두 개의 구를 지나는 유동 패턴

초록

In this investigation, flow patterns past two identical nearby spheres at Re=300 were numerically studied. We considered all possible arrangements of the two spheres in terms of the distance between the spheres and, the angle inclined with respect to the main flow direction. It turns out that significant changes in shedding characteristics are noticed depending on how the two spheres are positioned. Collecting all the numerical results obtained, we propose diagrams for flow pattern on the distance vs. angle plane. The perfect geometrical symmetry implied in the flow configuration allows one to use those diagrams to identify flow patterns past two identical spheres arbitrarily positioned in physical space with respect to the main flow direction.