[zfaraday]

Hello FOAMers,

Lately I have been playing with the "circuit board colling" tutorial down to "heatTransfer/buoyantSimpleFoam" folder in order to understand the thermal baffles functionality and creation.

As it is supposed, it ran well (I haven't checked deeply the log file, but at least it seems it reached a solution. Come on!! It's a tutorial, it HAS TO work fine!). However, when I run paraFoam to check the results, if I check the T field in the Volume Fields section and click on Apply button the application crashes suddenly. It only happens when T file is selected to be displayed.

After I discovered it, I tried to figure out what the problem was on my own (I couldn't, indeed, otherwise now I wouldn't be here typing this). I checked the log files generated and I found something suspicious in the log.createBaffles file shown below.

/*---------------------------------------------------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  2.3.x                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
Build  : 2.3.x-d406bd3aab60
Exec   : createBaffles -overwrite
Date   : Sep 01 2014
Time   : 17:23:06
Host   : "linux-cfd"
PID    : 5960
Case   : /home/cfd/OpenFOAM/cfd-2.3.x/run/tutorials/heatTransfer/buoyantSimpleFoam/circuitBoardCooling
nProcs : 1
sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster
allowSystemOperations : Allowing user-supplied system call operations

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time

Create mesh for time = 0

Reading baffle criteria from createBafflesDict

Not converting faces on non-coupled patches.

Reading geometric fields

Reading volScalarField alphat
Reading volScalarField p_rgh
Reading volScalarField mut
Reading volScalarField p
Reading volScalarField k
Reading volScalarField T
Reading volScalarField epsilon
Reading volVectorField U
Created zone baffleFacesThermoBaffle1D at index 0 with 16 faces
Created zone baffleFacesThermoBaffle3D at index 1 with 16 faces
Converted 32 faces into boundary faces in patches 
4
(
baffleFacesThermoBaffle1D_master
baffleFacesThermoBaffle1D_slave
baffleFacesThermoBaffle3D_master
baffleFacesThermoBaffle3D_slave
)


--> FOAM Warning : 
    From function createBaffles
    in file createBaffles.C at line 773
    Setting field on boundary faces to zero.
You might have to edit these fields.
Selecting extrudeModel linearNormal
    Selecting region model functions
    none

The thermal baffle is 3D 

Selecting thermodynamics package 
{
    type            heSolidThermo;
    mixture         pureMixture;
    transport       constIso;
    thermo          hConst;
    equationOfState rhoConst;
    specie          specie;
    energy          sensibleEnthalpy;
}

Selecting radiationModel opaqueSolid
Selecting absorptionEmissionModel none
Selecting scatterModel none
Writing mesh to 0
End

#0  Foam::error::printStack(Foam::Ostream&) at ??:?
#1  Foam::sigSegv::sigHandler(int) at ??:?
#2   in "/lib64/libc.so.6"
#3   at thermalBaffleFvPatchScalarField.C:?
#4  Foam::compressible::turbulentTemperatureRadCoupledMixedFvPatchScalarField::~turbulentTemperatureRadCoupledMixedFvPatchScalarField() at ??:?
#5  Foam::compressible::thermalBaffleFvPatchScalarField::~thermalBaffleFvPatchScalarField() at ??:?
#6  Foam::PtrList<Foam::fvPatchField<double> >::~PtrList() at ??:?
#7  Foam::GeometricField<double, Foam::fvPatchField, Foam::volMesh>::~GeometricField() at ??:?
#8  Foam::basicThermo::~basicThermo() at ??:?
#9  Foam::heSolidThermo<Foam::solidThermo, Foam::pureMixture<Foam::constIsoSolidTransport<Foam::species::thermo<Foam::hConstThermo<Foam::rhoConst<Foam::specie> >, Foam::sensibleEnthalpy> > > >::~heSolidThermo() at ??:?
#10  Foam::regionModels::thermalBaffleModels::thermalBaffle::~thermalBaffle() at ??:?
#11  Foam::regionModels::thermalBaffleModels::thermalBaffle::~thermalBaffle() at ??:?
#12  Foam::compressible::thermalBaffleFvPatchScalarField::~thermalBaffleFvPatchScalarField() at ??:?
#13  Foam::compressible::thermalBaffleFvPatchScalarField::~thermalBaffleFvPatchScalarField() at ??:?
#14  Foam::PtrList<Foam::fvPatchField<double> >::~PtrList() at ??:?
#15  Foam::GeometricField<double, Foam::fvPatchField, Foam::volMesh>::~GeometricField() at ??:?
#16  Foam::GeometricField<double, Foam::fvPatchField, Foam::volMesh>::~GeometricField() at ??:?
#17  Foam::PtrList<Foam::GeometricField<double, Foam::fvPatchField, Foam::volMesh> >::~PtrList() at ??:?
#18  
 at ??:?
#19  __libc_start_main in "/lib64/libc.so.6"
#20  
 at /home/abuild/rpmbuild/BUILD/glibc-2.17/csu/../sysdeps/x86_64/start.S:126

It's a weird error message since I think that the process is finished when the error appears. I don't understand what the error means, was there any problem when the baffles were created?

After that I made some tests. I tried to only create one of the two baffles separately, instead of both at the same time, and I found out something that may be relevant. When I only create the 1D baffle no error appears in the log.createBaffles file and I'm allowed to see the temperature distribution with paraFoam. When I create the 3D baffle, though, the error comes up again and paraFoam crashes too.

What is not going right with the 3D baffle creation in the tutorial? As I said, this is the original tutorial, so it is supposed to work properly out of the box, isn't it? I really need some help with this because I have to learn how to create thermal baffles to solve a similar (but a little more complicated) problem.

Thanks in advance!

Alex

Note: I couldn't avoid to write some personal thoughts (about obvious facts...Oh! I did it again...) that came out of my mind...

[Walt]

Hey Alex

Sorry for the delayed answer. I'm completly new in OpenFOAM and saw your thread today. I ran the turtorial "circuitBoardCooling" and for me there is no error, when i create the baffle. Have you tried to run the case with v. 2.3.0? With this version, it works for me.


Best regards

Walter

[zfaraday]

Hi Walter,

Thanks for your answer. Finally I could find the solution some time ago. I don't remember what I did to make it run, but I already got it.

Regards,

Alex

[Walt]

hey Alex

i have a question: have you ever tried/managed to run the buoyantSimpleFoam-Solver in parallel?

I tried it and my problem is, that the 3d baffle seems to have his own polymesh which will not decomposed with the normal command decomposePar.

best regards

Walter

edit: ah it was easier then i've expected. i had to decompose the 3d baffle with the command: decomposePar -region *name of 3d baffle*