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-   -   OpenFOAM and Adjoint solution (https://www.cfd-online.com/Forums/openfoam-solving/130961-openfoam-adjoint-solution.html)

aerospain March 6, 2014 11:18
OpenFOAM and Adjoint solution
 
Hi everyone,

I have read about the capability in OpenFOAM to run the Adjoint "version" of the Navier-Stokes equations for shape optimization.

Is there a way of just calculating the Adjoint solution so I can locate the more sensible regions in an afterbody (cartesian) wake in order to design wake stability measures?

Thanks!

sylvester March 7, 2014 05:43
Hi,

Probably best to start with the 'adjointShapeOptimizationFoam' solver (a simpleFoam derivative), while maintaining alpha = 0.

Beware though, adjoint simulations are notoriously unstable.

Good luck!

Sylvester

aerospain March 7, 2014 05:45
Thank you Sylvester,

I'll give it a go during the weekend.

Where could I find info about keeping stability under control?

Thanks!

sylvester March 7, 2014 06:31
Quote:
Originally Posted by aerospain (Post 478734)
Where could I find info about keeping stability under control?
If I knew that, my (CFD) life would be so much better!

You could look up my old posts on adjoint, they might help you a bit. Since then I haven't worked the subject anymore, so I haven't made much additional progress.

regards,
Sylvester


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