Instability simulation of the submerged anti-dip slope based on the CFD-DEM coupling method
More and more underwater-related geotechnical problems have arisen, but there is little research about the instability process of submerged anti-dip slopes. This study built the CFD–DEM coupling method based on the CFD solver OpenFOAM and the DEM solver PFC. The Ergun test was selected as the benchm...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-01-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2022.1013909/full |
| _version_ | 1797956586487939072 |
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| author | Liangfu Xie Liangfu Xie Liangfu Xie Qingyang Zhu Ying Ge Yongjun Qin |
| author_facet | Liangfu Xie Liangfu Xie Liangfu Xie Qingyang Zhu Ying Ge Yongjun Qin |
| author_sort | Liangfu Xie |
| collection | DOAJ |
| description | More and more underwater-related geotechnical problems have arisen, but there is little research about the instability process of submerged anti-dip slopes. This study built the CFD–DEM coupling method based on the CFD solver OpenFOAM and the DEM solver PFC. The Ergun test was selected as the benchmark test to verify the accuracy of the coupling method, and the pressure drop predicted from the coupling method agreed well with the analytic solution. Then, we built a numerically submerged anti-dip slope model, and a special effort was made to study its instability characteristic. The flow of water will weaken the slope stability, and the birth of cracks will be accelerated. The drag force will restrain the toppling deformation, resulting in a deeper fracture surface. Then, we changed the joint thickness and joint angle to study its effect on slope stability. The collapse load increases with the joint thickness, and the form of toppling deformation changes from flexural failure to block failure. The collapse load increases with the decreasing joint dip, and the position of the damaged area becomes higher; the angle between the bottom fracture surface and the vertical line to joints becomes smaller with the decreasing joint dip. |
| first_indexed | 2024-04-10T23:52:19Z |
| format | Article |
| id | doaj.art-4e991043cce1478595fe1838478703fd |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-04-10T23:52:19Z |
| publishDate | 2023-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-4e991043cce1478595fe1838478703fd2023-01-10T16:20:23ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632023-01-011010.3389/feart.2022.10139091013909Instability simulation of the submerged anti-dip slope based on the CFD-DEM coupling methodLiangfu Xie0Liangfu Xie1Liangfu Xie2Qingyang Zhu3Ying Ge4Yongjun Qin5College of Civil Engineering and Architecture, Xinjiang University, Urumqi, ChinaXinjiang Research Institute of Building Science (Co., Ltd.), Urumqi, ChinaXinjiang Civil Engineering Technology Research Center, Urumqi, ChinaCollege of Civil Engineering and Architecture, Xinjiang University, Urumqi, ChinaDiscipline of Civil and Infrastructure Engineering, School of Engineering, Royal Melbourne Institute of Technology (RMIT University), Melbourne, VIC, AustraliaCollege of Civil Engineering and Architecture, Xinjiang University, Urumqi, ChinaMore and more underwater-related geotechnical problems have arisen, but there is little research about the instability process of submerged anti-dip slopes. This study built the CFD–DEM coupling method based on the CFD solver OpenFOAM and the DEM solver PFC. The Ergun test was selected as the benchmark test to verify the accuracy of the coupling method, and the pressure drop predicted from the coupling method agreed well with the analytic solution. Then, we built a numerically submerged anti-dip slope model, and a special effort was made to study its instability characteristic. The flow of water will weaken the slope stability, and the birth of cracks will be accelerated. The drag force will restrain the toppling deformation, resulting in a deeper fracture surface. Then, we changed the joint thickness and joint angle to study its effect on slope stability. The collapse load increases with the joint thickness, and the form of toppling deformation changes from flexural failure to block failure. The collapse load increases with the decreasing joint dip, and the position of the damaged area becomes higher; the angle between the bottom fracture surface and the vertical line to joints becomes smaller with the decreasing joint dip.https://www.frontiersin.org/articles/10.3389/feart.2022.1013909/fullCFD-DEMwater flowanti-dip slopestabilitycentrifuge test |
| spellingShingle | Liangfu Xie Liangfu Xie Liangfu Xie Qingyang Zhu Ying Ge Yongjun Qin Instability simulation of the submerged anti-dip slope based on the CFD-DEM coupling method Frontiers in Earth Science CFD-DEM water flow anti-dip slope stability centrifuge test |
| title | Instability simulation of the submerged anti-dip slope based on the CFD-DEM coupling method |
| title_full | Instability simulation of the submerged anti-dip slope based on the CFD-DEM coupling method |
| title_fullStr | Instability simulation of the submerged anti-dip slope based on the CFD-DEM coupling method |
| title_full_unstemmed | Instability simulation of the submerged anti-dip slope based on the CFD-DEM coupling method |
| title_short | Instability simulation of the submerged anti-dip slope based on the CFD-DEM coupling method |
| title_sort | instability simulation of the submerged anti dip slope based on the cfd dem coupling method |
| topic | CFD-DEM water flow anti-dip slope stability centrifuge test |
| url | https://www.frontiersin.org/articles/10.3389/feart.2022.1013909/full |
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