Salinity Intrusion Modeling Using Boundary Conditions on a Laboratory Setup: Experimental Analysis and CFD Simulations

Salinity intrusion is one of the most pressing threats to unconfined coastal aquifers, and its simulation is of great importance for groundwater research and management. This study compared the performances of two computational fluid dynamics (CFD) software applications, ANSYS Fluent 2022 R2 and COM...

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Veröffentlicht in:Water (Basel) 2024-07, Vol.16 (14), p.1970
Hauptverfasser: Chalá, Dayana Carolina, Castro-Faccetti, Claudia, Quiñones-Bolaños, Edgar, Mehrvar, Mehrab
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container_end_page
container_issue 14
container_start_page 1970
container_title Water (Basel)
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creator Chalá, Dayana Carolina
Castro-Faccetti, Claudia
Quiñones-Bolaños, Edgar
Mehrvar, Mehrab
description Salinity intrusion is one of the most pressing threats to unconfined coastal aquifers, and its simulation is of great importance for groundwater research and management. This study compared the performances of two computational fluid dynamics (CFD) software applications, ANSYS Fluent 2022 R2 and COMSOL Multiphysics 5.6, in simulating the transport of saltwater in a pilot-scale experimental setup, which was built to recreate two boundary conditions of unconfined aquifers with homogeneous stratigraphy. The experiments were performed until the saline wedge reached a quasi-steady-state condition. Sequential photographs and image analysis were required to record the movement of the saline toe and the saline wedge location. The maximum toe length was achieved under the head-controlled boundary condition, with a toe length of 1.6 m after 7 h of the experiment, and 1.65 m and 1.79 m for the COMSOL and ANSYS Fluent simulations, respectively. The findings evidence that the flux-controlled condition produced a better representation of the saline wedge than the head-controlled condition, indicating good agreement between the CFD simulations and the experimental data. Recommendations for future research include CFD simulations of real coastal aquifers and coupling fluid dynamics with other processes such as land subsidence.
doi_str_mv 10.3390/w16141970
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The findings evidence that the flux-controlled condition produced a better representation of the saline wedge than the head-controlled condition, indicating good agreement between the CFD simulations and the experimental data. 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subjects Accuracy
Algorithms
Aquifers
Boundary conditions
Comparative analysis
computer software
Computer software industry
Experiments
Fluid dynamics
fluid mechanics
groundwater
Groundwater flow
Heat transfer
image analysis
Management
Neural networks
saline water
Salinity
Simulation
Simulation methods
Software
stratigraphy
subsidence
Water
Water, Underground
title Salinity Intrusion Modeling Using Boundary Conditions on a Laboratory Setup: Experimental Analysis and CFD Simulations
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