Advertisement

Computation of Complex Terrain Turbulent Flows Using Hybrid Algebraic Structure-Based Models (ASBM) and LES

  • C. Panagiotou
  • S. C. Kassinos
  • D. Grigoriadis
Conference paper
Part of the ERCOFTAC Series book series (ERCO, volume 23)

Abstract

In this work, we revisit the coupling of the Algebraic Structure-Based Model with popular two-equation eddy viscosity models (EVM). We consider both the \(v^{2}-f\) model and variants of the \(\kappa \)-\(\omega \) model. Our aim is to explore the role of the EVM in these couplings. Computations of turbulent boundary layer over a flat plate and a fully developed channel flow are initially performed for validation purposes. Then, the case of a 2D steep, smooth hill is considered, for which additional LES computations were performed in order to ascertain the validity of the experimental data. The coupling of the ASBM with the \(\kappa \)-\(\omega \)-BSL model (hereafter called ASBM-BSL) showed superior robustness when compared to the ASBM-\(v^{2}\)-f hybrid model. Moreover, ASBM-BSL captures the size of the recirculation bubble more accurately, and overall yields a noticeable improvement in the prediction of the turbulent statistics in the recirculation region. All models fail to capture the correct shear stress profile at the top of the hill, exhibiting positive, non-realizable values near the wall. The present comparisons reveal a sensitivity of the hybrid closures to the choice of carrier model.

Keywords

Large Eddy Simulation Recirculation Region Nonuniform Grid Recirculation Bubble Reynolds Stress Tensor 
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.

Notes

Acknowledgments

Support from the US Army International Technology Center and the US Air Force European Office of Aerospace Research and Development (EOARD) under grant W911NF-11-1-0425, and from the Republic of Cyprus through the Research Promotion Foundation Project \(\mathrm{KOY}\Lambda /\Sigma /0510/01\) is grateful acknowledged.

References

  1. 1.
    B. Aupoix, S. Kassinos, C. Langer, An easy access to the structure based model technology, in Sixth International Symposium on Turbulence and Shear Flow Phenomena, Seoul-Korea, 22–24 June 2009Google Scholar
  2. 2.
    J. Benton, Evaluation of \(v^{2}\)-f and ASBM turbulence models for transonic aerofoil RAE2822, in Proceedings of the WALLTURB International Workshop, Lille, France, 21–23 April (2009)Google Scholar
  3. 3.
    F. Ham, K. Mattson, G. Iaccarino, Accurate and stable finite volume operators for unstructured flow solvers. Annual Research Briefs, Center for Turbulence Research, NASA Ames/Stanford University, p. 522 (1996) (2006)Google Scholar
  4. 4.
    K. Iwamoto, Y. Suzuki, N. Kasagi, Fully developed 2-D channel flow (2012) http://www.thtlab.t.u-tokyo.ac.jp/DNS. Cited 25 May 2014
  5. 5.
    S.C. Kassinos, W.C. Reynolds, An extended structure-based model based on a stochastic eddy-axis evolution equation. Annual Research Briefs, Center for Turbulence Research, NASA Ames/Stanford University, pp. 133–148 (1995)Google Scholar
  6. 6.
    S.C. Kassinos, C.A. Langer, G. Kalitzin, G. Iaccarino, A simplified structure-based model using standard turbulence scale equations: computation of rotating wall-bounded flows. Int. J. Heat Fluid Flow 27, 653–660 (2006)CrossRefGoogle Scholar
  7. 7.
    S.C. Kassinos, W.C. Reynolds, A structure-based model for the rapid distortion of homogeneous turbulence. Technical Report TF-61, Mechanical Engineering Department, Stanford University (1994)Google Scholar
  8. 8.
    C.A. Langer, W.C. Reynolds, A new algebraic structure-based turbulence model for rotating wall-bounded flows. Technical Report TF-85, Mechanical Engineering Department, Stanford University (1994)Google Scholar
  9. 9.
    J. Loureiro, F. Pinho, A. Silva Freire, Near wall characterization of the flow over a two-dimensional steep smooth hill. Exp. Fluids 42, 441–457 (2007)CrossRefGoogle Scholar
  10. 10.
    T.S. Lund, X. Wu, K.D. Squires, Generation of turbulent inflow data for spatially-developing boundary layer simulations. J. Comput. Phys. 140, 233–258 (1998)MathSciNetCrossRefzbMATHGoogle Scholar
  11. 11.
    P. Moin, S.V. Apte, Large-eddy simulation of realistic gas turbine combustors. AIAA J. 44, 698–708 (2006)CrossRefGoogle Scholar
  12. 12.
    C. Panagiotou, S. Kassinos, The ASBM-SA turbulence closure: Taking advantage of structure-based modeling in current engineering CFD codes. Int. J. Heat Fluid Fl. 52, 111–128 (2015)Google Scholar

Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • C. Panagiotou
    • 1
  • S. C. Kassinos
    • 1
  • D. Grigoriadis
    • 1
  1. 1.Computational Science Laboratory UCY-CompSciUniversity of CyprusNicosiaCyprus

Personalised recommendations