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Shape returning to the initial condition

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Old   May 17, 2014, 13:45
Default Shape returning to the initial condition
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Sreekanth
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Hi,

When i run the simulation for optimization, I find that after an initial deformation, it gradually tends to get back to the initial shape. This repeats again.
I know that there is better solution, so it cant be that the initial solution is best.

What could I be doing wrong?

Configuration file is attached.

NB: My objective is to minimize the lift, hence i have multiplied the objective with a negative number.

Please have a look and let me know what all things I could be doing wrong. I have to finish my project soon but I am getting stuck at different places with SU2

Thank you.

Sreekanth
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File Type: txt coarsecavity.txt (15.7 KB, 6 views)
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Old   May 19, 2014, 17:00
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Brendan Tracey
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How are you calling the optimization?
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Old   May 20, 2014, 01:45
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shape_optimization.py -f coarsecavity.cfg -p 2
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Old   June 4, 2015, 20:04
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I have the same problem with the latest version of rotating NACA0012 test case. I don't get the same result with the tutorial without changing anything. NACA0012 goes back to NACA0012 after 37 designs and stays there.

shape_optimization.py -f rotating_NACA0012.cfg

Also I can't get the results in Figure (8): Function evaluation history in tutorial. Drag does not change much during evaluations and at the end goes back to the same location.

Here is the output, looks like OBJFUN and GNORM is not changing much

NIT FC OBJFUN GNORM
1 1 2.158280E-06 2.223470E-03
2 12 2.158351E-06 2.224594E-03


Developers: can you please check this?
Thanks!!
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