Wind and Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

A numerical study of the turbulent fluctuating flow around a square cylinder for different inlet shear

  • Islam, A.K.M. Sadrul (Department of Mechanical Engineering, Bangladesh University of Engineering & Technology) ;
  • Hasan, R.G.M. (Computational Modelling Section, Health & Safety Laboratory)
  • Published : 2002.02.25
⟨ Previous Next ⟩

Abstract

This paper reports the numerical calculations of uniform turbulent shear flow around a square cylinder. The predictions are obtained by solving the two-dimensional unsteady Navier-Stokes equations in a finite volume technique. The turbulent fluctuations are simulated by the standard $k-{\varepsilon}$ model and one of its variant which takes care of the realizability constraint in order to suppress the excessive generation of turbulence in a stagnation condition. It has been found that the Strouhal number and the mean drag coefficient are almost unaffected by the shear parameter but the mean lift coefficient is increased. The present predictions are compared with available experimental data.

Keywords

References

  1. Ayukawa, K., Kawasaki, N., Ohkura, M. and Asano, R. (1985), "Rectangular cylinder in a shear flow", Trans. JSME, 51-472, 3887-3894.
  2. Ayukawa, K., Ochi, J., Kawahara, G. and Hirao, T. (1993), "Effects of shear rate on the flow around a square cylinder in a uniform shear flow", J. Wind Eng. Ind. Aerod., 50, 97-106. https://doi.org/10.1016/0167-6105(93)90065-V
  3. Bailly, P., Champion, M. and Garreton, D. (1995), "Numerical study of a combustion zone stabilized by a rectangular cylinder", 10th Symp. Turbulent Shear Flows, Penn., 19-24.
  4. Behnia, M., Parneix, S. and Durbin, P. (1996), "Simulation of jet impingement heat transfer with the $k-{\varepsilon}-v^2$ model", Ann. Res. Briefs, Centre for Turbulence Research, Stanford University, USA.
  5. Durbin, P.A. (1996), "On the $k-{\varepilon}$ stagnation point anomaly", Int. J. Heat and Fluid Flow, 17, 89-90. https://doi.org/10.1016/0142-727X(95)00073-Y
  6. Hasan, R.G.M. and McGuirk J.J. (2001), "Assessment of turbulence-transport models for transonic flow over an axisymmetric bump", The Aeronautical J., 105, (1043), 17-31. https://doi.org/10.1017/S0001924000095944
  7. Hwang R.R. and Sue Y.C. (1997), "Numerical simulation of shear effect on vortex shedding behind a square cylinder", Int. J., Num. Meth. Fluids, 25, 1409-1420. https://doi.org/10.1002/(SICI)1097-0363(19971230)25:12<1409::AID-FLD622>3.0.CO;2-N
  8. Islam, A.K.M.S. (1997), "Prediction of vortex shedding behind bluff bodies", Report No. TT9701, Dept. of Aero Auto Eng., Loughborough University, UK, (ISBN 0 904947 49 1).
  9. Kiya, M., Hisataka, T. and Arie, M. (1980), "Vortex shedding from a circular cylinder in moderate Reynolds number shear flow", J. Fluid Mechanics, 141, 721-735.
  10. Kwon, T.S., Hyung, J.S. and Hyun, J.M. (1992), "Experimental investigation of uniform shear flow past a circular cylinder", J. Fluids Eng., ASME, 114, 457-460. https://doi.org/10.1115/1.2910053
  11. Little, A.R. and Manners, A.P. (1993), "Predictions of the pressure losses in 2D and 3D model dump diffusers", ASME Paper 93-GT-184.
  12. Murakami, S. and Mochida, A. (1995), "On turbulent vortex shedding flow past 2D square cylinder predicted by CFD", J. Wind Eng. Ind. Aerod., 54, 191-211.
  13. Rodi W. (1997) , "Comparison of LES and RANS calculations of the flow around bluff bodies", J. Wind Eng. Ind. Aerdy., 69-71, 55-75. https://doi.org/10.1016/S0167-6105(97)00147-5
  14. Saha, A.K., Biswas, G. and Muralidhar, K. (1999), "Influence of inlet shear on structure of wake behind a square cylinder", J. Engineering Mechanics, ASCE, 125, 359-363. https://doi.org/10.1061/(ASCE)0733-9399(1999)125:3(359)
  15. Speziale, C.G. (1991), "Analytical methods for the development of Reynolds-stress closures in turbulence", Ann. Rev. Fluid Mechanics, 23, 107-157. https://doi.org/10.1146/annurev.fl.23.010191.000543