并排方柱绕流的大涡数值模拟及显示

摘要

采用大涡模拟的方法对雷诺数为7.5×105并排双方柱绕流流场进行了数值模拟,并对所采用的模拟方法进行了实验验证.利用有限体积法和SIMPLE算法计算程式,对双方柱三维物理模型求解不可压缩的N-S方程.计算得到了方柱绕流的速度场和涡量场以及不同时刻的速度分量分布情况.对方柱后速度场、涡旋形成、脱落以及波动性等问题进行了分析,结果符合物理学规律.%rge eddy simulation method is adopted to carry out numerical simulation of flow fields a-round two parallel square cylinders with Reynolds number of 7.5 × 105, and the adopted simulation method is tested via experiments. The finite volume method and SIMPLE algorithm are used to solve the incompressible N-S equations. The flow velocity and vortices fields around two square cylinders the distribution conditions of velocity components at different time are obtained, and the velocity field, vortex formation, vortex loss and other behaviors are analyzed. The simulation results are in agreement with the laws of physics.