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-   -   Decay of turbulence intensity in SST transitional model (http://www.cfd-online.com/Forums/fluent/101671-decay-turbulence-intensity-sst-transitional-model.html)

Nick R May 10, 2012 07:51

Decay of turbulence intensity in SST transitional model
 
Hi all,


I was wondering if you've had any experience with the SST transitional model (gamma theta) in Fluent. I am using the model for flow over a wing but I am struggling with setting up the correct turbulence BCs to get the intensity of about 0.8% near the leading edge of the wing. I have done some trial and error to no avail. What puzzles me is that when I set Tu at 5%, in the solution the Tu contour plot shows values much higher in the region near the inlet where the Tu was set to 5%. I'd appreciate any rules of thumb (provided they exist) to estimate the viscosity ratio and Tu at inlet.


Regards,
Nick

rstewart April 17, 2014 17:54

Did you ever have any luck resolving this issue?

I am having a similar problem, and my turbulence intensity is actually increasing when I am expecting it to decay.

Nick R April 17, 2014 22:15

I ended up using CFX instead which resolved my issues.


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