Evaluation of sub grid scale and local wall models in Large-eddy simulations of separated flow (original) (raw)

Abstract

The performance of the Sub Grid Scale models is studied by simulating a separated flow over a wavy channel. The first and second order statistical moments of the resolved velocities obtained by using Large-Eddy simulations at different mesh resolutions are compared with Direct Numerical Simulations data. The effectiveness of modeling the wall stresses by using local log-law is then tested on a relatively coarse grid. The results exhibit a good agreement between highly-resolved Large Eddy Simulations and Direct Numerical Simulations data regardless the Sub Grid Scale models. However, the agreement is less satisfactory with relatively coarse grid without using any wall models and the differences between Sub Grid Scale models are distinguishable. Using local wall model retuned the basic flow topology and reduced significantly the differences between the coarse meshed Large-Eddy Simulations and Direct Numerical Simulations data. The results show that the ability of local wall model to predict the separation zone depends strongly on its implementation way.

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References (28)

  1. -W. Cabot, P. Moin, Flow Turb. Combust 63, 269-291 (2000) E3S Web of Conferences
  2. Piomelli, E. Balaras, Annu. Rev. Fluid Mech. 34, 349-74 (2002)
  3. -W. Deardorff, J. Fluid Mech. 41, 453-465 (1970)
  4. Schumann, annuli. J. Comp. Phys. 18, 376-404 (1975)
  5. -G. Grötzbach, Encyclopedia of Fluid Mechanics 6 (1987)
  6. Piomelli, J. Ferziger, P. Moin, J. Kim, Phys. Fluids 1, 1061-1068(1989)
  7. -J. Mason, S.Callen, J. Fluid Mech. 162,349-462 (1986)
  8. -F. Wan, F. Porté-Agel, R. Stoll, Atmos. Environ. 41,2719-2728 (2007)
  9. Sullivan, J. Edson, T. Hristov, J. McWilliams, J. Atmos. Sci. 65, 1225-1245(2008)
  10. -M. Churchfield, S. Patrick, J. Moriarty, ITM Web of Conferences 2, 02001 (2014)
  11. -A. Al Sam, R. Szasz, J. Revstedt, ITM Web of Conferences 2, 01003 (2014)
  12. -W. Cabot, J. Jimenez, J. Baggett, Annual Research Briefs, 353-342 (1999)
  13. -F. Nicoud, J. Bagett, P. Moin, W. Cabot, Phys. Fluids 13, 2968-2984 (2001) 14-The OpenFOAM Foundation., http:://www.openfoam.org
  14. -J. Smagorinsky, Monthly Weather Review 91, 99-164 (1963)
  15. -K. Horiuti, J. Phys. Soc. Japan 54, 2855-2865 (1985)
  16. -M. Germano, U. Piomelli, P. Moin, W. Cabot, Phys. Fluids 3, 1760(1991)
  17. -C. Meneveau, T. Lund, W. Cabot, J. Fluid Mech. 319, 353-385 (1996)
  18. -F. Porté-Agel, C. Meneveau B. Parlange, J. Fluid Mech. 415,261-284 (2000)
  19. -P. Moin, J. Kim, J. Fluid Mech.118, 341-377 (1982)
  20. -J. Mason, J. Thomson, J. Fluid Mech. 242, 51-78 (1992)
  21. -W. Deardorff, J. Fluid Engng.,+ 429-438 (1973)
  22. -P. Sagaut, Large Eddy simulation of incompressible flows 3 rd ,(2006)
  23. -T. Foken, Bound. Layer Meteor. 119, 431-447 (2006)
  24. -R. van Driest J. Aero. Sci. 23, 1007-1011 (1956)
  25. -P. Spalart, W. Jou, M. Stretlets, S. Allmaras, First AFOSR International Conference on DNS/LES (1997)
  26. -D. Spalding, J. Fluid Mech. 27,(1967)
  27. -C. Maass, U. Schumann, In flow Simulation with high performance computers 52, 227- 241(1996)
  28. -D. Lilly, NCAR Manuscript 123,(1966)