International Journal of Aeronautical and Space Sciences

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Effect of the spanwise grid spacing and treatment of convection term in DES

  • Published : 2007.11.01
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Abstract

A two-dimensional backward facing step flow was comptuted using a Detached Eddy simulation(DES) based on the SST turbulence model. The expansion ratio(ER) was 1.125 and the Reynolds number based on the step height and the mean velocity in the upstream channel was 37,500. The flow condition was the same as with the experimental research[1]. The reattachment length, oscillatory characteristics of the flow and the coherent structures of the present simulation were compared to demonstrate the improtance of spanwise grid spacing.

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References

  1. Driver, D. M. and Seegmiller, H. L., Features of a Reattaching Turbulent Shear Layer in Divergent Channel Flow, AIAA Journal, Vol. 23, No. 2 pp. 163-171, 1985 https://doi.org/10.2514/3.48597
  2. Speziale, C.G., Turbulence modelling for time-dependent RANS and VLES: a review, AIAA Journal, Vol. 38, No. 2 pp. 173-183, 1998
  3. Girimaji, S. S., Partially Averaged Navier-Stokes model for turbulence AReynolds-Averaged Navier-Stokes to direct numerical simulation bridging method, Journal of Applied Mechanics, Vol. 73, pp. 413-421, 2006 https://doi.org/10.1115/1.2136921
  4. Spalart, P. R., Jou, W. H., Strelets, M., and Allmaras, S. R, Comments on the feasibility of LES for wings and on a hybrid RANS/LES approacb, Advances in DNS/LES:First AFOSR Int. Conf. on DNS/LES, Greyden, Columbus, 1997
  5. Strelets, M., Detached Eddy Simulation oh massively Separation Flows, AIAA paper, 2001-0879, 2001
  6. Spalart, P. R. and Allmaras, S. R., A one equation IJrbulence model for aerodynamics flows, AlAA paper, 1992-0439, 1992
  7. Menter, P. R., Zonal two-equation $k-\kappa$ turbulence models for aerodynamic flows, AIAA paper, 1993-2906, 1993
  8. Song, C. S. and Park, S. O., Assessment of URANS and DES for two-dimensional backward facing step flow, JSASS-KSAS Joint International Symposium on Aerospace Engineering, Nagoya, Japan, Oct, 2005
  9. NPARC Alliance CFD Verification and Validation Web Site (http://www.grc.nasa.gov/WWW/Wlild/valid/validation.html)
  10. Travin, A., Shur, M., Strelets, M., and Spalart, P. R., Physical and numerical upgrades in the detached-eddy simulation of complex turbulent flows. In:412 EUROMECH Colloquium on LES of Complex transitional and turbulent flows, Munich, Oct. 2000
  11. Yan, J., Mockett, C., and Thiele, F., Investigation of alrernative length scale substitutions in Detached Eddy Simulation, Flow, Turbulence and combustion, Vol. '74, pp. 85-102, 2005
  12. Neto, A. S., Grans, D., Metais, O and Lesieur, M., A numericl investigation of the coherent vortices in turbulence behind a backward facing step, Journal of Fluid Mechanics, Vol. 256, pp. 1-25, 1993 https://doi.org/10.1017/S0022112093002691
  13. Akselvoll, K. and Main, P., Large eddy simulation of turbulent confined coannular jets and turbulent flow over a backward facing step, Report No. TF-63, Stanford University, 1995
  14. Driver,. D. M., Seegmiller, H. L. and Marvin J. G., Time-Dependent Behavior of a Reattaching Shear Layer, AIAA Journal, Vol. 25, No. 7 pp. 914-919, 1987 https://doi.org/10.2514/3.9722
  15. Hunt, J. C. R., Wrat, A. A., and Main, P., Eddies, stream, and convergence zones in turbulent flows, in Proceedings of the 1988 Summer Program (CTR. Stanford,CA,1988), pp.193-208, 1988