NUMERICAL SOLUTION OF TURBULENT BOUNDARY LAYERS APPROACHING SEPARATION

The basis for the work described here is the experimental evidence of Kline, Brodkey, and others that indicates there is an identifiable vorticity structure in both space and time in the viscous wall layer. The primary results of these experiments which are important to a mathematical modeling are the identification of longitudinal turbulent streaks which are (1) three-dimensional, but statistically determinant in the spanwise direction, (2) time-dependent with a measurably periodic 'burst' frequency, and (3) a phenomenon which may be characterized as longitudinal vortices undergoing diffusion, convection, and stretching. Using these observations as a basic foundation, an analysis of the instantaneous velocity components in the turbulent wall layer is developed.

  • Supplemental Notes:
    • Also published in International Conference (4th) on Numerical Methods Fluid Dynamics, 24-28 Jan. 74, Boulder, Colo.
  • Corporate Authors:

    Purdue University

    School of Aeronautics and Astronautics
    West Lafayette, IN  USA  47907
  • Authors:
    • Abbott, D E
    • Walker, JDA
    • York, R E
  • Publication Date: 1974

Media Info

  • Pagination: 8 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00127454
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: AFOSR-TR-75-1005
  • Contract Numbers: AF-AFOSR-2707-74
  • Files: TRIS
  • Created Date: Dec 3 1975 12:00AM