Analysis of flow characteristics of two circular cylinders in cross-flow with varying Reynolds number: a review

The present study reviews the physical attributes of the fluid behaviour in the flow regimes of steady cross-flow around two infinite circular cylinders. Some critical complexities in the wake interference of the flow across two cylinders for tandem, side-by-side and staggered arrangements have been described by different researchers in the past. In this aspect, the analyses as reported by the past researchers have been considered around the wake area. So far, the researchers have explored the effects of drag coefficient, vortex shedding frequencies, Strouhal number and different range of Reynolds number for bluff bodies. The real-time study to understand the fluid behaviour in the wake region is rarely carried out by any researcher in the past. In this study, an investigation of flow field around two circular cylinders with different geometrical configurations has been carried out. A broad range of Reynolds number and diameters of the cylinders have been used. With these two parameters in consideration, Strouhal number, near-wake flow interference and drag coefficient have been reviewed. The highlights of the flow characteristics in the wake of two cylinders have been evaluated and suitably outlined. The physical perspectives in each flow regimes have been discussed in detail as well. Experimental and numerical investigations as found in the literature have also been analysed.