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Computing non-equilibrium turbulent flows with time-dependent rans and vles

  • Charles G. Speziale
Algorithms Numerical Techniques
Part of the Lecture Notes in Physics book series (LNP, volume 490)

Abstract

The computation of complex non-equilibrium turbulent flows is discussed from a basic theoretical standpoint. An entirely new approach to time-dependent Reynolds-Averaged Navier-Stokes (RANS) computations and Very Large-Eddy Simulations (VLES) is presented. The unique feature of this new approach is that subgrid scale models are proposed that allow a DNS to go continuously to a RANS computation in the coarse mesh/infinite Reynolds number limit. In between these two limits, we have an LES or VLES. Furthermore, the Reynolds stress model that is ultimately recovered in the coarse mesh limit has built in non-equilibrium features that make it suitable for time-dependent RANS. The fundamental technical issues associated with this new approach are discussed in detail and a few illustrative calculations are presented to amplify the central points of the paper.

Keywords

Turbulent Kinetic Energy Reynolds Stress Reynolds Stress Model Subgrid Scale Model Relaxation Time Approximation 
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.

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References

  1. Bardina, J., Ferziger, J. H. and Reynolds, W. C., 1983. Stanford University Technical Report No. TF-19.Google Scholar
  2. Clark, R. A., Ferziger, J. H. and Reynolds, W. C., 1979, J. Fluid. Mech. 91, 1.zbMATHCrossRefADSGoogle Scholar
  3. Gatski, T. B. and Speziale, C. G., 1993. J. Fluid Mech. 254, 59.zbMATHCrossRefADSMathSciNetGoogle Scholar
  4. Germano, M., Piomelli, U., Moin, P. and Cabot, W. H. 1991. Phys. Fluids 3, 1760.zbMATHCrossRefADSGoogle Scholar
  5. Pope, S. B., 1975. J. Fluid Mech. 72, 331.zbMATHCrossRefADSGoogle Scholar
  6. Smagorinsky, J., 1963. Mon. Weather Review 91, 99.CrossRefADSGoogle Scholar
  7. Speziale, C. G., 1987. J. Fluid Mech. 178, 459.zbMATHCrossRefADSGoogle Scholar
  8. Speziale, C. G., 1991. Ann. Rev. Fluid Mech. 23, 107.CrossRefADSMathSciNetGoogle Scholar
  9. Speziale, C. G., 1996. 20th Symposium on Naval Hydrodynamics, p. 835, Nat. Acad. Press.Google Scholar
  10. Speziale, C. G. and Abid, R., 1995. AIAA J. 33, 1974.CrossRefADSGoogle Scholar
  11. Speziale, C. G. and Xu, X. H., 1996. Int. J. Heat & Fluid Flow, to appear.Google Scholar
  12. Speziale, C. G., Sarkar, S. and Gatski, T. B., 1991. J. Fluid Mech. 227, 245.zbMATHCrossRefADSGoogle Scholar
  13. Yoshizawa, A., 1984. Phys. Fluids 27, 1377.zbMATHCrossRefADSGoogle Scholar

Copyright information

© Springer-Verlag 1997

Authors and Affiliations

  • Charles G. Speziale
    • 1
  1. 1.Aerospace & Mechanical Engineering DepartmentBoston UniversityBoston

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