基于FLUENT的小雷诺数下方柱绕流的数值模拟

Numerical Simulation of Flow Around a Square Cylinder under the Small Reynolds Number Based on FLUENT

采用FLUENT对小雷诺数(Re<52)下方柱绕流进行数值模拟,分析方柱后对称反向漩涡的图谱与漩涡尺寸的特点,分析研究表明:在小雷诺数下,方柱绕流的图谱与圆柱绕流图谱相似,并存在两个特征雷诺数,但两个特征雷诺数较圆柱绕流的小些;方柱绕流对称反向漩涡尺寸与雷诺数呈线性关系变化,并且漩涡发生得比圆柱绕流更为剧烈;方柱绕流柱体后的漩涡能够较容易达到稳定状态。研究结论进一步丰富方柱绕流问题。

By using FLUENT on small Reynolds number（Re 〈 52） square under the flow around,and numerical simulation analysis after reverse vortex symmetric square map and characteristics,and analysis of the size of the vortex research shows that： in the small Reynolds number,the flow around map square with cylindrical map,and similar flow around there are two features Reynolds number,but two features Reynolds number is the flow around cylinder small;Reverse vortex flow around square symmetrical size and Reynolds number in a linear relationship changes,and vortex in cylindrical much more intense than the flow around;Square column flow around the cylinder is easy to achieve stable vortex can state.Research conclusion further enrich the flow around square.