Applied Mathematics and Mechanics

, Volume 16, Issue 4, pp 383–389 | Cite as

Secondary instability of large scale structure in free turbulent shear layer

  • Zhao Geng-fu


The secondary instability theory is used to study the behavior of spatially growing disturbance in free turbulem shear layer. The numerical results indicate that secondary instability of subharmonic mode shows a strong choice of spanwise wavenumber and the maximum growth rate occurs in two dimensional case. In contrast to that secondary instabilities of the fundamental mode occur in a wide scope of spanwise wavenumber. We have found so called translative instability at β=0 and bifurcation phenomenon for an amplitude of the KH wave larger than 0.06.

Key words

secondary instability large scale structure bifurcation 


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Copyright information

© Shanghai University of Technology (SUT) 1995

Authors and Affiliations

  • Zhao Geng-fu
    • 1
  1. 1.Tianjin UniversityTianjinP.R. China

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