Advertisement

Comparison of Hybrid RANS-LES Methods for Massively Separated Flows

  • Naveed Durrani
  • Ning Qin
Conference paper
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 117)

Abstract

The numerical analysis of massively separated flow around a circular cylinder at a high Reynolds number is presented in this paper. The simulations are carried out using the hybrid RANS-LES simulations, namely detached-eddy simulation (DES) and its modified version, delayed detached-eddy simulation (DDES). The computed pressure and skin friction coefficients around the surface of the circular cylinder are compared with the available experimental data and other numerical studies with encouraging results. The power spectral density (PSD) comparison of DES and DDES is carried out in the region with high vortex shedding and the energy spectrum depicts the energy cascade in line with the Kolmogorov -5/3 theory for both DES and DDES results. It is found that these hybrid RANS-LES simulation techniques are able to simulate the flow physics of the massively separated flows reasonably well. For such type of flows, the results of the modified scheme DDES are similar to the DES simulation with no adverse effects on the quality of the predicted flow field. The additional computational cost of DDES in comparison with DES is also addressed.

Keywords

Large Eddy Simulation Circular Cylinder High Reynolds Number Skin Friction Coefficient Vorticity Magnitude 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Travin, A., Shur, M., Strelets, M., Spalart, P.: Detached-Eddy Simulation past a Circular Cylinder. Journal of Flow, Turbulence and Combustion 63, 269–291 (1999)Google Scholar
  2. Cantwell, B., Coles, D.: An experimental study of entrainment and transport in the turbulent near wake of a circular cylinder. Journal of Fluid Mechanics 136, 321–374 (1983)CrossRefGoogle Scholar
  3. Cokljat, D., Liu, F.: DES of turbulent flow over an airfoil at high incidence. In: 40th Aerospace Sciences Meeting and Exhibit, AIAA paper 2002-0590, Reno, January 14-17 (2002)Google Scholar
  4. Achenbach, E.: Distribution of Local Pressure and Skin Friction around a Circular Cylinder in Cross-Flow up to Re = 5×106. Journal of Fluid Mechanics 34(4), 625–639 (1968)CrossRefGoogle Scholar
  5. Karypis, G., Kumar, V.: User Manual of METIS: A Software Package for Partitioning Unstructured Graphs, Partitioning Meshes and Computing Fill-Reduced Orderings of Sparse Matrices, Version 4.0. University of Minnesota (1998)Google Scholar
  6. Houghton, E.L., Carpenter, P.W.: Aerodynamics for Engineering Students. Butterworth-Heinemann, An Imprint of Elsevier Science (2003) ISBN 0 7506 5111 3Google Scholar
  7. Dacles-Mariani, J., Zilliac, G.G., Chow, J.S., Bradshaw, P.: Numerical/Experimental Study of a Wingtip Vortex in the Near Field. AIAA Journal 33(9), 1561–1568 (1995)CrossRefGoogle Scholar
  8. Squires, K.D., Forsythe, J.R., Morton, S.A., Grismer, M.J., Spalart, P.R.: Progress on Detached-Eddy Simulation of Massively Separated Flows. AIAA Paper 2002-1021 (2002)Google Scholar
  9. Menter, F.R., Kuntz, M.: Adaptation of Eddy Viscosity Turbulence Models to Unsteady Separated Flow Behind Vehicles. In: McCallen, R., Browand, F., Ross, J. (eds.) Symposium on “The Aerodynamics of Heavy Vehicles: Trucks, Busses, and Trains”, Monterey, USA, December 2-6. Springer, Heidelberg (2004)Google Scholar
  10. Shur, M., Spalart, P.R., Strelets, M., Travin, A.: Detached-eddy simulation of an airfoil at high angle of attack. In: Proceedings of the 4th International Symposium on Engineering Turbulence Modelling and Measurements, Corsica, May 24-26, pp. 669–678. Elsevier, Amsterdam (1999)Google Scholar
  11. Durrani, N.I.: Hybrid RANS-LES Simulations for Separated Flows Using Dynamic Grids. Ph. D. thesis, University of Sheffield, UK (March 2009)Google Scholar
  12. Norberg, C.: Flow Around A Circular Cylinder: Aspects of Fluctuating Lift. Journal of Fluids and Structures 15(3-4), 459–469 (2001)CrossRefGoogle Scholar
  13. Qin, N., Xia, H.: Detached eddy simulation of a synthetic jet for flow control. Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 222(5), 373–380 (2008)CrossRefGoogle Scholar
  14. Nunen, J.V.: Pressure and Forces on a Circular Cylinder in a Cross flow at High Reynolds Numbers. In: Flow Induced Structural Vibrations, pp. 748–754. Springer, Berlin (1974)CrossRefGoogle Scholar
  15. Spalart, P.R., Allmaras, S.R.: A One-Equation Turbulence Model for Aerodynamic Flows. AIAA Paper 92-0439 (January 1992)Google Scholar
  16. Spalart, P.R.: Detached-Eddy Simulation. Annu. Rev. Fluid Mech. 41, 181–202 (2009)CrossRefGoogle Scholar
  17. Roshko, A.: Experiments on the Flow past a Circular Cylinder at Very High Reynolds Number. Journal of Fluid Mechanics 10(3), 345–356 (1961)zbMATHCrossRefGoogle Scholar
  18. Spalart, P.R., Jou, W.-H., Strelets, M., Allmaras, S.R.: Comments on the Feasibility of LES for Wings and on a Hybrid RANS/LES Approach. In: Advances in DNS/LES, 1st AFOSR Int. Conf. on DNS/LES, August 4-8. Greyden Press, Columbus (1997)Google Scholar
  19. Spalart, P., Deck, S., Shur, M., Squires, K., Strelets, M.K., Travin, A.: A New Version of Detached-Eddy Simulation, Resistant to Ambiguous Grid Densities. In: Theoretical and Computational Fluid Dynamics, 0935-4964, pp. 181–195 (July 2006)Google Scholar
  20. Squires, K.D., Krishnan, V., Forsythe, J.R.: Prediction of the flow over a circular cylinder at high Reynolds number using detached-eddy simulation. Journal of Wind Engineering and Industrial Aerodynamics, 1528–1536 (2008)Google Scholar
  21. Zdravkovich, M.M.: Flow Around Circular Cylinders. Oxford University Press Inc., New York (1997)zbMATHGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Naveed Durrani
    • 1
  • Ning Qin
    • 1
  1. 1.Department of Mechanical EngineeringUniversity of SheffieldSheffieldUK

Personalised recommendations