FFD set up inside nuzzle

nadav itz · October 20, 2021, 05:21

Hello SU2 users,

I'm trying to set up a 3D FFD box for the design of nuzzle intake.
After having a few FFD set-up I noticed that if I place the FFD inside the nuzzle the FFD mapping procedure doesn't work well. This causes the optimization process to end after 1 iteration because SU2_DOT cannot get the gradient and they all equal zero.
When I set the FFD outside the nuzzle, the optimization process work well but the FFD box was far from the surfaces of my model.
I am interested in knowing if the FFD can be set inside the nuzzle. I couldn't find an example for nuzzle intake optimization and I'm not sure why it's happening.

Thanks for the help!

I'm working with SU2 v7.1.1

TKatt · February 7, 2022, 12:12

Maybe take a look at one of the design tutorials of the website: This one https://su2code.github.io/tutorials/Species_Transport/ is kind of a nozzle outlet, so all the relevant FFD features should be applicable similarly. Just dont mind the Species Transport aspects and this maybe could be of help for you.

October 20, 2021, 05:21	FFD set up inside nuzzle	#1
nadav itz New Member Join Date: Jul 2021 Posts: 2 Rep Power: 0	Hello SU2 users, I'm trying to set up a 3D FFD box for the design of nuzzle intake. After having a few FFD set-up I noticed that if I place the FFD inside the nuzzle the FFD mapping procedure doesn't work well. This causes the optimization process to end after 1 iteration because SU2_DOT cannot get the gradient and they all equal zero. When I set the FFD outside the nuzzle, the optimization process work well but the FFD box was far from the surfaces of my model. I am interested in knowing if the FFD can be set inside the nuzzle. I couldn't find an example for nuzzle intake optimization and I'm not sure why it's happening. Thanks for the help! I'm working with SU2 v7.1.1

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February 7, 2022, 12:12		#2
TKatt Member na Join Date: Jul 2018 Posts: 90 Rep Power: 8	Maybe take a look at one of the design tutorials of the website: This one https://su2code.github.io/tutorials/Species_Transport/ is kind of a nozzle outlet, so all the relevant FFD features should be applicable similarly. Just dont mind the Species Transport aspects and this maybe could be of help for you.