Gradient is zero

n.d.ageev@gmail.com · September 25, 2017, 06:17

I try to optimize the forebody shape. I have created my own forebody, generated mesh, performed direct and continuous adjoint solution (Euler equations). I have also checked if the onera m6 Euler optimization workable. But now I got zero gradient as a result of the SU2_DOT work. Can somebody help me with this? The working directory (without mesh and results) attached.

talbring · September 25, 2017, 09:34

Hi,

can you also attach the mesh file ? Thanks!

Tim

n.d.ageev@gmail.com · September 25, 2017, 09:55

Thank you, Tim!
Today I have found that scales of FFD and mesh aren't equal and FFD is "inside the model". I fixed it and hope that it will work now :-)

talbring · September 25, 2017, 09:59

Alright!

Just a tip: you can visualize the FFD box after running SU2_DEF by opening the FFD_boxes.dat file within Tecplot.

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September 25, 2017, 09:34		#2
talbring Super Moderator Tim Albring Join Date: Sep 2015 Posts: 195 Rep Power: 11	Hi, can you also attach the mesh file ? Thanks! Tim

September 25, 2017, 09:55		#3
n.d.ageev@gmail.com New Member Nikita Ageev Join Date: May 2017 Posts: 11 Rep Power: 9	Thank you, Tim! Today I have found that scales of FFD and mesh aren't equal and FFD is "inside the model". I fixed it and hope that it will work now :-)

September 25, 2017, 09:59		#4
talbring Super Moderator Tim Albring Join Date: Sep 2015 Posts: 195 Rep Power: 11	Alright! Just a tip: you can visualize the FFD box after running SU2_DEF by opening the FFD_boxes.dat file within Tecplot.