Comprehensive Investigation of k-ε and k-ω Turbulence Models in Simulation Turbulent Supersonic Boundary Layer Generated over Smooth and Rough Flat Plates at Very High Reynolds Numbers

In this paper, the accuracy of k-ε and k-ω turbulence models in super sonic boundary layer capturing of smooth/rough flat plates have been comprehensively investigated. Among these investigations, some sorts of sensitivity analysis, including change in turbulence model, generated-grid density, near wall affects, cμ magnitude (for boundary layers generated on smooth flat plates), and change in CKs, and also K+ s (for boundary layers generated on rough flat plates) have been performed. Also, the effects of compressibility on the Re laminarization of the turbulent boundary layer have been investigated in details. Finally, the accuracy of these turbulence models in capturing Cf/Cf0 for Mach number range lower than 5 have been numerically investigated. To confirm the validity of the results, the numerical results have been compared with some published references.