Twodimensional unsteady boundary layers with separation
Abstract
An introduction is presented to the calculation of twodimensional unsteady boundary layer flows with separation. Some results of basic calculations of this type are given. Numerical difficulties encountered while solving the boundary layer equations are shown to be minimized when the basic equations are handled in the Lagrangian form. This approach also assures that CourantFriedrichLewy condition is always fulfilled in reverse flow regions. In the Lagrangian coordinate system, the separation is clearly defined as a concentration of masses and a singularity in the system of equations is defined as a stationary point in the Lagrangiandependent space coordinates in the flow direction. The presence of a singularity in the boundary layer equations is discussed.
 Publication:

Forschung im Ingenieurwesen
 Pub Date:
 1991
 Bibcode:
 1991F&I....57....8S
 Keywords:

 Boundary Layer Separation;
 Boundary Layer Stability;
 Two Dimensional Boundary Layer;
 Unsteady Flow;
 Boundary Layer Equations;
 Lagrange Coordinates;
 Singularity (Mathematics);
 Fluid Mechanics and Heat Transfer