Foam-extend solution control

armitatz · April 10, 2016, 04:44

Hi,

I use laplacianFoam in steady state in openfoam 3.0.1 and when it converges it stops even if it hasn't reached the maximum of timesteps. When I use the same problem in foam extend 3.2 even if it converges and the values don't change it doesn't stop and it goes all the way.

I saw in the src directories of both installations and the solutioncontrol is missing from foam extend. Is there a way to make foam extend stop when it reaches convergence?

armitatz · May 12, 2016, 07:00

anybody yet?

anishtain4 · May 13, 2016, 01:14

seems to be a bug, you probably want to report it. Or you can copy the missing part and recompile Openfoam all over again.

armitatz · May 13, 2016, 02:29

Thank you for the reply. The problem is not at openFoam but at foam-extend. My question is if convergence control has been implemented in foam-extend and how to enable it is an easy way.

Adding patches to openFoam and foam extend goes beyond my capacity.

Jack001 · June 23, 2016, 13:22

I have the exact same issue. Does anyone know of a solution? I don't feel too confident messing about under the hood of openFoam, but this seems like a really trivial problem, as it should be solved with a simple "if solution field residual < convergenceCriterion then stop".

Anyone?

Jack001 · June 24, 2016, 08:05

Could someone maybe point out how this could be changed in the source code of whatever solver one may be using?

mbeaudoin · September 2, 2016, 16:00

Quote:

Originally Posted by Jack001

Could someone maybe point out how this could be changed in the source code of whatever solver one may be using?

Check under $FOAM_APP/solvers. Search for the string 'convergenceCriterion'.

The source code for the solver simpleFoam is a good example.

Martin

April 10, 2016, 04:44	Foam-extend solution control	#1
armitatz New Member andrew Join Date: Oct 2015 Posts: 11 Rep Power: 11	Hi, I use laplacianFoam in steady state in openfoam 3.0.1 and when it converges it stops even if it hasn't reached the maximum of timesteps. When I use the same problem in foam extend 3.2 even if it converges and the values don't change it doesn't stop and it goes all the way. I saw in the src directories of both installations and the solutioncontrol is missing from foam extend. Is there a way to make foam extend stop when it reaches convergence? Last edited by armitatz; April 11, 2016 at 03:23. Reason: typo error

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May 12, 2016, 07:00		#2
armitatz New Member andrew Join Date: Oct 2015 Posts: 11 Rep Power: 11	anybody yet?

May 13, 2016, 01:14		#3
anishtain4 Senior Member Mahdi Hosseinali Join Date: Apr 2009 Location: NB, Canada Posts: 273 Rep Power: 18	seems to be a bug, you probably want to report it. Or you can copy the missing part and recompile Openfoam all over again.

May 13, 2016, 02:29		#4
armitatz New Member andrew Join Date: Oct 2015 Posts: 11 Rep Power: 11	Thank you for the reply. The problem is not at openFoam but at foam-extend. My question is if convergence control has been implemented in foam-extend and how to enable it is an easy way. Adding patches to openFoam and foam extend goes beyond my capacity.

June 23, 2016, 13:22		#5
Jack001 Member Jack Join Date: May 2015 Posts: 98 Rep Power: 11	I have the exact same issue. Does anyone know of a solution? I don't feel too confident messing about under the hood of openFoam, but this seems like a really trivial problem, as it should be solved with a simple "if solution field residual < convergenceCriterion then stop". Anyone?

June 24, 2016, 08:05		#6
Jack001 Member Jack Join Date: May 2015 Posts: 98 Rep Power: 11	Could someone maybe point out how this could be changed in the source code of whatever solver one may be using?