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FFD box for axisymmetrical body part

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Old   January 27, 2021, 01:36
Default FFD box for axisymmetrical body part
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Umut Can
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Hello everyone,

I am planning to use SU2 adjoint optimizer for the case in which flow problem is 3D.
However, geometrical shape that I want to optimize is axisymmetric part (nothing but body of revolution). Therefore I need to alter the design points just on a single line and other internal points must deform accordingly so that axisymmetrical part stays axisymmetric.

How can I define such a FFD box?

Thanks
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Old   January 28, 2021, 07:10
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Cylindrical coordinates FFD.
I know we have the option but I never used it. Look around the testcases folder you might find an example.
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Old   February 1, 2021, 15:20
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Quote:
Originally Posted by pcg View Post
Cylindrical coordinates FFD.
I know we have the option but I never used it. Look around the testcases folder you might find an example.
Thanks for your reply. However, I could not find anything related.
any help will be appreciated.
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Old   February 2, 2021, 06:29
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Here: https://github.com/su2code/SU2/tree/...ylindrical_ffd
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Old   February 6, 2021, 11:59
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Quote:
Originally Posted by pcg View Post
thanks, this creates ffd box in cylindirical coordinates. However, modified shape in optimization becomes something very far away from body of revolution.
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Old   February 6, 2021, 12:58
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It can be done, see attached, but you need to move two points together because the FFD cannot be 0 degree around the circumference (this would probably not work directly with the shape_optimization script).
Attached Images
File Type: png Selection_141.png (37.2 KB, 5 views)
Attached Files
File Type: txt set_cylindrical.txt (11.1 KB, 1 views)
File Type: txt def_cylindrical.txt (11.1 KB, 1 views)
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Old   February 6, 2021, 14:37
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Quote:
Originally Posted by pcg View Post
It can be done, see attached, but you need to move two points together because the FFD cannot be 0 degree around the circumference (this would probably not work directly with the shape_optimization script).
I have tried with your files, I attached below mesh obtained at design # 14.
Any idea?
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File Type: png Screenshot from 2021-02-06 21-34-56.png (15.6 KB, 9 views)
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