Structure of the Vorticity Field in a Plane Free Shear-Layer

  • J. C. Lasheras
  • T. Maxworthy


A plane isothermal free shear layer between two streams of reactive solutions has been investigated to moderate Reynolds numbers (102). Both Laser Induced Fluorescence and a Direct Interface Visualization were used to monitor the interface between the two fluids. The structure of the vorticity field was then investigated through an analysis of the evolution of the position of the interface over time.

The response of the plane, shear layer to localized three dimensional disturbances of varying magnitude in the upstream conditions was investigated. The results show that the streamwise vortical structure is sensitive to localized perturbations while the large scale spanwise structure is relatively insensitive to this type of forcing.

In addition, the interaction of a plane, free shear layer with vertical solid boundaries was also studied. It was found that this interaction with the side walls leads to the generation of streamwise vortices which spread laterally by self-induction.


Shear Layer Vortical Structure Streamwise Vortex Splitter Plate Streamwise Vorticity 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1987

Authors and Affiliations

  • J. C. Lasheras
    • 1
  • T. Maxworthy
    • 1
  1. 1.Department of Mechanical EngineeringUniversity of Southern CaliforniaLos AngelesUSA

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