【作者】 陈兵； 姜萌； 刘亚坤；

【Author】 Chen Bing Jiang Meng Liu Ya-kun (School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China,

【机构】 大连理工大学土木水利学院；

【摘要】 本文用有限元法求解原始变量的Navier-Stokes方程,结合亚格子应力模型 (SGS),模拟了恒定来流绕直立圆柱的三维流动;并运用简化的冲刷模型,模拟了立柱基础的局部冲刷,得到了近似平衡冲坑形态。由于不直接模拟冲刷随时间发展的整个过程,可大大节省计算量。数值模型与相同条件下的物理模型实验结果对比,符合程度令人满意。更多还原

【Abstract】 The Navier-Stokes equations with primitive variables coupled with sub-grid stress model (SGS) are discretized by finite element method (FEM) to simulate the three dimensional flow around a circular pile induce by a steady ambient current. With a simplified scouring model, the shape of approximate equilibrium scour hole is investigated numerically.In the numerical example presented here, the workload needed is only 1/200 of that needed in simulating whole scour procedures. Compared with the results of laboratory model test carried out by Roulund and Sumer etc. (1999), the numerical results here are reasonable fine.更多还原