Wind and Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Forces and flow around three side-by-side square cylinders

  • Zheng, Qinmin (Institute for Turbulence-Noise-Vibration Interaction and Control, Harbin Institute of Technology) ;
  • Alam, Md. Mahbub (Institute for Turbulence-Noise-Vibration Interaction and Control, Harbin Institute of Technology) ;
  • Rehman, S. (Center for Engineering Research, Research Institute, King Fahd University of Petroleum and Minerals) ;
  • Maiti, D.K. (Department of Applied Mathematics with Oceanology and Computer Programming Vidyasagar University)
  • Received : 2018.09.07
  • Accepted : 2019.02.28
  • Published : 2019.07.25
⟨ Previous Next ⟩

Abstract

A numerical investigation on forces and flow around three square cylinders in side-by-side arrangement is conducted at a Reynolds number Re = 150 with the cylinder center-to-center spacing ratio L/W = 1.1 ~ 9.0, where W is the cylinder side width. The flowat this Re is assumed to be two-dimensional, incompressible, and Newtonian. The flow simulation is conducted by using ANSYS-Fluent. The flow around the three side-by-side cylinders entails some novel flow physics, involving the interaction between the gap and free-stream side flows as well as that between the two gap flows. An increase in L/W from 1.1 to 9.0 leads to five distinct flow regimes, viz., base-bleed flow (L/W < 1.4), flip-flopping flow (1.4 < L/W < 2.1), symmetrically biased beat flow (2.1 < L/W < 2.6), non-biased beat flow (2.6 < L/W < 7.25) and weak interaction flow (7.25 < L/W < 9.0). The gap flow behaviors, time-averaged and fluctuating fluid forces, time-averaged pressure, recirculation bubble, formation length, and wake width in each flow regime are discussed in detail.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China, Council of Shenzhen

References

  1. Alam, M.M., Moriya, M. and Sakamoto, H. (2003), "Aerodynamic characteristics of two side-by-side circular cylinders and application of wavelet analysis on the switching phenomenon", J. Fluid. Struct., 18(3-4), 325-346. https://doi.org/10.1016/j.jfluidstructs.2003.07.005.
  2. Alam, M.M. and Zhou, Y. (2013), "Intrinsic features of flow around two side-by-side square cylinders", Phys. Fluids, 25(8), 085106. https://doi.org/10.1063/1.4817670.
  3. Alam, M.M. and Zhou, Y. (2007), "Flow around two side-by-side closely spaced circular cylinders", J. Fluid. Struct., 23(5),799-805. https://doi.org/10.1016/j.jfluidstructs.2006.12.002.
  4. Alam, M.M., Zhou, Y. and Wang, X.W. (2011), "The wake of two side-by-side square cylinders," J. Fluid Mech., 669, 432-471. https://doi.org/10.1017/S0022112010005288.
  5. Alam, M.M., Zheng, Q. and Hourigan, K. (2017), "The wake and thrust by four side-by-side cylinders at a low Re", J. Fluid. Struct., 70, 131-144. https://doi.org/10.1016/j.jfluidstructs.2017.01.014.
  6. Baranyi, L. (2003), "Computation of unsteady momentum and heat transfer from a fixed circular cylinder in laminar flow", J. Comput. Appl. Mech., 4(1), 13-25.
  7. Carini, M., Giannetti, F. and Auteri, F. (2014), "On the origin of the flip-flop instability of two side-by-side cylinder wakes", J. Fluid Mech., 742, 552-576. https://doi.org/10.1017/jfm.2014.9.
  8. Choi, C. and Yang, K. (2013), "Three-dimensional instability in the flow past two side-by-side square cylinders", Phys. Fluids, 25(7), 74107. https://doi.org/10.1063/1.4813628.
  9. Kang, S. (2003), "Characteristics of flow over two circular cylinders in a side-by-side arrangement at low Reynolds numbers", Phys. Fluids, 15(9), 2486. https://doi.org/10.1063/1.1596412.
  10. Kim, S., and Alam, M.M. (2015), "Characteristics and suppression of flow-induced vibrations of two side-by-side circular cylinders", J. Fluid. Struct., 54, 629-642. https://doi.org/10.1016/j.jfluidstructs.2015.01.004.
  11. Kumar, S. R., Sharma, A. and Agrawal, A. (2008), "Simulation of flow around a row of square cylinders", J. Fluid. Mech., 606, 369-397. https://doi.org/10.1017/S0022112008001924.
  12. Saha, A.K., Biswas, G. and Muralidhar, K. (2003), "Three-dimensional study of flow past a square cylinder at low Reynolds numbers", Int. J. Heat Fluid Fl., 24(1), 54-66. https://doi.org/10.1016/S0142-727X(02)00208-4.
  13. Sewatkar, C.M., Sharma, A. and Agrawal, A. (2009), "On the effect of Reynolds number for flow around a row of square cylinders", Phys. Fluids, 21(8), 083602. https://doi.org/10.1063/1.3210769.
  14. Sharma, A. and Eswaran, V. (2004), "Heat and fluid flow across a square cylinder in the two-dimensional laminar flow regime", Numer. Heat T. A: Appl., 45(3), 247-269. https://doi.org/10.1080/10407780490278562.
  15. Sohankar, A., Norberg, C. and Davidson, L. (1999), "Simulation of three-dimensional flow around a square cylinder at moderate Reynolds numbers", Phys. Fluids, 11(2), 288-306. https://doi.org/10.1063/1.869879.
  16. Sumner, D., Wong, S., Price, S.J. and Paidoussis, M.P. (1999), "Fluid behaviour of side-by-side circular cylinders in steady cross-flow", J. Fluid. Struct., 13(3), 309-338. https://doi.org/10.1006/jfls.1999.0205.
  17. Sumner, D. (2010), "Two circular cylinders in cross-flow: a review", J. Fluid. Struct., 26(6), 849-899. https://doi.org/10.1016/j.jfluidstructs.2010.07.001.
  18. Younis, M.Y., Alam, M.M. and Zhou, Y. (2016), "Flow around two non-parallel tandem cylinders", Phys. Fluids, 28(12), 125106. https://doi.org/10.1063/1.4972549
  19. Zheng, Q. and Alam, M.M. (2017), "Intrinsic features of flow past three square cylinders in side-by-side arrangement", J. Fluid Mech., 826, 996-1033. https://doi.org/10.1017/jfm.2017.378.
  20. Zhou, Y. and Alam, M.M. (2016), "Wake of two interacting cylinders: a review", Int. J. Heat Fluid Fl., 62, 510-537. https://doi.org/10.1016/j.ijheatfluidflow.2016.08.008

Cited by

  1. Wind loads and wind-resistant behaviour of large cylindrical tanks in square-arrangement group. Part 2: CFD simulation and finite element analysis vol.31, pp.6, 2019, https://doi.org/10.12989/was.2020.31.6.495