CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   SU2 (http://www.cfd-online.com/Forums/su2/)
-   -   Issue with RANS optimization of Onera M6 wing (http://www.cfd-online.com/Forums/su2/124680-issue-rans-optimization-onera-m6-wing.html)

diwakaranant October 10, 2013 14:38

Issue with RANS optimization of Onera M6 wing
 
5 Attachment(s)
Hi

I have been trying to do RANS shape optimization on Onera M6 wing
(hybrid coarse mesh) using SU2 v 2.0.5 for quite some time,
but have been unable to do so.

When I see the CD gradient of the RANS case after first design cycle,
it is observed that the gradients are very high.

The values of DV_VALUE_NEW in the config_MDC.cfg file seems to be
very large resulting in a very large mesh deformation and consequently
blowing up of the flow simulation

Can anyone tell how are the values of DV_VALUE_NEW for each control
points are calculated in config_MDC.cfg file for mesh deformation ?

Also, I want to tell that the gradient projection code, SU2_GPC, always
takes the step size of 0.001, whatever be the value given for DV_VALUE_NEW. Why is this happening ?

I am attaching the initial and deformed ffd box plot and .cfg files.

Thanks
Anant

economon October 11, 2013 15:44

Hi Anant,

Please see my post over in the other thread: http://www.cfd-online.com/Forums/su2...a-m6-wing.html.

All the best,
Tom


All times are GMT -4. The time now is 23:51.