dynamics tools, however, little progress has been made in describing the transport of suspended solids within these systems, and their effects on fluid hydrodynamics. Traditionally, CFD models have been built using pure water. In this sense, the novelty in this study was to evaluate the influence of suspended solids transport on the hydrodynamics of an facultative lagoon. Two three-dimensional CFD models were developed, a single-phase model (pure water) and a two-phase model (water and suspended solids), for a conventional FL in Ginebra, Valle del Cauca, Colombia. Model results were compared with experimental tracer studies, displaying different tracer dispersion characteristics. Differences in the fluid velocity field were identified when suspended solids were added to the simulation. The fluid velocities in the single-phase model were greater than the fluid velocities obtained in the two-phase model, (0.127 m·s−1 and 0.115 m·s−1, respectively). Additionally, the dispersion number of each model showed that the single-phase model (0.478) exhibited a better behavior of complete mixing reactor than the two-phase model (0.403). These results can be attributed to the effect of the drag and slip forces of the solids on the velocity of the fluid. In conclusion, the fluid of FL in these models is better represented as a two-phase fluid in which the particle–fluid interactions are represented by drag and slip forces. View Full-Text
Keywords: CFD; hydrodynamics; single-phase model; suspended solids transport; tracer test; two-phase model CFD; hydrodynamics; single-phase model; suspended solids transport; tracer test; two-phase model
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MDPI and ACS Style

Zapata Rivera, A.M.; Ducoste, J.; Peña, M.R.; Portapila, M. Computational Fluid Dynamics Simulation of Suspended Solids Transport in a Secondary Facultative Lagoon Used for Wastewater Treatment. Water 2021, 13, 2356. https://doi.org/10.3390/w13172356

AMA Style

Zapata Rivera AM, Ducoste J, Peña MR, Portapila M. Computational Fluid Dynamics Simulation of Suspended Solids Transport in a Secondary Facultative Lagoon Used for Wastewater Treatment. Water. 2021; 13(17):2356. https://doi.org/10.3390/w13172356

Chicago/Turabian Style

Zapata Rivera, Andres M., Joel Ducoste, Miguel R. Peña, and Margarita Portapila. 2021. "Computational Fluid Dynamics Simulation of Suspended Solids Transport in a Secondary Facultative Lagoon Used for Wastewater Treatment" Water 13, no. 17: 2356. https://doi.org/10.3390/w13172356

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