An algebraic intermittency model for bypass and separation-induced transition is presented. The model modifies the production terms of a k-omega turbulence model. It uses only local variables and is tuned for turbomachinery flows. For bypass transition, two effects in an attached pre-transitional boundary layer are expressed: damping of small-scale disturbances induced by the free stream and breakdown of the near-wall perturbed flow with generation of fine-scale turbulence. For separated flow, the model describes breakdown of a laminar free shear layer. The model is a modified and extended version of an earlier model by the authors for bypass transition only (Kubacki and Dick, 2016)
