水道港口Issue(3)：227-233,7.
亚临界雷诺数下圆柱和方柱绕流数值模拟
Numerical simulation of the flow around circular and square cylinder at sub-critical Reynolds numbers
摘要
Abstract
With the RNG k-εmodel and the finite volume method,the flow around a two-dimensional circular cylinder and a two-dimensional square cylinder at sub-critical Reynolds numbers was simulated and evaluated, and the trends of drag coefficients and Strouhal numbers with the change of Reynolds numbers from 3×102 to 3×105 were obtained. Meanwhile, characteristics of the flow around a circular cylinder and a square cylinder at Re = 22 000 have been compared and analyzed in detail. Calculation results show that drag coefficient of flow around a circular cylinder is lower than the drag coefficient of flow around a square cylinder with the same Reynold number. Howev-er, the Strouhal number of flow around a circular cylinder is slightly higher than the Strouhal number of flow around a square cylinder. Though their boundary layer separation points are different, the flow field evolution and the vor-tex shedding of two cylinders have some similarities.关键词
亚临界雷诺数/圆柱和方柱/绕流/数值模拟/RNG k-ε模型Key words
sub-critical Reynolds numbers/circular and square cylinder/flow around body/numerical simula-tion/RNG k-εmodel分类
建筑与水利引用本文复制引用
沈立龙,刘明维,吴林键,李鹏飞,舒丹..亚临界雷诺数下圆柱和方柱绕流数值模拟[J].水道港口,2014,(3):227-233,7.基金项目
国家科技支撑计划项目(2012BAB05B04) （2012BAB05B04）
