Separation criteria for three-dimensional boundary-layer calculations
Abstract
The behavior of the numerical solution of the boundary-layer equations for 3D viscous flow around streamlined objects in the vicinity of separation-line singularities is investigated. The turbulent boundary layer on a 35-deg swept wing of infinite span is analyzed using the finite-difference-method boundary-layer program described by Raven (1980) and a spanwise-marching 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