Development of a complete model of turbulence revisited
Abstract
A comprehensive and critical review of closure approximations for two equation turbulence models has been made. Particular attention has focused upon the scaledetermining equation in an attempt to find the optimum choice of dependent variable and closure approximations. Using a combination of singular perturbation methods and numerical computations, this report demonstrates: (1) conventional ke and komega sq formulations generally are inaccurate for boundary layers in adverse pressure gradient; (2) using socalled wall functions tends to mask such models' shortcomings; and (3) there exists a more suitable choice of dependent variables which is far more accurate for adverse pressure gradient.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 December 1983
 Bibcode:
 1983STIN...8421836W
 Keywords:

 Approximation;
 Closures;
 Equations Of Motion;
 Incompressible Flow;
 Prediction Analysis Techniques;
 Turbulence Models;
 Turbulent Boundary Layer;
 Incompressible Boundary Layer;
 NavierStokes Equation;
 Perturbation;
 Pressure Gradients;
 Turbulent Flow;
 Viscous Flow;
 Walls;
 Fluid Mechanics and Heat Transfer