Separation criteria for threedimensional boundarylayer calculations
Abstract
The behavior of the numerical solution of the boundarylayer equations for 3D viscous flow around streamlined objects in the vicinity of separationline singularities is investigated. The turbulent boundary layer on a 35deg swept wing of infinite span is analyzed using the finitedifferencemethod boundarylayer program described by Raven (1980) and a spanwisemarching approach. A discontinuity in the displacement thickness and other characteristics at the separation line is shown to produce a forbidden region within which the calculated results are grid dependent and may be physically meaningless. The use of local grid refinement to evaluate separation singularities and identify erroneous results is recommended.
 Publication:

AIAA Journal
 Pub Date:
 April 1984
 DOI:
 10.2514/3.8438
 Bibcode:
 1984AIAAJ..22..554R
 Keywords:

 Boundary Layer Equations;
 Computational Fluid Dynamics;
 Finite Difference Theory;
 Three Dimensional Boundary Layer;
 Turbulent Boundary Layer;
 Aircraft Structures;
 Pressure Distribution;
 Reynolds Number;
 Ship Hulls;
 Viscous Flow;
 Fluid Mechanics and Heat Transfer