TY - JOUR
TI - Flow past two finite-length wall-mounted cylinders in tandem arrangement at Re = 200
AU - Zhou Xing
AU - Wang Shifeng
AU - Nie Deming
JN - Thermal Science
PY - 2022
VL - 26
IS - 101
SP - 1
EP - 18
PT - Article
AB - To investigate the characteristics of flow over two finite-length cylinders  in tandem arrangement, numerical simulations were performed using CFD  technique for spacing ratios (S = D/d, where d is the diameter of the  cylinders and D is the separation gap between the cylinders) between 0.5 and  12 at a Reynolds number of 200. The height-to-diameter ratio (h/d, where h  is the height of the cylinders) was fixed at 8. This study primarily focuses  on the effects of S and the free ends on the vortical structure behind the  cylinders. The S has a significant effect on the Strouhal number and on the  lift and drag coefficients of cylinders. The results show extremely  different vortex streets at different cylinder heights. With an increase in  S, the average drag coefficient of the downstream cylinder increases,  whereas that of the upstream cylinder first decreases and then increases.  Additionally, as S changes between 4.5 and 5, the average drag coefficient  of the two cylinders changes suddenly. The effects of S on Strouhal number  and the lift coefficient ex-hibit a complex behavior.