FLOW SEPARATION

The calculation of laminar separation has always represented one of the most relevant problems of boundary layer theory, even within the classical Prandtl's assumption of vanishing transverse pressure gradients. However, the validity of this assumption is in question not only in certain problems of supersonic separation where the classical theory cannot provide an answer, but also in the simplest incompressible problems. Recent theories attempting to calculate separation after relaxing Prandtl's assumption are reviewed in this paper. Purely numerical results based on the finite difference solution of the complete Navier-Stokes equations were considered to be beyond the scope of this review and are just briefly mentioned. An analytical procedure based on multiple layer treatment is discussed. A third procedure of interest is the generalization of von Karman momentum integral procedure taking into account the existance of transverse pressure gradients.

  • Supplemental Notes:
    • Presented at the AGARD Fluid Dynamics Panel Symposium, Gottingen, Germany, May 27-30, 1975. Published as a supplement to the Conference Proceedings. See also AD-A020001, NATO Furnished.
  • Corporate Authors:

    Advisory Group Aerospace Research and Development

    7 Rue Ancelle
    92 Neuilly-sur-Seine,   France 
  • Authors:
    • Crocco, L
  • Publication Date: 1976-2

Media Info

  • Pagination: 42 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00139907
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: AGARD-CP168-Suppl
  • Files: TRIS
  • Created Date: Oct 6 1976 12:00AM