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An Adaptive Operator Technique for Hypersonic Flow Simulation on Parallel Computers

  • Ioannis St. Doltsinis
  • Jürgen Urban
Part of the Notes on Numerical Fluid Mechanics (NNFM) book series (NONUFM, volume 48)

Abstract

The aerodynamics of reentry vehicles raised to the authors a number of tasks related to the physical modeling and the numerical simulation of chemically reacting hypersonic viscous flows [1, 2, 3]. An incorporation of real gas effects into the numerical simulation necessitates enormous computer capacity and demands an enhanced efficiency of the numerical computation as well as the introduction of parallel processing. For this purpose, a specific adaptive method is presented aiming at a reduction of the number of numerical operations, and a parallel algorithm is described. In connection with parallel processing, the adaptive method is seen to cause an uneven distribution of numerical operations among the processors. In order to avoid idle-times on any processing unit, a dynamic re-distribution technique has been conceived and investigated.

Keywords

Execution Time Convective Transport Hypersonic Flow Interior Boundary Numerical Operation 
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]
    J. Argyris, I.St. Doltsinis, H. Friz. Hermes Space Shuttle: Exploration of reentry aerodynamics. Comp. Meth. Appl Mech. Eng., 73:1–51, 1989.zbMATHCrossRefGoogle Scholar
  2. [2]
    J. Argyris, I.St. Doltsinis, H. Friz, J. Urban. An exploration of chemically reacting viscous hypersonic flows. Comp. Meth. Appl. Mech. Eng., 89, 85–128, 1991.CrossRefGoogle Scholar
  3. [3]
    J. Argyris, I.St. Doltsinis, H. Friz, J. Urban. Physical and computational aspects of chemically reacting hypersonic flows. Comp. Meth. Appl. Mech. Eng., 111, 1–35, 1994.zbMATHCrossRefGoogle Scholar
  4. [4]
    J. Argyris, H. Friz, F. Off. Domain decomposition and operator splitting for parallel finite element computations of viscous real gas flows. Notes on Numerical Fluid Mechanics, Vol. 38, Vieweg, Braunschweig, 1993.Google Scholar
  5. [5]
    E. Laurin, J. Wiesbaum. Three-dimensional numerical simulation of the aerothermo-dynamic reentry. Notes on Numerical Fluid Mechanics, in this publication.Google Scholar
  6. [6]
    S. Brück, B. Brenner, D. Rues, D. Schwamborn. Investigations of hypersonic imulation of the aerothermodynamic reentry. Notes on Numerical Fluid Mechanics, in this publication.Google Scholar
  7. [7]
    J. Argyris, I.St. Doltsinis, J. Urban. Adaptive application of physical operators in hypersonic flow computation. ERCOFTAC bulletin, 21:28–29, 1994.Google Scholar
  8. [8]
    I.St. Doltsinis, S. Nölting. Generation and decomposition of finite element models for parallel computations. Computing Systems in Engineering, 2:427–449, 1992.CrossRefGoogle Scholar
  9. [9]
    H. Friz, S. Nölting. Towards an integrated parallelization concept in computational fluid dynamics. ERCOFTAC bulletin, 18:8–11, 1993.Google Scholar
  10. [10]
    J. Argyris, H.U. Schlageter. A parallel interactive and integrated visualization system. Notes on Numerical Fluid Mechanics, in this publication.Google Scholar
  11. [11]
    D. Straub. Exakte Gleichungen für die Transportkoeffizienten eines Fünfkomponentengemisches als Modellgas dissoziierter Luft. DLR-FB 72-34, 1972.Google Scholar
  12. [12]
    H.G. Hornung. Non-equilibrium dissociating nitrogen flow over spheres and circular cylinders. J. Fluid Mechanics, Vol.53, Part 1, 1972.Google Scholar

Copyright information

© Friedr. Vieweg & Sohn Verlagsgesellschaft mbH, Braunschweig/Wiesbaden 1996

Authors and Affiliations

  • Ioannis St. Doltsinis
    • 1
  • Jürgen Urban
    • 1
  1. 1.Institute for Computer ApplicationsUniversity of StuttgartStuttgartGermany

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