Topics in Detached-Eddy Simulation

  • Philippe R. Spalart

5 Summary

DES has been rather successful and well-understood, and has not required any essential modification since its creation in 1997. However, perfection is not expected from any method in an endeavor as complex as the numerical prediction of turbulence, especially since the numerical power at the engineers’ disposal remains marginal for many “real-life” problems, and utterly insufficient for the rest. Therefore, RANS-LES hybrids will be helpful for many years, but user training and judgment will be essential as will experience sharing via publications. Not only is the approach imperfect, but it can be mis-used; in that sense, robustness almost becomes a liability. Fully solving the issue of ambiguous grids is a priority, but has proven to be a resilient difficulty. The RANS component also may be improved, with the usual emphasis on separation. Another welcome change would be a numerically efficient system to control laminar regions; a magnificent one would be to predict transition, within the Navier-Stokes solution and even in unstructured grids.


Eddy Viscosity Unstructured Grid RANS Model Suction Slot Grid Count 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Philippe R. Spalart
    • 1
  1. 1.Boeing Commercial AirplanesSeattleUSA

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