Wake modifications in confined flows due to the presence of a downstream cylinder in staggered arrangement

• Main Authors: Abdul Hamid, Ahmad Hussein, Mahmud, Jamaluddin, Noh, Mohd Hafiz, Mohammed Sapardi, Mohd Azan
• Format: Article
• Language: English; English
• Published: Science Publishing Corporation Inc 2018
• Subjects: TJ241 Machine construction (General)
• Online Access: http://irep.iium.edu.my/70134/1/70134_Wake%20Modifications%20in%20Confined%20Flows.pdf; http://irep.iium.edu.my/70134/2/70134_Wake%20Modifications%20in%20Confined%20Flows%20_SCOPUS.pdf; http://irep.iium.edu.my/70134/; https://www.sciencepubco.com/index.php/ijet/article/view/22500/11039

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 cylinder’s lift coefficient behave similar to that of a single cylinder.