Mesh-free SPH modelling of sediment scouring and flushing considering grains transport and transformation
Sediment scour numerical simulation plays a critical role in the design of water-resistant foundation engineering, and this paper addresses a significant gap in most related studies, which often overlook the transformation of sediment and struggle to identify the actual riverbed obscured by yielding...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2024-12-01
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| Series: | Engineering Applications of Computational Fluid Mechanics |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/19942060.2024.2367510 |
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| author | Rongzhao Zhang Wen Xiong Xiaolong Ma C. S. Cai |
| author_facet | Rongzhao Zhang Wen Xiong Xiaolong Ma C. S. Cai |
| author_sort | Rongzhao Zhang |
| collection | DOAJ |
| description | Sediment scour numerical simulation plays a critical role in the design of water-resistant foundation engineering, and this paper addresses a significant gap in most related studies, which often overlook the transformation of sediment and struggle to identify the actual riverbed obscured by yielding bed and suspended load. To tackle this challenge, a comprehensive sediment model based on the meshless Smoothed Particle Hydrodynamics (SPH) method was developed. Firstly, to enhance computational efficiency and mitigate the high cost of Fluid-Solid Interaction (FSI) between water and sediments, cohesionless sediment grains were modelled as non-Newtonian fluids, with yield strength determined according to a combined strength criterion. Subsequently, sediment transformation and identification were determined based on sediment particle velocity and shear stress, with the seepage force driving yield sediment particle motion at the interface. The effectiveness of this comprehensive sediment model was validated through comparison with three scour experiments. The results show better agreement between the model and experimental data, with a root-mean-square error of less than 2.17% in scour morphology simulation and successful identification of the actual post-scouring bed surface in each case. However, the free surface simulation in this model still exhibits slight error, with a root-mean-square error of less than 8.35%. |
| format | Article |
| id | doaj-art-694146ad468c4b3398bb0f3baf5972d0 |
| institution | Kabale University |
| issn | 1994-2060 1997-003X |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Engineering Applications of Computational Fluid Mechanics |
| spelling | doaj-art-694146ad468c4b3398bb0f3baf5972d02024-12-09T09:43:46ZengTaylor & Francis GroupEngineering Applications of Computational Fluid Mechanics1994-20601997-003X2024-12-0118110.1080/19942060.2024.2367510Mesh-free SPH modelling of sediment scouring and flushing considering grains transport and transformationRongzhao Zhang0Wen Xiong1Xiaolong Ma2C. S. Cai3Department of Bridge Engineering, School of Transportation, Southeast University, Nanjing, People’s Republic of ChinaDepartment of Bridge Engineering, School of Transportation, Southeast University, Nanjing, People’s Republic of ChinaDepartment of Bridge Engineering, School of Transportation, Southeast University, Nanjing, People’s Republic of ChinaDepartment of Bridge Engineering, School of Transportation, Southeast University, Nanjing, People’s Republic of ChinaSediment scour numerical simulation plays a critical role in the design of water-resistant foundation engineering, and this paper addresses a significant gap in most related studies, which often overlook the transformation of sediment and struggle to identify the actual riverbed obscured by yielding bed and suspended load. To tackle this challenge, a comprehensive sediment model based on the meshless Smoothed Particle Hydrodynamics (SPH) method was developed. Firstly, to enhance computational efficiency and mitigate the high cost of Fluid-Solid Interaction (FSI) between water and sediments, cohesionless sediment grains were modelled as non-Newtonian fluids, with yield strength determined according to a combined strength criterion. Subsequently, sediment transformation and identification were determined based on sediment particle velocity and shear stress, with the seepage force driving yield sediment particle motion at the interface. The effectiveness of this comprehensive sediment model was validated through comparison with three scour experiments. The results show better agreement between the model and experimental data, with a root-mean-square error of less than 2.17% in scour morphology simulation and successful identification of the actual post-scouring bed surface in each case. However, the free surface simulation in this model still exhibits slight error, with a root-mean-square error of less than 8.35%.https://www.tandfonline.com/doi/10.1080/19942060.2024.2367510Foundation engineeringbridge scournumerical simulationsmoothed particle hydrodynamicsbed scourtwo-phase |
| spellingShingle | Rongzhao Zhang Wen Xiong Xiaolong Ma C. S. Cai Mesh-free SPH modelling of sediment scouring and flushing considering grains transport and transformation Engineering Applications of Computational Fluid Mechanics Foundation engineering bridge scour numerical simulation smoothed particle hydrodynamics bed scour two-phase |
| title | Mesh-free SPH modelling of sediment scouring and flushing considering grains transport and transformation |
| title_full | Mesh-free SPH modelling of sediment scouring and flushing considering grains transport and transformation |
| title_fullStr | Mesh-free SPH modelling of sediment scouring and flushing considering grains transport and transformation |
| title_full_unstemmed | Mesh-free SPH modelling of sediment scouring and flushing considering grains transport and transformation |
| title_short | Mesh-free SPH modelling of sediment scouring and flushing considering grains transport and transformation |
| title_sort | mesh free sph modelling of sediment scouring and flushing considering grains transport and transformation |
| topic | Foundation engineering bridge scour numerical simulation smoothed particle hydrodynamics bed scour two-phase |
| url | https://www.tandfonline.com/doi/10.1080/19942060.2024.2367510 |
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