The Buffer Layer Technique Applied to Transonic Flow Calculations

  • Jaroslaw Rachwalski
  • Franco Magagnato
  • Martin Gabi
Conference paper
Part of the Fluid Mechanics and its Applications book series (FMIA, volume 73)


The main goal of numerical simulations is to predict a flow field as close to the real one as possible. All disturbances which travel down to an inlet/outlet boundary of the domain should pass through the boundary. Unfortunately, the standard numerical boundary conditions produce unphysical reflections of the disturbances. This is especially undesirable for unsteady calculations. To avoid this effect, a non-reflecting boundary condition must be applied. According to recent papers, one can find some different approaches to avoid the unphysical reflections, called non-reflecting boundary conditions. One of those is the buffer layer technique. The buffer layer non-reflecting boundary, proposed by Freund3, has been implemented into our code10 and tested for various test cases.

Key words

non-reflecting boundary condition buffer layer technique transonic flow 


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  1. [1]
    Giles M. Non-reflecting boundary conditions for Euler equations. CFDL-TR-88-1, MIT Dept. of Aero. And Astro. 1988Google Scholar
  2. [2]
    Hayder M.E., Turkei E. Nonreflecting boundary conditions for jet flow computations. AIAA Journal 1995, Vol. 33, No. 12, 2264–2270ADSzbMATHCrossRefGoogle Scholar
  3. [3]
    Freund J.B Proposed inflow/outflow boundary condition for direct computation of aerodynamic sound. AIAA Journal 1997, Vol. 35, No. 4, 740–742ADSzbMATHCrossRefGoogle Scholar
  4. [4]
    Colonius T., Mohseni K., Freund J. B., Moin P. Evaluation of noise radiation mechanisms in a turbulent jet. Center for Turbulence Research, Proc. Of the Summer Program 1998, 159–167Google Scholar
  5. [5]
    Rowley C.W., Colonius T., Basu A.J. On self-sustained oscillations in two-dimensional compressible flow over rectangular cavities. J. Fluid Mech. 2002, Vol. 455, 315–346MathSciNetADSzbMATHCrossRefGoogle Scholar
  6. [6]
    Boersma B.J., Lele S.K. Large eddy simulation of compressible turbulent jets. Center for Turbulence Research, Annual Research Briefs 1999, 365–377Google Scholar
  7. [7]
    Ta’asan S., Nark D.M. An absorbing buffer zone technique for acoustic wave propagation. AIAA Paper 1995, 95–0146Google Scholar
  8. [8]
    Berenger J.P. A perfectly Matched Layer for the Absorption of Electromagnetic Waves. Journal of Computational Physics 1994, Vol. 114, No. 2, 185–200MathSciNetADSzbMATHCrossRefGoogle Scholar
  9. [9]
    Hu F.Q. On absorbing boundary conditions for linearized Euler equations by a perfectly matched layer. Inst, for Computer Applications in Science and Engineering 1995, Rept. 95–70, Hampton, VaGoogle Scholar
  10. [10]
    Magagnato F. KAPPA-Karlsruhe parallel program for aerodynamics. TASK quarterly 1998, Vol. 2, No. 2, 215–270Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2003

Authors and Affiliations

  • Jaroslaw Rachwalski
    • 1
  • Franco Magagnato
    • 1
  • Martin Gabi
    • 1
  1. 1.Fachgebiet StrömungsmachinenUniversität KarlsruheGermany

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