FURTHER DEVELOPMENT OF THE K-ZETA (ENSTROPHY) TURBULENCE CLOSURE-MODEL

The k-zeta model is extended to the study of two-dimensional and three -dimensional separated external flows where Morkovin's hypothesis is e xpected to hold. The resulting model is free of damping and wall funct ions and is coordinate independent. Further, all modeled correlations are tensorially consistent and Galilean invariant. Applications includ e a variety of separated flows over airfoils and a cylinder/offset fla re juncture. Comparisons are made with other turbulence models and exp eriment. In general, good agreement with experiment is indicated. The results demonstrate that it is possible to develop a two-equation turb ulence model that is capable of predicting separated flows without sac rificing performance for free shear layers.