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Direct Numerical Simulation of a Short Laminar Separation Bubble and Early Stages of the Bursting Process

  • Olaf Marxen
  • Dan Henningson
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design (NNFM) book series (NNFM, volume 96)

Abstract

Direct numerical simulation of a pressure-induced short laminar separation bubble developing on a flat plate has been carried out. Transition in this bubble was triggered by small disturbance input with a fixed frequency and fixed spanwise wave number. The resulting short bubble was shown to be converged in time to a statistically steady state, while possessing essential features of short laminar separation bubbles as reported in the literature. In the present case disturbance input is required to maintain a short bubble. Switching off this disturbance input yields a growing separation bubble. This phenomenon is denoted as bubble bursting, since indication is found that the bubble develops towards a long-bubble state.

Keywords

Direct Numerical Simulation Streamwise Velocity Separation Bubble Disturbance Input Linear Stability Theory 
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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Copyright information

© Springer-Verlag Berlin Heidelberg 2007

Authors and Affiliations

  • Olaf Marxen
    • 1
  • Dan Henningson
    • 1
  1. 1.Department of MechanicsRoyal Institute of Technology (KTH)StockholmSweden

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