Drag Reduction for Flow Past a Square Cylinder Using Rotating Control Cylinders—A Numerical Simulation

  • Ghosh Subhankar
  • S. Senthilkumar
  • S. Karthikeyan
Conference paper
Part of the Lecture Notes in Mechanical Engineering book series (LNME)


This paper investigates the effect of two control cylinders of same circular cross section on reduction of drag caused by vortex shedding phenomenon at the downstream of the flow past a square cylinder. Numerical computations are performed for a Reynolds number of 100 as this is well below the transitional flow regime where the effect of vortex shedding phenomenon is more significant. Simulations are carried out using a Finite Volume CFD solver for five different positions along with three different rotational speeds (5, 10, 20 rad/s) and directions (clockwise, anticlockwise) of control cylinders. Validation of the base case (i.e., without any control cylinder) shows a good agreement with the available literature data. The transient variations of lift and drag coefficients are monitored for each case and compared with those of the base case. The vortex shedding phenomenon and the physics behind the drag reduction are explained with the help of streamlines and drag coefficient plots. The most effective case with 4% drag reduction is identified when xc = 0.65, yc = 0.45 with the top cylinder rotating in the clockwise direction and the bottom cylinder rotating in the anticlockwise direction with a rotational speed of 20 rad/s.


Square cylinder Rotating control cylinder Drag reduction Rotational speed 


  1. 1.
    Choi, H., Jeon, W.P., Kim, J.: Control of flow over a bluff body. Annu. Rev. Fluid Mech. 40, 113–139 (2008)MathSciNetCrossRefGoogle Scholar
  2. 2.
    Saha, A.K., Shrivastava, A.: Suppression of vortex shedding around a square cylinder using blowing. Sadhana 40(3), 769–785 (2015)MathSciNetCrossRefGoogle Scholar
  3. 3.
    Islam, S.U., Manzoor, R., Islam, Z.U., Kalsoom, S., Ying, Z.C.: A computational study of drag reduction and vortex shedding suppression of flow past a square cylinder in presence of small control cylinders. AIP Adv. 7(4), 045119 (2017). Scholar
  4. 4.
    Ali, M.S.M., Doolan, C.J., Wheatley, V.: Flow around a square cylinder with a detached downstream flat plate at a low Reynolds number. In: 17th Australasian Fluid Mechanics Conference, New Zealand (2010)Google Scholar
  5. 5.
    Zhang, W., Jiang, Y., Li, L., Chen, G.: Effects of wall suction/blowing on two-dimensional flow past a confined square cylinder. SpringerPlus 5(1), 985 (2016). Scholar
  6. 6.
    Pantokratoras, A.: Laminar flow across an unbounded square cylinder with suction or injection. Z. Angew. Math. Phys. 68(1) (2017)Google Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Ghosh Subhankar
    • 1
  • S. Senthilkumar
    • 1
  • S. Karthikeyan
    • 1
  1. 1.Department of Aeronautical EngineeringVel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and TechnologyChennaiIndia

Personalised recommendations