Comparative analysis of transition models at different farfield turbulence intensities

Abstract

Abstract. Four differential models for laminar-turbulent transition prediction were tested with different freestream turbulence levels on two cases: turbulent boundary layer and flow around NACA0021 airfoil. Computational results show that none of the considered models are able to predict transition in a wide range of freestream conditions. SA e N model is applicable only for natural transition scenario with low freestream turbulence intensity and predicts fully turbulent solutions in other cases. Among γ-based models SST γ-Re θ and SST γ have shown better agreement with experiment than SA γ.