Main Article Content
The application of cylindrical objects, such as pipelines and risers, in the marine industry is irresistible. Vortex shedding in wake flow downstream blunt bodies may cause vibrations, which result in structural failures in case of closeness or matching natural frequencies. This study aims to explore the effects of geometrical arrangements on the suppression of vortex shedding phenomena. Cylinders of different diameters and pitch distances are used to change the flow dynamics. The flow is considered to be incompressible and steady. A numerical study of flow passing a single cylinder with various diameters and two unequal cylinders with varying pitch distances is conducted. Results show a complete vortex suppression at δ/D=4. These results are expected to be useful for the verification of computational models of unsteady Newtonian flows.
Toukir I, Rakibul HSM, Mohammad A. Flow separation phenomena for steady flow over a circular cylinder at low reynolds number. Int J Automot Mech Eng. 2013;8:1406-1415.
Abhinav G. Arun S. Suppression of vortex shedding in flow around a square cylinder using control cylinder. Eur J Mech B Fluids. 2019;76:276-291.
Shams UI, Raheela M, Zia UI, Shazia K, Zhou CY. A computational study of drag reduction and vortex shedding suppression of flow past a square cylinder in presence of small control cylinders. AIP Adv. 2017;7(4):19.
Rashihi S, Hayatdavoodi M, Esfahani J. Vortex shedding suppression and wake control: a review. Ocean Eng. 2016;126:57-80.
Tsutsui T. Flow control around a circular cylinder by a small rod. ACC J. 2019;25(1):78-86.
Yan L, Yangyang L, Bin L, Wanhai X. Cross-flow vortex-induced vibration reduction of a long flexible cylinder using 3 and 4 control rods with different configurations. Appl Ocean Res. 2019;91:1-13.
Gozmen B, Akilli H, Sahin B. Passive control of circular cylinder wake in shallow flow. Meas. 2013;46(3):1125-1136.
Hongjun Z, Jie Y, Yue M, Hongnan Z, Youbo T. Simultaneous CFD evaluation of VIV suppression using smaller control cylinders. J Fluids Struct. 2015;57:66-80.
Xiong Y, Peng S, Zhang M, Yang D. Numerical study on the vortex-induced vibration of a circular cylinder in viscoelastic fluids. J Nonnewton Fluid Mech. 2019;272:1-13.
Assi GRS, Orselli R, Silva OM. Control of vortex shedding from a circular cylinder surrounded by eight rotating wake-control cylinders at Re=100. J Fluids Struct. 2019;89;13-24.
Manish KC, Sushanta D, Bhupendra KG. Wake flow modification behind a square cylinder using control rods. J Wind Eng Ind Aerod. 2019;184:342-361.
Blanchard A, Bergman LA, Vakakis AF. Vortex-induced vibration of a linearly sprung cylinder with an internal rotational nonlinear energy sink in turbulent flow. Nonlinear Dyn. 2020;99(1):593-609.