There are two variables in ANSYS CFD-Post available: – First Blending Function for BSL and SST model – Second Blending Function for SST model The equations describing these variables (F1 and F2) can be found in the CFX Documentation: // Theory Guide // Turbulence and Wall Function Theory // Eddy Viscosity Turbulence Models // Two Equation Turbulence Models // The k-omega Models in ANSYS-CFX // The Shear Stress Transport (SST) Model. The first blending function is defining where the switch between k-omega and k-eps models takes place. The second blending function is limiting the eddy viscosity formulation.