Sustaining terms to prevent decay: SST k-w
 

Hi
I have been reading some literature by Spalart, Rumsey, and others who developed the CFD codes.
They talk about the importance of having sustaining terms in the SST k-w model to prevent decay of turbulence and reducing the grid dependence on transition behaviour.

In my own Fluent simulations, I do not see a drop in the value of TKE and omega from the inlet to the wing. I have a distance of approximately 50 chord lengths from the inlet to the leading edge.

• Does Fluent have sustaining terms defined in it?
• Or is the drop just too small to numerically visualise?
• Or is the best way to check its decay is by plotting post-processing the boundary layer and finding the point where it goes fully turbulent, i.e mu_t/mu >=1?
• Should I be defining source terms into my fluid domain to sustain the turbulence?

did you turn on intermittency transition model?

you may also try to use Transition SST model (4equtions)