[dnomdec]

Hi all,

I ran a steady state case with simpleFoam and converted the mesh/solutions to fluent format using foamMeshToFluent and foamDataToFluent.

Relevant part of my foamDataToFluent file:
p 1;
U 2;
k 5;
omega 63;

But when I ran fluent 3d and loaded the .msh and .dat files, I could not plot k and omega. For some reasons, the viscous model is set to laminar.

Anyone ran into this issue before? Thx in advance.

Ned

[dnomdec]

I found the reason -- forgot to set the turbulence model BEFORE I loaded the data. Now they plot fine.

However, when I choose report forces, I get zero viscous forces... do I need some specific quantities for fluent to calculate the viscous forces?

If so, how do I get those to be output in OpenFOAM?

Thx again,
Ned

[akarnik]

Ned,

As a newbie with openFOAm can you guide me as to where to get a list of the Unit Numbers (for p U k omega etc) we need for the conversion of data to fluent.

[dnomdec]

They should be in

$WM_PROJECT_DIR/applications/utilities/postProcessing/dataConversion/foamDataToF luent/fluentUnitNumbers.txt

[mahendra]

hi forum,

I am struggling to convert the reynold's stress form openFoam to Fluent, can anyone please help me ???
This is what I am writing in the foamDataToFluentDict, but in the command prompt it shows converting U, p, epsilon and k but nothing like Rxx, Ryy..etc.
Rxx 128;
Ryy 129;
Rzz 130;
Rxy 131;
Ryz 132;
Rxz 133;

Thanks,
Mahendra.

[ameya]

I think FoamData to Fluent conversions are not as accurate.

When i converted data of my simulations from foam to fluent, i got very absurd results.

All th inlet and outlets were set to pressure outlets also at boundary i had given Y veloity to be 0.5 m/sec in fluent it showed 0.2 m/sec.

If somebody has experienced similar problem plz let me kno how have you solved it.

[mahendra]

hi forum,

I am struggling to convert the reynold's stress and nut (when using SA model) from openFoam to Fluent, can anyone please help me ???
This is what I am writing in the foamDataToFluentDict, but in the command prompt it shows converting U, p, epsilon and k but nothing like Rxx, Ryy..etc.

Rxx 128;
Ryy 129;
Rzz 130;
Rxy 131;
Ryz 132;
Rxz 133;
NUT 150;

Thanks,
Mahendra.

[wassja]

@ ameya

I experience the same problem. foamData/MeshToFluent doesn't convert the BC's. This seems to give the wrong values at patches. I tried to calculate the flow through a simple tube and found the mass balance being about 10% wrong while comparing two surfaces near the inlet/outlet was fine.

So the conversion is accurate but incomlete.
I'm not sure if there's an option to copy also the boundaries, otherwise I'd have to write one myself.

Wassja

[HHOS]

Hello;

I have run a case in OpenFoam and exported the data to Fluent.

I think that I have done every step correctly, but the results doesn't fit -(0 0 0) viscous force???!!!!- :

                                      Pressure Forces                                      Viscous Forces                                       

                       ---------------------------------------------   --------------------------------------------- 
CALCULATED WITH FLUENT (7.1568559e-07 -2.1600499e-12 -4.6092907e-11)   (1.0075142e-06 6.5814021e-13 6.7834627e-12)  


IMPORTED INTO FLUENT   (7.4272094e-10 -1.6378229e-15 -4.8447411e-14)   (0 0 0)

AFTER 10000 ITERATIONS
WITH OPENFOAM          (7.4138412e-07 -1.54826353-12 -4.8549109e-11)   (1.0146894e-06 6.8149384e-13 -4.520761e-11)

The values of the velocity doesn't completely fit, not even between in the calculations done with OpenFoam and Fluent (see attachments).

I have read that the data transfer from OpenFoam to Fluent is not actually working.

Is that true? or there is something to do and fix it somehow???

Thank you!