Wave Models for Unsteady Separation and Jets

  • G. E. A. Meier
  • K. Ehrenfried
  • G. Grabitz
  • M. Rein
Part of the International Union of Theoretical and Applied Mechanics book series (IUTAM)

Abstract

The unsteady behaviour of separation and jets is explained in terms of the propagation and amplification of waves. The formation of waves on the boundaries of separation and jets is often caused by an instability of the Kelvin Helmholtz type. Kinematic waves, however, also lead to an amplification of deformations of the boundaries. Kinematic waves are inherent to dynamic processes as the Kelvin Helmholtz instability, but they can also occur independently. In addition acoustic waves often close feedback loops of self-excited oscillations.

Keywords

Entropy 

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Copyright information

© Springer-Verlag, Berlin Heidelberg 1991

Authors and Affiliations

  • G. E. A. Meier
    • 1
  • K. Ehrenfried
    • 1
  • G. Grabitz
    • 1
  • M. Rein
    • 1
  1. 1.Max-Planck-Institut für StrömungsforschungGöttingenGermany

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