Twoequation turbulence modeling of oscillatory boundary layers
Abstract
Three timedependent turbulent boundary layer problems are treated using a kepsilon turbulence model. The flows are characterized by large pressure gradients and either reversing or rotating wall shear stress vectors. Two existing and one new nearwall formulations are tested. The computed results are compared with data from Direct Numerical Simulations of the same flows. In one case previously unpublished DNSdata are given. It is found that the kepsilon model can provide good predictions for the wall shear as well as profiles of velocities, turbulent kinetic energy, and dissipation. The crucial part is the choice of nearwall terms.
 Publication:

AIAA, Aerospace Sciences Meeting
 Pub Date:
 January 1990
 Bibcode:
 1990aiaa.meetU....J
 Keywords:

 Boundary Layer Equations;
 KEpsilon Turbulence Model;
 Oscillating Flow;
 Turbulent Boundary Layer;
 Pressure Gradients;
 Shear Stress;
 Three Dimensional Boundary Layer;
 Two Dimensional Flow;
 Wall Flow;
 Fluid Mechanics and Heat Transfer