Visualizing Laminar and Turbulent Regimes in a Transitional Simulation

How to visualize the laminar and turbulent regimes in a transitional simulation in Ansys CFX?

For understanding the influence of laminar-to-turbulent transition in Ansys CFX, it is very useful to be able to visualize the areas of laminar fluid flow.

Use a contour plot of variable Turbulence Intermittency (gamma in what follows) in CFD-Post.

1. The value of gamma = 0.02 is the value used for the laminar regimes. In a laminar boundary layer (even if there is some free-stream turbulence outside the laminar boundary layer) one expects to see a thin blue region of gamma spanning also in the laminar boundary layer (not only at the first cell from the wall). This low gamma ensures that production of turbulence kinetic energy is zero.
2. In the regions where turbulent boundary layers have developed, gamma can also take low values close to 0.02 in the viscous sublayer (y+ of up to 3). This does not affect the production as for y+<5 production is in any case very low. The important point is that gamma is becoming 1 for y+>5.

For more details, refer to this document.