【摘要】 应用非均匀格子Boltzman方法对方柱绕流的三种情况进行详细数值模拟.在第1种情况中,方柱位于流场中央,模拟了卡门涡街现象,给出了斯特鲁哈数随雷诺数变化曲线;在第2种情况中,方柱位于流场壁面,分析了雷诺数对方柱后回流区的影响;在第3种情况中,两方柱并列在流场中央,考察了方柱间距对流场的影响.更多还原

【Abstract】 Three cases of flow past square cylinder and two square cylinders are investigated in detail with a nonuniform lattice Boltzmann method. For case 1, the square cylinder is located at the center of the channel, the krmn vortex is successfully simulated and the Strouhal numbers at different Reynolds numbers are given; For case 2 , the square cylinder is located at a wall of flow field, the recirculation lengths behind the square cylinder at different Reynolds numbers are considered; For case 3, two square cylinders arranged side by side in the center of the channel,the flow features at different spacing ratios are studied.更多还原