Wake Modifications in Confined Flows Due to the Presence of a Downstream Cylinder in Staggered Arrangement
Keywords:Drag coefficient, Lift coefficient, Square cylinder, Strouhal number, Vortex shedding.
In the present study, confined flows around two square cylinders in staggered arrangement were numerically investigated. Cross-flow and streamwise center-to-center spacings of one- and three-cylinder diameters, respectively, were considered. Simulations were carried out at Reynolds numbers Re = 50,100,150 and 180, where the resulting wakes are laminar and periodic. Results indicate that the presence of the downstream cylinder tends to reduce the Strouhal number, amplitude and the time-averaged lift coefficient of the upstream cylinder relative to the single cylinder cases. Furthermore, the time variations of upstream cylinderâ€™s lift coefficient behave similar to that of a single cylinder.
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