Which basis function does SU2 employ in FFD technique of Shape Design Module?

lbfhappy · April 7, 2018, 04:26

Hey all,

Which basis function does SU2 employ in FFD technique of Shape Design Module? Bernstein, B-Spline or NURBS? I learned these three basis functions from literature. May be it is another one that I didn't mentioned.

Bingfei

tomp1993 · April 15, 2018, 15:58

Hi Bingfei,
please check the contents of config_template.py which would be included within your SU2 master file.
look for the line "FFD_BLENDING".
this provides options for you to use different types of basis functions according to your preference or design requirements.
best wishes
Tom

lbfhappy · April 19, 2018, 11:09

Thanks Tom for your reminding!

I found the "FFD_BLENDING" in the config_template.cfg. And I saw there's two option of the "FFD_BLENDING": BEZIER and BSPLINE_UNIFORM.

But I didn't use this function in my configuration file when doing shape optimization operation. So how can I know the basis function of FFD in SU2 by default?

Bingfei

talbring · April 24, 2018, 07:25

In the config_template.cfg file you can find all available config options along with their default values.

Tim

lbfhappy · April 25, 2018, 10:12

Thanks Tim!

I think I understand and find the default basis function of FFD.

Bingfei

April 7, 2018, 04:26	Which basis function does SU2 employ in FFD technique of Shape Design Module?	#1
lbfhappy New Member Bingfei Join Date: Nov 2015 Posts: 25 Rep Power: 11	Hey all, Which basis function does SU2 employ in FFD technique of Shape Design Module? Bernstein, B-Spline or NURBS? I learned these three basis functions from literature. May be it is another one that I didn't mentioned. Bingfei

April 24, 2018, 07:25		#4
talbring Super Moderator Tim Albring Join Date: Sep 2015 Posts: 195 Rep Power: 11	In the config_template.cfg file you can find all available config options along with their default values. Tim __________________ Developer Director @ SU2 Foundation Get involved: Facebook https://www.facebook.com/su2code Github https://github.com/su2code Twitter https://twitter.com/su2code

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April 15, 2018, 15:58		#2
tomp1993 Member tom pratt Join Date: Jan 2016 Posts: 55 Rep Power: 10	Hi Bingfei, please check the contents of config_template.py which would be included within your SU2 master file. look for the line "FFD_BLENDING". this provides options for you to use different types of basis functions according to your preference or design requirements. best wishes Tom

April 19, 2018, 11:09		#3
lbfhappy New Member Bingfei Join Date: Nov 2015 Posts: 25 Rep Power: 11	Thanks Tom for your reminding! I found the "FFD_BLENDING" in the config_template.cfg. And I saw there's two option of the "FFD_BLENDING": BEZIER and BSPLINE_UNIFORM. But I didn't use this function in my configuration file when doing shape optimization operation. So how can I know the basis function of FFD in SU2 by default? Bingfei

April 25, 2018, 10:12		#5
lbfhappy New Member Bingfei Join Date: Nov 2015 Posts: 25 Rep Power: 11	Thanks Tim! I think I understand and find the default basis function of FFD. Bingfei