Three-dimensional numerical study of a local scour downstream of a submerged sluice gate using two hydro-morphodynamic models, SedFoam and FLOW-3D
Three-dimensional numerical simulations were performed, based on an experimental study of sediments scour process subjected to a water jet downstream of a submerged sluice gate with a rectangular opening at the bottom in a very confined channel. This experimental geometry, little studied in the lite...
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Académie des sciences
2023-12-01
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| Series: | Comptes Rendus. Mécanique |
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| Online Access: | https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.5802/crmeca.223/ |
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| author | Ghzayel, Alaa Beaudoin, Anthony |
| author_facet | Ghzayel, Alaa Beaudoin, Anthony |
| author_sort | Ghzayel, Alaa |
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| description | Three-dimensional numerical simulations were performed, based on an experimental study of sediments scour process subjected to a water jet downstream of a submerged sluice gate with a rectangular opening at the bottom in a very confined channel. This experimental geometry, little studied in the literature, presents two particular phenomena in the dynamics of the scour process: a change of the dune form and a digging - refilling cycles of the scour. Two different hydro-morphodynamic models, SedFoam and FLOW-3D, were used and calibrated according to the experimental data. SedFoam is a multiphase flow model based on the open-source tool-box OpenFOAM and uses a coupling method between the fluid and particles phases in the RANS equations through the dense granular rheology, while FLOW-3D is an CFD software that uses a sediment scour model to perform sediment transport through bedload and suspended load transport equations without direct coupling with the fluid phase. The use of these specific three-dimensional numerical models in the case of the water flow with a jet in a very confined channel has allowed to evaluate the accuracy of turbulence models used. The RNG $K-\varepsilon $ turbulence model was used in FLOW-3D while the $K-\omega $ turbulence model was used in SedFoam. The RNG $K-\varepsilon $ turbulence model is more numerically stable for a finer mesh size. Based on the comparison of the three-dimensional numerical results with the experimental data, a discussion has allowed to explain the two particular phenomena in the dynamics of the scour process, a change of the dune form and a digging - refilling cycles of the scour, observed in the experimental data. It was concluded that the dune shape-shifting is due to the hydro-morphodynamic behaviour of the interaction of fluid-particles in presence of high degree of confinement while the digging - refilling phenomenon is explained by the physical mechanics behaviour of the particles phase due to gravity. |
| format | Article |
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| institution | Kabale University |
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| language | English |
| publishDate | 2023-12-01 |
| publisher | Académie des sciences |
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| series | Comptes Rendus. Mécanique |
| spelling | doaj-art-d5f42db2dbb64723937937460196c5362025-02-07T13:47:15ZengAcadémie des sciencesComptes Rendus. Mécanique1873-72342023-12-01351G252555010.5802/crmeca.22310.5802/crmeca.223Three-dimensional numerical study of a local scour downstream of a submerged sluice gate using two hydro-morphodynamic models, SedFoam and FLOW-3DGhzayel, Alaa0Beaudoin, Anthony1https://orcid.org/0000-0002-2886-1094Institut Pprime, SP2MI-Téléport 2, boulevard Marie et Pierre Curie, BP 30179, 86962 Futuroscope Chasseneuil Cedex, FranceInstitut Pprime, SP2MI-Téléport 2, boulevard Marie et Pierre Curie, BP 30179, 86962 Futuroscope Chasseneuil Cedex, FranceThree-dimensional numerical simulations were performed, based on an experimental study of sediments scour process subjected to a water jet downstream of a submerged sluice gate with a rectangular opening at the bottom in a very confined channel. This experimental geometry, little studied in the literature, presents two particular phenomena in the dynamics of the scour process: a change of the dune form and a digging - refilling cycles of the scour. Two different hydro-morphodynamic models, SedFoam and FLOW-3D, were used and calibrated according to the experimental data. SedFoam is a multiphase flow model based on the open-source tool-box OpenFOAM and uses a coupling method between the fluid and particles phases in the RANS equations through the dense granular rheology, while FLOW-3D is an CFD software that uses a sediment scour model to perform sediment transport through bedload and suspended load transport equations without direct coupling with the fluid phase. The use of these specific three-dimensional numerical models in the case of the water flow with a jet in a very confined channel has allowed to evaluate the accuracy of turbulence models used. The RNG $K-\varepsilon $ turbulence model was used in FLOW-3D while the $K-\omega $ turbulence model was used in SedFoam. The RNG $K-\varepsilon $ turbulence model is more numerically stable for a finer mesh size. Based on the comparison of the three-dimensional numerical results with the experimental data, a discussion has allowed to explain the two particular phenomena in the dynamics of the scour process, a change of the dune form and a digging - refilling cycles of the scour, observed in the experimental data. It was concluded that the dune shape-shifting is due to the hydro-morphodynamic behaviour of the interaction of fluid-particles in presence of high degree of confinement while the digging - refilling phenomenon is explained by the physical mechanics behaviour of the particles phase due to gravity.https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.5802/crmeca.223/scouringconfined water jetCFD modelingturbulence modelingmulti-phase flow modelsediment scour model |
| spellingShingle | Ghzayel, Alaa Beaudoin, Anthony Three-dimensional numerical study of a local scour downstream of a submerged sluice gate using two hydro-morphodynamic models, SedFoam and FLOW-3D Comptes Rendus. Mécanique scouring confined water jet CFD modeling turbulence modeling multi-phase flow model sediment scour model |
| title | Three-dimensional numerical study of a local scour downstream of a submerged sluice gate using two hydro-morphodynamic models, SedFoam and FLOW-3D |
| title_full | Three-dimensional numerical study of a local scour downstream of a submerged sluice gate using two hydro-morphodynamic models, SedFoam and FLOW-3D |
| title_fullStr | Three-dimensional numerical study of a local scour downstream of a submerged sluice gate using two hydro-morphodynamic models, SedFoam and FLOW-3D |
| title_full_unstemmed | Three-dimensional numerical study of a local scour downstream of a submerged sluice gate using two hydro-morphodynamic models, SedFoam and FLOW-3D |
| title_short | Three-dimensional numerical study of a local scour downstream of a submerged sluice gate using two hydro-morphodynamic models, SedFoam and FLOW-3D |
| title_sort | three dimensional numerical study of a local scour downstream of a submerged sluice gate using two hydro morphodynamic models sedfoam and flow 3d |
| topic | scouring confined water jet CFD modeling turbulence modeling multi-phase flow model sediment scour model |
| url | https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.5802/crmeca.223/ |
| work_keys_str_mv | AT ghzayelalaa threedimensionalnumericalstudyofalocalscourdownstreamofasubmergedsluicegateusingtwohydromorphodynamicmodelssedfoamandflow3d AT beaudoinanthony threedimensionalnumericalstudyofalocalscourdownstreamofasubmergedsluicegateusingtwohydromorphodynamicmodelssedfoamandflow3d |