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High-Density Mesh Flow Computations by Building-Cube Method

  • Kazuhiro Nakahashi
  • LaeSung Kim
Conference paper

4 Conclusion

In this paper, an approach named Building-Cube Method, aimed for largescale computation on near-future advanced parallel computers, was applied to flow computations of two airfoils; RAE2822 airfoil at transonic speed and four-element airfoil at low Mach number. The method is based on the Cartesian mesh, and the local grid density is adapted to the flow characteristic length by changing the cube size. Equal spacing and equal number of Cartesian grid in each cube make it easy to parallelize the flow solver and to handle huge data output. The computed results showed detailed flow features near the airfoil surfaces owing to the high-density and isotropic mesh. The pressure coefficient distributions of the time-averaged result of the four-element airfoil showed good agreement with the experiment data. It is interesting that, with the high-density and isotropic mesh, the computations without turbulence models show reasonable results.

Keywords

Airfoil Surface Cartesian Mesh Cube Size MUSCL Scheme Transonic Speed 
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. 1.
    K. Nakahashi, Y. Ito, F. Togashi: Int. J. Numer. Meth. Fluids, 43, pp.769–783, 2003.zbMATHCrossRefGoogle Scholar
  2. 2.
    K. Nakahashi: Computational Fluid Dynamics 2002, Eds. S. Armfield, R. Morgan, K. Srinivas, (Springer, 2003) pp.77–81.Google Scholar
  3. 3.
    K. Nakahashi, LaeSung Kim: AIAA Paper 2004-0434, January 2004.Google Scholar
  4. 4.
    K. Nakahashi, K. Egami: Computers and Fluids, 19,3/4, 1991, pp.273–286.zbMATHCrossRefGoogle Scholar
  5. 5.
    S. Obayashi, G. P. Guruswamy: AIAA J. 33,6, 1995, pp.1134–1141.zbMATHCrossRefGoogle Scholar
  6. 6.
    S. Yamamoto, H. Daiguji: Computer and Fluids, 22,2/3, 1993, pp.259–270.zbMATHMathSciNetCrossRefGoogle Scholar
  7. 7.
    K. Matsuno: Computer and Fluids, 22,2/3, 1993, pp.311–322.zbMATHMathSciNetCrossRefGoogle Scholar
  8. 8.
    P. H. Cook, M. A. McDonald, M. C. P. Firmin: AGARD-AR-138, 1979.Google Scholar
  9. 9.
    E. Omar, T. Zierten, M. Habn, E. Szpiro, and A. Mabal: NASA CR-2215, 1979.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Kazuhiro Nakahashi
    • 1
  • LaeSung Kim
    • 1
  1. 1.Department of Aerospace EngineeringTohoku UniversitySendaiJapan

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