[Josh]

Hi all -

I am modeling the T106A low-pressure turbine, shown here:



I am using the SST turbulence model. Here is my pressure distribution graph:



Ignore the orange line (Tu = 1%). Both the red and green lines (my initial results and my results with a quadrupled grid density, respectively) correlate alright with the experimental, but don't capture the laminar separation bubble on the suction surface (the experimental results have a pressure plateau).

At a recent fluids conference, a PhD student told me he obtained very good results (in comparison with Stieger's, found here: http://www-g.eng.cam.ac.uk/whittle/T106/Start.html) when he used the SST model with the low Reynolds feature turned on. I know the low Reynolds number feature exists in Fluent, but in CFX-Pre, I am unsure of how to turn off the automatic wall function.

After digging through the Help file, I have found many topics about the low Reynolds model, such as the required node refinement (at least 15 within the boundary layer for the low Re model, or 10 for the automatic wall function model), but I can't find any info on actually enabling the low Re model.

Does anyone know how to enable the low Re model and/or turn off the automatic wall function?