CFD Online Discussion Forums

Excellent tutorial for debugging

Posted March 10, 2017 at 11:50 by kindle

banana and old-school printing out.

Cool !

Quote:

Originally Posted by wyldckat

OK, so as I mentioned in one of the posts above, having an example case as a basis and using the "banana" trick, here's what I've done (used OpenFOAM 2.3.x for this example):

Made a copy of the tutorial "lagrangian/DPMFoam/Goldschmidt" and ran the utility blockMesh.
Then I had to look at which file needed to modified. All pointed to the file "constant/kinematicCloudProperties".
Now I had

...

kindle

New Member

Posted in programming

Views 1520 Comments 0 kindle is offline

printStack(Foam::Ostream& ) with simpleFoam -parallel

Posted March 10, 2017 at 04:55 by kindle
Updated June 7, 2017 at 12:15 by kindle

debug version will give line numbers. Ok. May worth the cost.

Quote:

Originally Posted by gschaider

A bit more information would be nice:
- does this problem also occur when you run the case in serial
- when does it happen (during the construction of the turbulence model, but I deduced that from your stack-trace)
- line numbers would be nice, but you'll need a Debug-version of OF for that

My guess is that this is (again) the old "I set k/epsilon/omega to 0 in the initial conditions (or

...

kindle

New Member

Posted in informatic issues

Views 1365 Comments 0 kindle is offline

Floating point exception (resolved. problem in mesh quality)

Posted March 10, 2017 at 04:54 by kindle
Updated June 7, 2017 at 12:18 by kindle

Try to get this tracking process of problem

Quote:

Originally Posted by cristian.arbe

Hello all,

I am relatively new to OpenFoam and I am trying to simulate a photoreactor on incompressible turbulent flow at steady-state. I copied most of the code of the pitzDaily model from the tutorials adjusting all the parametres for my case. When running the case in parallel I get the following error:

Code:

mpirun noticed that process rank 7 with PID 3333 on node XXXXX exited on signal 8 (Floating point exception).

Commands

...

kindle

New Member

Posted in mesh & dynamic mesh

Views 1457 Comments 0 kindle is offline

access to data

Posted February 28, 2017 at 05:17 by kindle
Updated February 28, 2017 at 12:41 by kindle

// access to field<Type>

Ex: in /finiteVolume/fields/fvPatchField/derived/turbulentInlet.C.
This class is templated, here we take a example for vector field:

Code:

Field<vector> randomField(this->size());

to have access to x-component for example

Code:

Info << "randomField = " << randomField.component(vector::X) <<
    endl;
// vector::X=0 this enum equals to 0 as enum's

...

kindle

New Member

Posted in programming

Views 1029 Comments 0 kindle is offline

typo error

Posted February 23, 2017 at 05:03 by kindle

Q : Get very nasty output in the log when running in parallel ?
A : may be forgot the "-parallel" flag on the command line.
E : In stead of

Code:

mpirun -np 16 icoFoam -parallel > log

you trust your memory and write

Code:

mpirun -np 16 icoFoam > log

Then you will directly get the time directories of the whole domaine and there will be no time directionary in processor*. And in log, it seems that multiple processes are writing at the same time....

kindle

New Member

Posted in Q&A

Views 1105 Comments 0 kindle is offline