José Mantovani
posted this
02 September 2018

- Last edited 02 September 2018
Very thanks Raul, I will make the simulation through this procedure and soon I share here my results. I try to do the simulation of BFS in LES approach because I tested several ways to converge the graphs of Cp and Cf and also the reattach point, but I get good results for Cf and rettach point but the Cp over-predicts the experimental data in all ways... Look the charts in image below.

The discussion of this simulation stay here, I don't now if you looked this thread: https://studentcommunity.ansys.com/thread/understanding-the-behavior-of-the-solution-results-by-fluent/ If you can give some comment about or some tips I will be very grateful.

Like me, other friends here in the community, found it very funny that the Cf graph and reconnection points are close to the experimental but the Cp near the reconnection over-predicts the experimental value. I have tested several models and meshes but, for example, when I improve the reconnection point the graph Cf is further from the experimental and for the graph of Cp I always get this values higher close to x / h = 5 ... I am happy for being able to "validate" my simulation, but only this detail of the Cp chart is missing. So I decided, within my limitations, to take an LES approach.

A while ago you made available to me the community a file, which even has this formula to find the size of the time step. And at the end of the file, there is a slide with this image, I do not know if I can access the Customer Portal with the login here in the community. Could you pick up and make this file available to me? (in the image below). If you can comment on my RANS results for BFS and because I always get an over-preditc on the Cp chart I will be very grateful as I am already for your huge help.

One more time, very thanks for your attention and helping! I will try make the LES approach and soon I give my results here.

Best Regards,

Mantovani.