CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > SU2 > SU2 Shape Design

Gradient is zero

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   September 25, 2017, 05:17
Exclamation Gradient is zero
  #1
New Member
 
Nikita Ageev
Join Date: May 2017
Posts: 11
Rep Power: 9
n.d.ageev@gmail.com is on a distinguished road
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.
Attached Files
File Type: zip wedge3.zip (188.0 KB, 9 views)
n.d.ageev@gmail.com is offline   Reply With Quote

Old   September 25, 2017, 08:34
Default
  #2
Super Moderator
 
Tim Albring
Join Date: Sep 2015
Posts: 195
Rep Power: 10
talbring is on a distinguished road
Hi,

can you also attach the mesh file ? Thanks!

Tim
talbring is offline   Reply With Quote

Old   September 25, 2017, 08:55
Default
  #3
New Member
 
Nikita Ageev
Join Date: May 2017
Posts: 11
Rep Power: 9
n.d.ageev@gmail.com is on a distinguished road
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 :-)
n.d.ageev@gmail.com is offline   Reply With Quote

Old   September 25, 2017, 08:59
Default
  #4
Super Moderator
 
Tim Albring
Join Date: Sep 2015
Posts: 195
Rep Power: 10
talbring is on a distinguished road
Alright!

Just a tip: you can visualize the FFD box after running SU2_DEF by opening the FFD_boxes.dat file within Tecplot.
talbring is offline   Reply With Quote

Reply

Tags
gradient, optimization, su2, zero gradient

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
question regarding LES of pipe flow - pimpleFoam Dan1788 OpenFOAM Running, Solving & CFD 37 December 26, 2017 14:42
Periodic flow using Cyclic - comparison with Fluent nusivares OpenFOAM Running, Solving & CFD 30 December 12, 2017 05:35
[General] Problem in calculating Gradient masaaki ParaView 0 March 16, 2015 06:38
vortex cause pressure gradient or pressure gradient induce vortex? fruitkiwi Main CFD Forum 4 June 12, 2012 01:12
How to compute gradient for non-orthogonal grids? Paul Hsieh Main CFD Forum 3 November 11, 2003 04:52


All times are GMT -4. The time now is 16:56.