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Direct Numerical Simulation of Non-Linear Transitional Stages in an Experimentally Investigated Laminar Separation Bubble

In: High Performance Computing in Science and Engineering’ 05

Author

Listed:
  • Olaf Marxen

    (Universität Stuttgart, Institut für Aerodynamik und Gasdynamik)

  • Ulrich Rist

    (Universität Stuttgart, Institut für Aerodynamik und Gasdynamik)

Abstract

Summary This paper details a joint numerical and experimental effort to investigate a transition process in a laminar separation bubble, with the emphasis being put on the numerical contribution. A laminar separation bubble is formed if a laminar boundary layer separates in a region of adverse pressure gradient on a flat plate and undergoes transition, leading to a reattached turbulent boundary layer. Development of disturbances during the transition process in such a separation bubble is studied by means of direct numerical simulation with controlled disturbance input. Focus is put on the stage of non-linear development of these perturbations, for which a detailed comparison between numerical and experimental results is given. Beside physical phenomena like shear-layer roll-up and vortex shedding, computational aspects such as the performance of the numerical code on supercomputers are treated.

Suggested Citation

  • Olaf Marxen & Ulrich Rist, 2006. "Direct Numerical Simulation of Non-Linear Transitional Stages in an Experimentally Investigated Laminar Separation Bubble," Springer Books, in: Wolfgang E. Nagel & Michael Resch & Willi Jäger (ed.), High Performance Computing in Science and Engineering’ 05, pages 103-117, Springer.
    • Handle: RePEc:spr:sprchp:978-3-540-29064-3_8
    DOI: 10.1007/3-540-29064-8_8
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