Dear CFD users

I am performing a LES simulations on a cold flow of a Bluff-body burner. When I look at the Transient Statistics available in the Output Control tab, there is something called LES Dynamic Model Coefficient.

I though that the only model for LES and Subgridscale available in CFX was the Smagorinski model... When I look on what I found in the Output Control it seems that their is another model available. If it not the case what this LES Dynamic Model Coefficient mean???

I am looking to use the Germano dynamic approach, as it let the C constant be dynamic for each time step.

Thanks in advance

Dear Jonathan,

What version of ANSYS CFX are you using? I just look in ANSYS 11.0, and there are 3 LES models: Smagorinsky, WALE and Dynamic.

Setup the case as transient, and under Domain/Fluid Models/Turbulence Model check in the ... section.

Opaque

Dear Opaque

Thanks for your tips. You are right... I have been in another computer in which Ansys 11.0 is installed. I found the Dynamic model. My problem is that on the cluster of my school the WALE and Dynamic option do not appear.

Is there a way to make them appearing. Should we get a special license for that?

Regards

Have you enabled beta fatures of CFX. If you do they should appear where opaque mentioned.

alpha

Dear Alpha

Would you please tell me how can I do to verify if they are turned ok?

regards

look in the options menu in pre. Beta features are enabled with a tickbox.

Dear Hekler

Thanks for your tips. I finally find out how to enable de beta features of CFX. Great I will be able to run LES-Dynamic!! regards