Study on flow past structures and its aerodynamic characteristics

在城市空间中建造了许多建筑物。建筑物周围的气流是复杂的气流。因此，本研究的目的是展示垂直和水平排列的方形圆柱体对均匀流动的气动特性。计算中考虑的结构模型为两个方圆柱体。众所周知，垂直于均匀流排列的两个方柱间的阻力在方柱间距为3时突然发生变化。在数值计算中得到了阻力现象。均匀流动水平排列的方柱体周围的流型变为不对称流型。

Many structures have been constructed in urban spaces. Air currents around the structures are complicated flows. Therefore, the purpose of this research is to show aerodynamic characteristics of square cylinders arranged vertically and horizontally to uniform flows. Models of structures considered in computations are two square cylinders.It is well known that the drag force of two square cylinders arranged vertically to the uniform flow changes suddenly when a gap size between the square cylinders equals to 3. The phenomenon of the drag force is obtained in our numerical computation.Flow profiles around square cylinders arranged horizontally to uniform flows become unsymmetrical ones.