CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > OpenFOAM Running, Solving & CFD

OpenFOAM and Adjoint solution

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

Reply
 
LinkBack Thread Tools Display Modes
Old   March 6, 2014, 12:18
Default OpenFOAM and Adjoint solution
  #1
Member
 
aerospain
Join Date: Sep 2009
Location: Madrid, Spain
Posts: 84
Rep Power: 7
aerospain is on a distinguished road
Send a message via Skype™ to aerospain
Hi everyone,

I have read about the capability in OpenFOAM to run the Adjoint "version" of the Navier-Stokes equations for shape optimization.

Is there a way of just calculating the Adjoint solution so I can locate the more sensible regions in an afterbody (cartesian) wake in order to design wake stability measures?

Thanks!
aerospain is offline   Reply With Quote

Old   March 7, 2014, 06:43
Default
  #2
Member
 
Roland
Join Date: Mar 2009
Location: Netherlands
Posts: 62
Rep Power: 8
sylvester is on a distinguished road
Hi,

Probably best to start with the 'adjointShapeOptimizationFoam' solver (a simpleFoam derivative), while maintaining alpha = 0.

Beware though, adjoint simulations are notoriously unstable.

Good luck!

Sylvester
sylvester is offline   Reply With Quote

Old   March 7, 2014, 06:45
Default
  #3
Member
 
aerospain
Join Date: Sep 2009
Location: Madrid, Spain
Posts: 84
Rep Power: 7
aerospain is on a distinguished road
Send a message via Skype™ to aerospain
Thank you Sylvester,

I'll give it a go during the weekend.

Where could I find info about keeping stability under control?

Thanks!
aerospain is offline   Reply With Quote

Old   March 7, 2014, 07:31
Default
  #4
Member
 
Roland
Join Date: Mar 2009
Location: Netherlands
Posts: 62
Rep Power: 8
sylvester is on a distinguished road
Quote:
Originally Posted by aerospain View Post
Where could I find info about keeping stability under control?
If I knew that, my (CFD) life would be so much better!

You could look up my old posts on adjoint, they might help you a bit. Since then I haven't worked the subject anymore, so I haven't made much additional progress.

regards,
Sylvester
sylvester is offline   Reply With Quote

Reply

Thread Tools
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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
adjoint Shape Optimization mechy OpenFOAM Running, Solving & CFD 9 September 5, 2014 13:27
adjoint method- uniformity Envolly OpenFOAM Programming & Development 8 July 9, 2013 01:29
Adjoint Methods in OpenFOAM treima OpenFOAM Programming & Development 4 May 24, 2012 05:57
Adjoint solver for flow problems jelmer OpenFOAM Running, Solving & CFD 10 November 10, 2011 03:55
OpenFOAM 1.7.1: Oscillating CFL number LarsPT OpenFOAM Running, Solving & CFD 4 September 18, 2010 03:55


All times are GMT -4. The time now is 04:04.