The algebraic transition model belongs to the family of Local-Correlation-based Transition Models (LCTM) and is a further simplification of the Intermittency Transition Model which is based on a single transport equation for the intermittency (gamma-transport-eqn). The simplification avoids using the transport equation and formulates the intermittency as an algebraic equation. This is possible because it has been observed that in the transport equation-based models, the source terms are dominant compared to the convection/diffusion terms.