A Two Dimensional Model of Pattern Evolution in Mixing Layers

  • R. Yang
  • P. Huerre
  • P. Coullet
Part of the NATO ASI Series book series (NSSB, volume 237)


The evolution of coherent structures in shear layers and wakes provides a particularly simple example of pattern dynamics in open spatially-developing non-equilibrium sys­tems. As in closed flows such as Rayleigh-Bénard convection, one observes a wealth of possible flow configurations involving dislocations, periodic arrays of vortices with distinct orientation, quasi-two dimensional vortical arrangements, etc. However, in contrast with Rayleigh-Bénard convection, the presence of a basic shear lifts the ori­entational degeneracy: vortices tend to remain more or less perpendicular to the flow direction.


Periodic Array Dislocation Nucleation Vertical Vorticity Spanwise Vortex Galilean Invariance 
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Copyright information

© Plenum Press, New York 1990

Authors and Affiliations

  • R. Yang
    • 1
  • P. Huerre
    • 1
  • P. Coullet
    • 2
  1. 1.Department of Aerospace EngineeringUniversity of Southern CaliforniaLos AngelesUSA
  2. 2.Laboratoire de Physique Théorique Parc ValroseUniversité de NiceNiceFrance

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