首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Computational fluid dynamics modeling of abutment scour under steady current using the level set method
Institution:1. Department of Civil Engineering, Indian Institute of Technology, Kharagpur, India;2. Department of Civil and Environmental Engineering, Norwegian University of Science and Technology, Trondheim, Norway;1. Department of Water Resources Engineering, Chulalongkorn University, Bangkok, 10330, Thailand;2. WISE Research Unit, Chulalongkorn University, Bangkok, 10330, Thailand;3. Bureau of Water Management and Hydrology, Royal Irrigation Department, Bangkok, 10300, Thailand;1. Civil Engineering Department, Ferdowsi University of Mashhad, Iran;2. Civil Engineering Department, School of Engineering, Water and Environment Research Institute, Ferdowsi University of Mashhad, Iran;1. Center of Computational Energy, Department of Mechanical Engineering, Hakim Sabzevari University, Sabzevar, Iran;2. Department of Civil Engineering, Hakim Sabzevari University, Sabzevar, Iran;3. Aalto University, Marine Technology, Espoo, Finland;1. National Engineering Laboratory of Port Hydraulic Construction Technology, Tianjin Research Institute of Water Transport Engineering, Tianjin 300456, China;2. Key Laboratory of Engineering Sediment of Ministry of Transport, Tianjin Research Institute of Water Transport Engineering, Tianjin 300456, China;3. Hohai University, College of Harbour, Coastal and Offshore Engineering, Nanjing 210098, China;4. The University of Auckland, Department of Civil and Environmental Engineering, Auckland, New Zealand;1. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, 210098, China;2. Yangtze Institute for Conservation and Development, Hohai University, Nanjing, 210098, China;3. College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing, 210098, China;4. Department of Engineering, University of Cambridge, Cambridge, UK
Abstract:The scour and deposition pattern around an abutment under constant discharge condition is calculated using a three dimensional (3D) Computational Fluid Dynamics (CFD) model. The Reynolds-Averaged Navier Stokes (RANS) equations are solved in three dimensions using a CFD model. The Level Set Method (LSM) is used for calculation of both free surface and bed topography. The two-equation turbulence model (k-ε and k-ω) is used to calculate the eddy viscosity in the RANS equations. The pressure term in the RANS equations on a staggered grid is modeled using the Chorin's projection method. The 5th order Weighted Essentially Non-Oscillatory (WENO) scheme discretizes the convective term of the RANS equations. The Kovacs and Parker and Dey formulations are used for the reduction in bed shear stress on the sloping bed. The model also used the sandslide algorithm which limits bed shear stress reduction during the erosion process. The numerical model solution is validated against experimental results collected at the Politecnico di Milano, Milan, Italy. Further, the numerical model is tested for performance by varying the grid sizes and key parameters like the space and time discretization schemes. The effect of varying bed porosity has been evaluated. Overall, the free surface is well represented in a realistic manner and bed topography is well predicted using the Level Set Method (LSM).
Keywords:Sediment transport  Computational Fluid Dynamics (CFD)  Reynolds-Averaged Navier Stokes (RANS)  Level Set Method (LSM)  Weighted Essentially Non-Oscillatory (WENO)  Total Variation Diminishing (TVD)
本文献已被 维普 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号