On the Internal Order and Structures in a Transitional Spot

  • M. Sokolov
  • R. A. Antonia
  • R. Sankaran
Conference paper


A transitional (laminar to turbulent) spot which develops on a slightly heated laminar boundary layer is investigated. Flow structures of nearly the same scale as the spot have been identified within the spot. The number of structures in the spot increases with streamwise distance, however all structures are convected with the same velocity. This convection velocity depends on the normalized distance from the wall and is almost identical to that of the leading edge of the spot. The increase in the number of structures accounts for the streamwise growth of the spot. There is sufficient evidence to suggest that, the new structures are formed near the trailing edge of the spot.


Laminar Boundary Layer Convection Velocity Wire Array Hairpin Vortex Turbulent Spot 
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Copyright information

© Springer-Verlag Berlin, Heidelberg 1989

Authors and Affiliations

  • M. Sokolov
    • 1
  • R. A. Antonia
    • 2
  • R. Sankaran
    • 2
  1. 1.Department of Fluid Mechanics and Heat TransferTel-Aviv UniversityTel-AvivIsrael
  2. 2.Department of Mechanicl EngineeringUniversity of NewcastleAustralia

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